{"id":95928,"date":"2018-01-15T10:54:33","date_gmt":"2018-01-15T09:54:33","guid":{"rendered":"https:\/\/elithair.com\/uk\/?p=95928"},"modified":"2026-06-22T16:00:05","modified_gmt":"2026-06-22T16:00:05","slug":"vitamins-for-hair-loss","status":"publish","type":"post","link":"https:\/\/elithair.com\/uk\/blog\/vitamins-for-hair-loss\/","title":{"rendered":"Vitamins for Hair Loss: What Really Helps (and What Harms)"},"content":{"rendered":"\n<style id=\"mc-compare-css\">@media(max-width:600px){.mc-compare{min-width:0!important;width:100%;display:block}.mc-compare thead{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.mc-compare tbody,.mc-compare tr,.mc-compare td{display:block;width:100%}.mc-compare tr{margin:0 0 16px;border:1px solid #d9e2ec;border-radius:10px;overflow:hidden;background:#fff!important;box-shadow:0 1px 3px rgba(1,51,102,.06)}.mc-compare td{padding:11px 14px!important;border-bottom:1px solid #eef2f7!important;background:#fff!important}.mc-compare td:last-child{border-bottom:none!important}.mc-compare td:first-child{background:#013366!important;color:#fff!important;font-size:15.5px;font-weight:700!important;padding:12px 14px!important}.mc-compare td:not(:first-child)::before{content:attr(data-label);display:block;font-weight:700;color:#013366;font-size:11.5px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:3px}}<\/style>\n\n\n<div style=\"border:1px solid #cfe0f5;border-left:5px solid #0079F1;background:#f3f8ff;border-radius:10px;padding:18px 20px;margin-bottom:28px\">\n<p style=\"margin:0 0 10px;font-weight:700;color:#013366;font-size:17px\">Quick answer: do vitamins help against hair loss?<\/p>\n<p style=\"margin:0 0 10px;color:#2e3033;font-size:15px;line-height:1.6\">Vitamins for hair loss only work when a deficiency confirmed in a blood test is the cause. The most common hair-relevant shortfalls are iron deficiency (ferritin), vitamin D deficiency and zinc deficiency. With genetic (androgenetic) hair loss, supplements do not touch the underlying mechanism of DHT and predisposition.<\/p>\n<p style=\"margin:0 0 12px;color:#2e3033;font-size:15px;line-height:1.6\">Measure first, then take: a blood test decides whether vitamins make sense. Once a deficiency is corrected, the first improvements usually show after 3 to 6 months, the full picture after 6 to 12 months. Biotin without a deficiency has no proven benefit and can even skew lab results.<\/p>\n<ul style=\"margin:0;padding-left:0;list-style:none\">\n<li style=\"margin:0 0 8px;padding-left:26px;position:relative;color:#013366;font-size:15px;line-height:1.5\"><span style=\"position:absolute;left:0;color:#0079F1;font-weight:700\">&#10003;<\/span><strong>A blood test decides:<\/strong> measure first, then take.<\/li>\n<li style=\"margin:0 0 8px;padding-left:26px;position:relative;color:#013366;font-size:15px;line-height:1.5\"><span style=\"position:absolute;left:0;color:#0079F1;font-weight:700\">&#10003;<\/span><strong>Most common shortfalls:<\/strong> iron\/ferritin, vitamin D, zinc.<\/li>\n<li style=\"margin:0;padding-left:26px;position:relative;color:#013366;font-size:15px;line-height:1.5\"><span style=\"position:absolute;left:0;color:#0079F1;font-weight:700\">&#10003;<\/span><strong>Biotin without a deficiency<\/strong> does nothing and skews lab results.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Can vitamins really stop hair loss?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamins can slow hair loss or bring it to a halt, but only when a confirmed nutrient deficiency is the cause. In healthy people without a shortfall, the review by Almohanna et al. (2019, Dermatol Ther) found no proven benefit. There, micronutrients are described as a modifiable risk factor, not a cure-all.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The reason lies in the hair cycle. Every hair goes through a growth phase (anagen, 2 to 7 years), a short transition phase (catagen, 2 to 3 weeks) and a resting phase (telogen, around 3 months), at the end of which it sheds. More on this in the article on the <a href=\"\/uk\/blog\/hair-growth-cycle\/\">hair growth cycle<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Inside the hair follicle, keratinocytes divide very quickly, one of the most metabolically active cell types in the body. When building blocks such as iron, zinc or B vitamins are missing, the body pushes follicles into the telogen phase early. The result is diffuse hair loss across the whole scalp that typically only becomes visible 2 to 4 months after the trigger.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\" style=\"max-width:720px;margin-left:auto;margin-right:auto\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/person_spiegel.png\" alt=\"Woman thoughtfully examining her hairline and parting in the mirror\" class=\"wp-image-95925\" style=\"width:720px;max-width:100%;height:auto\" srcset=\"https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/person_spiegel.png 1536w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/person_spiegel-300x200.png 300w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/person_spiegel-1024x683.png 1024w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/person_spiegel-768x512.png 768w\" sizes=\"(max-width: 767px) 100vw, 660px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">This so-called telogen effluvium is reversible once the cause is fixed. The current systematic review by Wang et al. (2024, Mol Nutr Food Res) reaches a clear conclusion, though: without an accompanying deficiency, the evidence for any benefit from supplements is inconsistent. The decisive step therefore remains the blood test, not reaching for the pill box.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The most important vitamins and nutrients for your hair<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In hair loss, iron, vitamin D and zinc matter most, followed by biotin, vitamin B12, folate, vitamin A, vitamin C, vitamin E, selenium, omega-3 and protein. Each of these nutrients has a clear role in the follicle, a typical deficiency sign in the hair and a daily requirement. The evidence check below ranks the most important ones first, then the matrix sums up all twelve at a glance.<\/p>\n\n\n\n<div style=\"border:1px solid #e3e8ef;border-radius:14px;overflow:hidden;margin:8px 0 32px;background:#fff\">\n<div style=\"background:#013366;color:#fff;padding:15px 18px;font-weight:700;font-size:17px\">Nutrients in the evidence check: what really helps your hair<\/div>\n<div style=\"padding:6px 18px 4px\">\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:14px 0;border-bottom:1px solid #eef2f7\">\n<div style=\"flex:0 0 170px;font-weight:600;color:#013366\">Iron (ferritin)<\/div>\n<div style=\"flex:0 0 120px;display:flex;gap:4px\" aria-hidden=\"true\"><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><\/div>\n<div style=\"flex:0 0 150px;font-weight:700;color:#0a8a3f\">Proven with deficiency<\/div>\n<div style=\"flex:1 1 220px;color:#2e3033;font-size:14.5px\">Most common hair-relevant deficiency, especially in women; the stored value, ferritin, decides (DGE 16 mg\/women, 11 mg\/men)<\/div>\n<\/div>\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:14px 0;border-bottom:1px solid #eef2f7\">\n<div style=\"flex:0 0 170px;font-weight:600;color:#013366\">Vitamin D<\/div>\n<div style=\"flex:0 0 120px;display:flex;gap:4px\" aria-hidden=\"true\"><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><\/div>\n<div style=\"flex:0 0 150px;font-weight:700;color:#0a8a3f\">Proven with deficiency<\/div>\n<div style=\"flex:1 1 220px;color:#2e3033;font-size:14.5px\">Deficiency in around half of those affected; 57 to 60% of the population below the target value (RKI), DGE 20 \u00b5g\/day<\/div>\n<\/div>\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:14px 0;border-bottom:1px solid #eef2f7\">\n<div style=\"flex:0 0 170px;font-weight:600;color:#013366\">Zinc<\/div>\n<div style=\"flex:0 0 120px;display:flex;gap:4px\" aria-hidden=\"true\"><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><\/div>\n<div style=\"flex:0 0 150px;font-weight:700;color:#0079F1\">Relevant in risk groups<\/div>\n<div style=\"flex:1 1 220px;color:#2e3033;font-size:14.5px\">Only a minimal serum difference in a study of 23,975 patients; mainly important in vegans and malabsorption<\/div>\n<\/div>\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:14px 0;border-bottom:1px solid #eef2f7\">\n<div style=\"flex:0 0 170px;font-weight:600;color:#013366\">Biotin<\/div>\n<div style=\"flex:0 0 120px;display:flex;gap:4px\" aria-hidden=\"true\"><span style=\"flex:1;height:11px;border-radius:3px;background:#cdd5df\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><\/div>\n<div style=\"flex:0 0 150px;font-weight:700;color:#9aa3b1\">No proof without deficiency<\/div>\n<div style=\"flex:1 1 220px;color:#2e3033;font-size:14.5px\">Double-blind study with no difference from placebo (Yelich 2024); deficiency on a mixed diet extremely rare, DGE 40 \u00b5g\/day<\/div>\n<\/div>\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:14px 0;border-bottom:1px solid #eef2f7\">\n<div style=\"flex:0 0 170px;font-weight:600;color:#013366\">Vitamin C<\/div>\n<div style=\"flex:0 0 120px;display:flex;gap:4px\" aria-hidden=\"true\"><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#0079F1\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><\/div>\n<div style=\"flex:0 0 150px;font-weight:700;color:#0079F1\">Supportive (iron)<\/div>\n<div style=\"flex:1 1 220px;color:#2e3033;font-size:14.5px\">Raises the absorption of plant-based iron 2 to 3 fold; no isolated growth proof, DGE 95 to 110 mg\/day<\/div>\n<\/div>\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:14px 0\">\n<div style=\"flex:0 0 170px;font-weight:600;color:#013366\">Vitamin A &amp; selenium (overdose)<\/div>\n<div style=\"flex:0 0 120px;display:flex;gap:4px\" aria-hidden=\"true\"><span style=\"flex:1;height:11px;border-radius:3px;background:#c0392b\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><span style=\"flex:1;height:11px;border-radius:3px;background:#e3e8ef\"><\/span><\/div>\n<div style=\"flex:0 0 150px;font-weight:700;color:#c0392b\">Can do harm<\/div>\n<div style=\"flex:1 1 220px;color:#2e3033;font-size:14.5px\">In overdose a trigger of hair loss themselves: vitamin A above 3,000 \u00b5g\/day, selenium above 300 \u00b5g\/day (EFSA)<\/div>\n<\/div>\n<\/div>\n<div style=\"padding:11px 18px;background:#f7fafd;color:#5a6b7b;font-size:12.5px;border-top:1px solid #eef2f7\">Rating based on the evidence in hair loss (5 = strong, proven benefit). Effect only with an actual deficiency. All details in the matrix below.<\/div>\n<\/div>\n\n\n\n<div style=\"overflow-x:auto;margin-bottom:8px\">\n<table style=\"min-width:760px;width:100%;border-collapse:collapse;font-size:14.5px\" class=\"mc-compare\">\n<thead>\n<tr style=\"background:#013366;color:#fff\">\n<th style=\"padding:10px;text-align:left\">Nutrient<\/th>\n<th style=\"padding:10px;text-align:left\">Role for the hair<\/th>\n<th style=\"padding:10px;text-align:left\">Deficiency sign in the hair<\/th>\n<th style=\"padding:10px;text-align:left\">Daily requirement<\/th>\n<th style=\"padding:10px;text-align:left\">Top foods<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Iron (ferritin)<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Cofactor of DNA synthesis in the follicle; the body prioritises blood over hair<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Diffuse thinning, &gt;100 hairs\/day, dull lustre<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">Women 16 mg, men 11 mg (DGE 2024)<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Beef liver (15 mg\/100 g), lentils, pumpkin seeds<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin D<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Steers follicle reactivation via the VDR receptor<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Diffuse thinning, slowed growth<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">20 \u00b5g\/day (800 IU)<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Wild salmon, herring, egg yolk (sun is the main source)<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Zinc<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Cofactor for &gt;300 enzymes, keratin and sebaceous gland function<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Dull hair, diffuse thinning<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">Men around 14 mg, women around 8 mg<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Oysters, beef, pumpkin seeds<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Biotin (B7)<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Cofactor for keratin formation; requirement is very small<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Brittle hair (deficiency extremely rare)<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">40 \u00b5g\/day<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Liver, cooked eggs, mushrooms<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin B12<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">DNA synthesis and cell division in the follicle<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Diffuse thinning, often with anaemia<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">4 \u00b5g\/day<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Liver, mackerel, Gouda<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Folate (B9)<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Cofactor for cell division and blood formation<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Diffuse hair loss, brittle nails<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">300 \u00b5g folate equivalents<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Liver, kale, lentils<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin A<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Regulates epithelial cells; an excess is harmful<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Both deficiency AND overdose cause hair loss<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">Women 700 \u00b5g, men 850 \u00b5g (UL 3,000 \u00b5g)<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Carrots, sweet potatoes (beta-carotene, safe)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin C<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Collagen synthesis, improves iron absorption<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Corkscrew hairs in scurvy, hair breakage<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">Women 95 mg, men 110 mg<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Peppers, broccoli, citrus fruit<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin E<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Antioxidant, protects cell membranes in the follicle<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Rare; deficiency brings oxidative stress, hair breakage<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">Women 12 mg, men 15 mg<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Sunflower oil, almonds, avocado<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Selenium<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Antioxidant protection, thyroid and keratin function<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Both deficiency AND overdose (selenosis) cause hair loss<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">Women 60 \u00b5g, men 70 \u00b5g (UL 300 \u00b5g)<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Brazil nuts (highly variable), tuna, eggs<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Omega-3<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Membrane building block, anti-inflammatory<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Dry, brittle hair, scalp inflammation<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">250 mg EPA + DHA\/day (EFSA)<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Wild salmon, herring, flaxseed<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Protein<\/td>\n<td style=\"padding:10px\" data-label=\"Role for the hair\">Hair is around 95% the protein keratin<\/td>\n<td style=\"padding:10px\" data-label=\"Deficiency sign in the hair\">Heavy thinning (up to 300 hairs\/day)<\/td>\n<td style=\"padding:10px\" data-label=\"Daily requirement\">0.8 g\/kg body weight (min. 40 to 60 g)<\/td>\n<td style=\"padding:10px\" data-label=\"Top foods\">Chicken breast, eggs, lentils<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size:12.5px;color:#6b7280;margin:6px 0 0\">Daily requirements based on the reference values of the German Nutrition Society (DGE), as of 2024. UL = tolerable upper limit (EFSA).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Iron is the most common hair-relevant deficiency in women<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Iron is a cofactor of ribonucleotide reductase and therefore indispensable for the DNA synthesis of follicular keratinocytes. When iron is short, the body prioritises haemoglobin and pushes hair follicles into the resting phase early. Women of childbearing age are particularly often under-supplied, according to the DGE and the German National Nutrition Survey II.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\" style=\"max-width:560px;margin-left:auto;margin-right:auto\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/follikel_versorgung.png\" alt=\"Scientific illustration of a hair follicle in cross-section of the skin being supplied with nutrients through a blood vessel\" class=\"wp-image-95926\" style=\"width:560px;max-width:100%;height:auto\" srcset=\"https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/follikel_versorgung.png 1536w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/follikel_versorgung-300x200.png 300w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/follikel_versorgung-1024x683.png 1024w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/follikel_versorgung-768x512.png 768w\" sizes=\"(max-width: 767px) 100vw, 660px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Rushton (2002, Int J Dermatol) found markedly lower ferritin in women with chronic telogen effluvium than in controls. What counts is the stored value, ferritin, not just haemoglobin. In certain life stages the nutrient demand shifts in particular: after childbirth (postpartum hair loss) and during menopause, iron and hormone levels change, and here a targeted blood check is especially worthwhile. More on the diagnostics in the article on <a href=\"\/uk\/blog\/iron-deficiency-hair-loss\/\">iron deficiency and hair loss<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vitamin D is short in more than half of those affected<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin D works through the vitamin D receptor (VDR), which sits in the hair follicle and helps steer the reactivation of new growth cycles. A 2024 meta-analysis (PMC11479915) found a vitamin D deficiency in 50.4% of women with hair loss and 53.5% of patients with telogen effluvium.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The DGE recommends 20 \u00b5g per day (800 IU) when no own production through the skin takes place. Since diet only supplies 2 to 4 \u00b5g and, according to the RKI, around 57 to 60% of the population do not reach the target value, vitamin D is one of the few nutrients where supplementation guided by a blood value is often justified.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Zinc, B12, folate and protein in risk groups<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Zinc is a cofactor for over 300 enzymes and needed for keratin formation. A study of 23,975 patients, however, showed only a minimal difference in serum zinc (96 versus 99 \u00b5g\/dl), which is why a blanket zinc measurement in hair loss is not recommended. Zinc is mainly relevant in vegans and people with malabsorption.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin B12 and folate drive cell division in the follicle. Vegans almost certainly develop a B12 deficiency without a supplement. Protein is the foundation: hair is around 95% keratin, and severe deficiency states after crash diets or operations trigger a well-documented telogen effluvium that is reversible once levels return to normal.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vitamin A, C, E, selenium and omega-3: benefits and limits<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin C mainly improves iron absorption by reducing Fe3+ to the absorbable form Fe2+. For vitamin E, a small RCT by Beoy et al. (2010) with 38 men on tocotrienols showed 34% more hair after 8 months, though it needs replication. For omega-3, Ablon (2015) found more anagen hairs in 120 women, but as a multi-ingredient product.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With vitamin A and selenium, caution is the key word. Both cause hair loss in deficiency as well as in overdose. Anyone who supplements these blindly risks the very symptom they are trying to fight. Details on this in the section on supplement risks further down.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The biotin myth: why the much-marketed hair vitamin usually does nothing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Biotin is seen as the hair vitamin par excellence, yet for the vast majority of people, biotin supplementation against hair loss does nothing. The reason: a true biotin deficiency is extremely rare on a mixed diet. The average intake (women 40 \u00b5g, men 46 \u00b5g) already fully covers the daily requirement of 40 \u00b5g.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The DGE puts it plainly: since there is no widespread deficiency in the population, no general recommendation for biotin supplements can be made. Yelich et al. (2024, JCAD) reviewed the evidence. The highest-quality, double-blind placebo-controlled study found no difference between biotin and placebo in hair growth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">FDA warning: biotin skews important lab results<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The US authority, the FDA, explicitly warned against biotin supplements in 2019 because they skew lab results. Many immunoassays use the biotin-streptavidin bond. Ingested biotin competes with it and can make results falsely high or falsely low. Hair-skin-nail products often contain 5 to 20 mg of biotin, 125 to 500 times the daily requirement.<\/p>\n\n\n\n<div style=\"border:1px solid #f0c9c9;border-left:5px solid #c0392b;background:#fdf3f2;border-radius:10px;padding:16px 20px;margin:8px 0 12px\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#922b21;font-size:15px\">Important: which tests biotin skews<\/p>\n<p style=\"margin:0;color:#2e3033;font-size:14.5px;line-height:1.6\">Affected tests include the <strong>troponin test<\/strong> (a heart attack marker that can appear falsely low; the FDA documented one death from a missed diagnosis), the <strong>thyroid values<\/strong> TSH, T3 and T4, as well as hCG, vitamin D and hormone tests. The FDA recommends pausing biotin at least 72 hours before a blood draw and informing both your doctor and the lab.<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">For hair loss, this creates a double problem: high-dose biotin offers no benefit without a deficiency and can at the same time disturb the very diagnostics meant to uncover the true cause. Anyone having their blood values checked should stop biotin products beforehand.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can supplements actually make hair loss worse?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, supplements can make hair loss worse when taken without a deficiency and in doses that are too high. Vitamin A and selenium cause hair loss in overdose, and long-term zinc intake without copper balance can lead to hair loss indirectly via a copper deficiency. The &#8220;more helps more&#8221; idea is simply wrong here.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin A is fat-soluble and accumulates in the liver. The WHO explicitly lists alopecia as a symptom of hypervitaminosis A. Excess retinol speeds up the follicle cycle and drives hairs prematurely into the telogen phase. It becomes critical with the combination of retinol supplements, frequent liver consumption and fortified foods above the upper limit of 3,000 \u00b5g per day (EFSA). Beta-carotene from plants, by contrast, is safe because the body controls the conversion according to need.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With selenium, the toxic window is narrow: the requirement is 60 to 70 \u00b5g, the upper limit 300 \u00b5g per day (EFSA). Selenium poisoning (selenosis) often shows diffuse hair loss as the first sign. The most common source is Brazil nuts, which depending on origin contain 10 to 70 \u00b5g each. Civas et al. (2024, J Cosmet Dermatol) documented a case of hair loss and nail dystrophy caused by a selenium supplement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Zinc without copper: the underrated trigger<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Long-term zinc supplementation without copper balance depletes the copper stores. In the gut lining, zinc induces metallothionein, which binds copper and blocks its absorption. The result is a copper deficiency with anaemia, and this anaemia can in turn trigger hair loss. Several case reports (PMC12286130, PMC10510946) confirm this mechanism.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The practical consequence: anyone taking more than 15 to 20 mg of zinc per day long-term should add around 1 to 2 mg of copper. As a general rule, the fat-soluble vitamins A, D, E and K accumulate in the body and form a cumulative risk in combined products. The rule is: measure first, then take.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">When and how should you take hair vitamins?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When taking vitamins against hair loss, timing decides the effect, because individual nutrients block or boost each other. Iron does not belong with calcium, coffee or zinc, vitamin D needs fat, and vitamin C is what makes iron properly available in the first place. The collision and synergy checker below shows the most important interactions at a glance.<\/p>\n\n\n\n<div style=\"overflow-x:auto;margin-bottom:8px\">\n<table style=\"min-width:700px;width:100%;border-collapse:collapse;font-size:14.5px\" class=\"mc-compare\">\n<thead>\n<tr style=\"background:#013366;color:#fff\">\n<th style=\"padding:10px;text-align:left\">Nutrient<\/th>\n<th style=\"padding:10px;text-align:left\">Blocked by<\/th>\n<th style=\"padding:10px;text-align:left\">Boosted by<\/th>\n<th style=\"padding:10px;text-align:left\">Practical intake<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Iron<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\"><span style=\"color:#c0392b\">\u2717<\/span> Calcium\/milk, coffee &amp; black tea (up to 50 to 80% inhibition), high zinc doses, acid blockers<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\"><span style=\"color:#1e8449\">\u2713<\/span> Vitamin C (100 to 200 mg raise absorption 2 to 3 fold)<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">On an empty stomach or with orange juice; at least 1 hr away from coffee\/milk<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Zinc<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\"><span style=\"color:#c0392b\">\u2717<\/span> high iron doses (competition at the DMT1 transporter)<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\">\u2013<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">With long-term use &gt;15 to 20 mg: add copper (1 to 2 mg)<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin C<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\">\u2013<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\"><span style=\"color:#1e8449\">\u2713<\/span> acts as an iron booster itself<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">Take together with plant-based iron<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin D (fat-soluble)<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\"><span style=\"color:#c0392b\">\u2717<\/span> taking it on an empty stomach lowers absorption<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\"><span style=\"color:#1e8449\">\u2713<\/span> dietary fat; K2 (MK-7) discussed at higher doses<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">With a fat-containing meal (breakfast\/lunch)<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Vitamin A, E, K (fat-soluble)<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\"><span style=\"color:#c0392b\">\u2717<\/span> they accumulate, overdose risk (especially A)<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\"><span style=\"color:#1e8449\">\u2713<\/span> dietary fat improves absorption<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">With a meal; A and D not long-term high-dose without a doctor<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Biotin<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\">\u2013<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\">\u2013<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">Stop at least 72 hrs before a blood draw (FDA)<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Omega-3<\/td>\n<td style=\"padding:10px\" data-label=\"Blocked by\">\u2013<\/td>\n<td style=\"padding:10px\" data-label=\"Boosted by\">\u2013<\/td>\n<td style=\"padding:10px\" data-label=\"Practical intake\">On blood thinners (&gt;3 g\/day) ask your doctor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size:12.5px;color:#6b7280;margin:6px 0 0\"><span style=\"color:#1e8449\">&#10003;<\/span> boosts absorption &nbsp;|&nbsp; <span style=\"color:#c0392b\">&#10007;<\/span> blocks absorption. Figures for oral intake with a confirmed deficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The practical classic: take an iron tablet with a glass of orange juice instead of a milky coffee. The coffee at breakfast halves iron absorption, the vitamin C boost doubles it. With fat-soluble vitamins the opposite applies: they need fat in the meal but accumulate, and they tolerate no long-term high dose without medical supervision.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Spotting a vitamin deficiency: which blood values in hair loss?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To spot a vitamin deficiency as a cause of hair loss, ferritin, 25-OH vitamin D, a full blood count and the TSH value are the most useful, complemented by zinc, B12 (holotranscobalamin) and CRP. Every GP can cover these values. You can take the printable checklist below along to your appointment. There is also more background in our article on <a href=\"\/uk\/blog\/hair-loss-blood-test\/\">blood tests for hair loss<\/a>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\" style=\"max-width:720px;margin-left:auto;margin-right:auto\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/blutabnahme_labor.png\" alt=\"Blood collection tubes in a rack symbolising a blood test for suspected nutrient deficiency\" class=\"wp-image-95927\" style=\"width:720px;max-width:100%;height:auto\" srcset=\"https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/blutabnahme_labor.png 1536w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/blutabnahme_labor-300x200.png 300w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/blutabnahme_labor-1024x683.png 1024w, https:\/\/elithair.com\/uk\/wp-content\/uploads\/sites\/3\/2026\/06\/blutabnahme_labor-768x512.png 768w\" sizes=\"(max-width: 767px) 100vw, 660px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"border:1px solid #cfe0f5;border-radius:12px;padding:20px 22px;margin:8px 0 14px;background:#fff\">\n<p style=\"margin:0 0 4px;font-weight:700;color:#013366;font-size:17px\">Blood values checklist for your appointment<\/p>\n<p style=\"margin:0 0 16px;color:#6b7280;font-size:13px\">To print out or photograph. The target ranges are a rough guide, not a substitute for a diagnosis. Note: stop biotin products 72 hrs before the blood draw.<\/p>\n<div style=\"overflow-x:auto\">\n<table style=\"min-width:620px;width:100%;border-collapse:collapse;font-size:14.5px\" class=\"mc-compare\">\n<thead>\n<tr style=\"background:#013366;color:#fff\">\n<th style=\"padding:9px;text-align:left\">\u2610 Value<\/th>\n<th style=\"padding:9px;text-align:left\">What it shows<\/th>\n<th style=\"padding:9px;text-align:left\">Rough guide<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 Ferritin<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">Iron stores (better than serum iron)<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">Lab normal from 12 to 30 \u00b5g\/l; a higher range is discussed for the hair (see note)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 25-OH vitamin D<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">Vitamin D status<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">Sufficient from 50 nmol\/l (20 ng\/ml); deficiency below 30 nmol\/l<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 Full blood count<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">Anaemia, general blood picture<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">Lab-dependent reference<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 TSH<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">Thyroid (often overlooked)<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">around 0.4 to 4.0 mU\/l (lab-dependent)<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 CRP<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">Inflammation (skews ferritin upwards)<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">always together with ferritin<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 Zinc (optional)<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">only shows severe deficiencies<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">around 70 to 120 \u00b5g\/dl (serum unreliable, whole-blood analysis more informative)<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 B12 \/ Holo-TC<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">active B12, more sensitive than total B12<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">Holo-TC around 37.5 to 188 pmol\/l (lab-dependent)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:9px;font-weight:600;color:#013366\">\u2610 Folate (optional)<\/td>\n<td style=\"padding:9px\" data-label=\"What it shows\">cell division, blood formation<\/td>\n<td style=\"padding:9px\" data-label=\"Rough guide\">lab-dependent reference<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin:14px 0 0;color:#2e3033;font-size:13.5px;line-height:1.6;background:#f3f8ff;border-radius:8px;padding:12px 14px\"><strong>Note on ferritin (YMYL):<\/strong> guidelines often define an iron deficiency only below 30 \u00b5g\/l. Part of the hair-focused medical field names target values of around 40 to 70 \u00b5g\/l for hair growth, and some authors such as Rushton (2002) even above 70 \u00b5g\/l. These higher thresholds are not conclusively established scientifically and are not set down as a consensus in the guidelines. Interpreting your values belongs in medical hands.<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Two values are especially tricky. Ferritin is an acute-phase protein and rises falsely high during inflammation, which is why CRP should always be measured alongside it. And serum zinc only reflects severe deficiencies, because around 99% of the body&#8217;s zinc lies inside the cells. A normal zinc value therefore does not reliably rule out a mild deficiency.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Supplement reality check: what do hair-vitamin products really do?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hair-vitamin products only do something when they correct a deficiency that genuinely exists. Without a shortfall, no benefit is to be expected. A 2025 systematic review (PMC13063204) found mixed results for oral hair supplements with often low study quality. The market for such products runs into the billions; the evidence does not keep pace with it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typical combined products contain biotin (often 5 to 10 mg, far above requirement), zinc, selenium, B vitamins and collagen peptides. That makes assessment difficult: if any component works at all, it stays unclear which one. And with selenium or vitamin A in too high a dose, the product can even do harm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One particular trend is hair gummies (often marketed as &#8220;bears&#8221;). They are usually heavily overpriced, contain a lot of sugar and almost always rely on the biotin principle in their formula, which brings no proven benefit without a confirmed deficiency. A pretty gummy bear changes nothing about this basic rule: what is not missing in the blood cannot be topped up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Supplements make sense with a deficiency confirmed in the blood and for clear risk groups: vegans (B12, iron, zinc), pregnant women, older people with malabsorption and people after a heavily reduced diet or surgery. For everyone else the rule is: the money is better spent on a balanced diet than on a capsule taken on suspicion.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Food over pills: the hair plate<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A balanced diet covers nearly all hair-relevant nutrients and is superior to supplements in healthy people. A Mediterranean diet of fish, pulses, olive oil and vegetables supplies iron, zinc, omega-3, B vitamins and protein in a balanced form. These are exactly the food groups shown by the hair plate in the infographic below.<\/p>\n\n\n\n<div style=\"border:1px solid #e3e8ef;border-radius:14px;padding:22px 22px 16px;margin:8px 0 14px;background:#fff\">\n<p style=\"margin:0 0 4px;font-weight:700;color:#013366;font-size:19px;text-align:center\">The hair plate: eat nutrient-rich<\/p>\n<p style=\"margin:0 0 18px;color:#6b7280;font-size:13px;text-align:center\">Six hair-relevant nutrients and the best foods for each<\/p>\n<div style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px\">\n<div style=\"border:1px solid #e3e8ef;border-top:4px solid #0079F1;border-radius:10px;padding:14px 16px;background:#f7faff\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#013366;font-size:16px\">Iron<\/p>\n<ul style=\"margin:0;padding:0;list-style:none;color:#2e3033;font-size:14.5px;line-height:1.7\">\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Lentils<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Spinach<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Red meat<\/li>\n<\/ul>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-top:4px solid #0079F1;border-radius:10px;padding:14px 16px;background:#f7faff\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#013366;font-size:16px\">Vitamin D<\/p>\n<ul style=\"margin:0;padding:0;list-style:none;color:#2e3033;font-size:14.5px;line-height:1.7\">\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Salmon<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Herring<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Egg<\/li>\n<\/ul>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-top:4px solid #0079F1;border-radius:10px;padding:14px 16px;background:#f7faff\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#013366;font-size:16px\">Zinc<\/p>\n<ul style=\"margin:0;padding:0;list-style:none;color:#2e3033;font-size:14.5px;line-height:1.7\">\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Pumpkin seeds<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Oysters<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Beef<\/li>\n<\/ul>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-top:4px solid #0079F1;border-radius:10px;padding:14px 16px;background:#f7faff\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#013366;font-size:16px\">Biotin<\/p>\n<ul style=\"margin:0;padding:0;list-style:none;color:#2e3033;font-size:14.5px;line-height:1.7\">\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Liver<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Eggs<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Nuts<\/li>\n<\/ul>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-top:4px solid #0079F1;border-radius:10px;padding:14px 16px;background:#f7faff\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#013366;font-size:16px\">Protein<\/p>\n<ul style=\"margin:0;padding:0;list-style:none;color:#2e3033;font-size:14.5px;line-height:1.7\">\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Fish<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Eggs<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Pulses<\/li>\n<\/ul>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-top:4px solid #0079F1;border-radius:10px;padding:14px 16px;background:#f7faff\">\n<p style=\"margin:0 0 8px;font-weight:700;color:#013366;font-size:16px\">Omega-3<\/p>\n<ul style=\"margin:0;padding:0;list-style:none;color:#2e3033;font-size:14.5px;line-height:1.7\">\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Salmon<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Herring<\/li>\n<li style=\"padding-left:18px;position:relative\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Flaxseed<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p style=\"margin:16px 0 0;color:#6b7280;font-size:12.5px;text-align:center\">A balanced mixed diet usually covers these nutrients fully in healthy people.<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A few combinations are particularly worthwhile. Plant-based iron from lentils or spinach is absorbed much better with a vitamin C source such as peppers. Eggs should be eaten cooked rather than raw, because raw egg white contains avidin, which binds biotin. And fish twice a week covers the omega-3 requirement without a capsule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most common diet-related triggers for hair loss are crash diets, an abrupt switch to a vegan diet without planning and a very low-protein diet. In all three cases the diffuse hair loss appears with the typical lag of 2 to 4 months and reverses after a return to a balanced diet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Regrowth timeline: how long does it take after correcting the deficiency?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">After correcting a nutrient deficiency, because of the hair cycle it takes 3 to 6 months until visible improvements show, with the full picture setting in after 6 to 12 months. Worth knowing: in the first weeks the hair often keeps shedding, even though the blood values are already normalising. This phase is normal and no sign that the therapy is failing.<\/p>\n\n\n\n<div style=\"border:1px solid #e3e8ef;border-radius:14px;padding:22px;margin:8px 0 14px;background:#fff\">\n<p style=\"margin:0 0 18px;font-weight:700;color:#013366;font-size:18px;text-align:center\">The hair cycle in three phases<\/p>\n<div style=\"display:flex;flex-wrap:wrap;align-items:stretch;justify-content:center;gap:10px\">\n<div style=\"flex:1 1 200px;min-width:180px;border:1px solid #cfe0f5;border-radius:10px;padding:16px;background:#f3f8ff;text-align:center\">\n<p style=\"margin:0 0 6px;font-weight:700;color:#013366;font-size:16px\">Anagen<\/p>\n<p style=\"margin:0;color:#2e3033;font-size:14px;line-height:1.5\">Growth<br><strong>2 to 7 years<\/strong><\/p>\n<\/div>\n<div style=\"display:flex;align-items:center;justify-content:center;color:#0079F1;font-size:26px;font-weight:700;flex:0 0 auto\">&rarr;<\/div>\n<div style=\"flex:1 1 200px;min-width:180px;border:1px solid #cfe0f5;border-radius:10px;padding:16px;background:#f3f8ff;text-align:center\">\n<p style=\"margin:0 0 6px;font-weight:700;color:#013366;font-size:16px\">Catagen<\/p>\n<p style=\"margin:0;color:#2e3033;font-size:14px;line-height:1.5\">Transition<br><strong>2 to 3 weeks<\/strong><\/p>\n<\/div>\n<div style=\"display:flex;align-items:center;justify-content:center;color:#0079F1;font-size:26px;font-weight:700;flex:0 0 auto\">&rarr;<\/div>\n<div style=\"flex:1 1 200px;min-width:180px;border:1px solid #f0c9c9;border-radius:10px;padding:16px;background:#fdf3f2;text-align:center\">\n<p style=\"margin:0 0 6px;font-weight:700;color:#922b21;font-size:16px\">Telogen<\/p>\n<p style=\"margin:0;color:#2e3033;font-size:14px;line-height:1.5\">Rest and shedding<br><strong>around 3 months<\/strong><\/p>\n<\/div>\n<\/div>\n<p style=\"margin:16px 0 0;color:#6b7280;font-size:12.5px;text-align:center\">A nutrient deficiency pushes follicles into the telogen phase early, and the hair sheds diffusely.<\/p>\n<\/div>\n\n\n\n<div style=\"overflow-x:auto;margin-bottom:8px\">\n<table style=\"min-width:620px;width:100%;border-collapse:collapse;font-size:14.5px\" class=\"mc-compare\">\n<thead>\n<tr style=\"background:#013366;color:#fff\">\n<th style=\"padding:10px;text-align:left\">Period<\/th>\n<th style=\"padding:10px;text-align:left\">What happens in the follicle<\/th>\n<th style=\"padding:10px;text-align:left\">What you notice<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Month 1 to 2<\/td>\n<td style=\"padding:10px\" data-label=\"What happens in the follicle\">Ferritin or vitamin D level normalises, follicles still resting<\/td>\n<td style=\"padding:10px\" data-label=\"What you notice\">Hair loss often continues, no visible progress<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Month 3 to 4<\/td>\n<td style=\"padding:10px\" data-label=\"What happens in the follicle\">Follicles re-enter the anagen (growth) phase<\/td>\n<td style=\"padding:10px\" data-label=\"What you notice\">Shedding slows, first fine baby hairs at the hairline<\/td>\n<\/tr>\n<tr style=\"background:#f6f9fd;border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Month 5 to 6<\/td>\n<td style=\"padding:10px\" data-label=\"What happens in the follicle\">New hairs grow longer and stronger<\/td>\n<td style=\"padding:10px\" data-label=\"What you notice\">Visibly more density, shedding usually back at 50 to 100 hairs\/day<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #e3e8ef\">\n<td style=\"padding:10px;font-weight:600;color:#013366\">Month 6 to 12<\/td>\n<td style=\"padding:10px\" data-label=\"What happens in the follicle\">Full recovery possible if no other cause is present<\/td>\n<td style=\"padding:10px\" data-label=\"What you notice\">Volume approaches the starting state<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size:12.5px;color:#6b7280;margin:6px 0 0\">Applies to deficiency-related telogen effluvium. If the shedding stays unchanged after 6 months of substitution, other causes should be investigated.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diffuse or genetic? When vitamins do not help<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamins help with diffuse, deficiency-related hair loss across the whole scalp, but not with genetic (androgenetic) hair loss. Androgenetic alopecia is by far the most common form and affects around 50% of men over 50 and about 38% of women. The cause is a hereditarily raised DHT sensitivity of the follicles, not a nutrient deficiency. More on this under androgenetic alopecia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The pattern reveals the form. Nutrient and thyroid causes produce diffuse hair loss that affects the whole scalp evenly. A receding hairline, a thinning crown or a widening parting, by contrast, point to the genetic type. And only this type responds to hair growth products such as <a href=\"\/uk\/blog\/minoxidil-hair-loss\/\">minoxidil<\/a> or to a hair transplant. The two forms often occur at the same time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The authoritative AWMF S3 guideline on androgenetic alopecia (Kanti et al., 2018) lists minoxidil and finasteride as proven therapies, but does not list nutrient supplements as a primary treatment option, though it does name correcting an existing deficiency as a supporting measure. In women it is also worth looking at hormones and hair as well as the thyroid.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is exactly where the value of a medical work-up as a filter lies: it first clarifies which type is present. The free hair analysis at Elithair is a visual pattern analysis that classifies the distribution pattern and separates genetic from diffuse hair loss. It does not replace a medical blood test for vitamin and nutrient deficiencies, but helps you judge whether a blood test or a different therapy is the sensible next step. Other causes of hair loss and hair loss in women specifically are described separately. See also our note on <a href=\"\/uk\/blog\/hair-loss-in-women\/\">hair loss in women<\/a>.<\/p>\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\" style=\"justify-content:center;margin-bottom:48px\"><div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" style=\"background-color:#0079F1;color:#ffffff;border-radius:8px;padding:15px 36px;font-weight:700;font-size:17px\" href=\"\/uk\/hair-analysis\/\">Start your free hair analysis<\/a><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">Common questions about vitamins against hair loss<\/h2>\n\n\n\n<div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:12px\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">Which vitamin is most commonly short in hair loss?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">The most common shortfalls are iron (as ferritin), vitamin D and zinc. According to the RKI, around 57 to 60% of the population do not reach the vitamin D target value, and women of childbearing age are often under-supplied with iron. A benefit only arises, though, when a deficiency is confirmed in the blood.<\/p>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:12px\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">Does biotin help against hair loss?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">No, only with a true biotin deficiency, which is extremely rare on a normal diet. A double-blind study (Yelich et al. 2024) found no difference from placebo. On top of that, high-dose biotin skews lab results such as troponin and the thyroid values according to the FDA, and should be stopped 72 hours before a blood test.<\/p>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:12px\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">How long does it take for hair to regrow after correcting the deficiency?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">First improvements usually show after 3 to 4 months, a clear recovery after around 6 months and the full picture after 6 to 12 months. In the first weeks the hair often keeps shedding, because the hair cycle needs time. This is normal and no sign of the therapy failing.<\/p>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:12px\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">Can too much vitamin A or zinc cause hair loss?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">Yes. An overdose of vitamin A (above 3,000 \u00b5g\/day of retinol, EFSA) drives follicles prematurely into the resting phase, and the WHO lists alopecia as a symptom of hypervitaminosis A. Long-term zinc intake without copper balance can trigger anaemia via a copper deficiency and therefore hair loss indirectly. Both are reversible after stopping.<\/p>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:12px\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">Vitamin D and hair loss: is there a connection?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">Yes, an association is well documented. Studies show a vitamin D deficiency in around half of those affected. The vitamin D receptor sits in the hair follicle. Causal proof is still pending, but with a confirmed deficiency, correcting it makes sense.<\/p>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:12px\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">Are foods enough or do I need tablets?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">In healthy people, a balanced Mediterranean diet is usually enough. Tablets only make sense with a deficiency confirmed in the blood or for risk groups such as vegans (B12, iron, zinc), pregnant women or older people. One exception is vitamin D, which the diet barely covers and which is often short in the population.<\/p>\n<\/div>\n<div style=\"border:1px solid #e3e8ef;border-radius:10px;padding:16px;margin-bottom:0\">\n<p style=\"color:#013366;font-weight:600;margin:0 0 6px;font-size:16px\">What time of day should I take hair vitamins?<\/p>\n<p style=\"color:#2e3033;margin:0;font-size:15px;line-height:1.6\">Iron is best on an empty stomach or with vitamin C (orange juice) and at least one hour away from coffee, tea and milk, which inhibit absorption by up to 50 to 80%. Fat-soluble vitamins such as vitamin D belong with a fat-containing meal. Pause biotin for 72 hours before a blood test.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"border:1px solid #cfe0f5;border-radius:12px;padding:20px 22px;margin:24px 0 14px;background:#f6f9fd\">\n<p style=\"margin:0 0 14px;font-weight:700;color:#013366;font-size:17px\">Scientific sources<\/p>\n<ul style=\"margin:0;padding:0;list-style:none\">\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Almohanna et al.: &#8220;The Role of Vitamins and Minerals in Hair Loss: A Review&#8221;, Dermatol Ther, 2019. <a href=\"https:\/\/link.springer.com\/article\/10.1007\/s13555-018-0278-6\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Wang et al.: &#8220;Micronutrients and Androgenetic Alopecia: A Systematic Review&#8221;, Mol Nutr Food Res, 2024. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/39440586\/\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Yelich et al.: &#8220;Biotin for Hair Loss: Teasing Out the Evidence&#8221;, JCAD, 2024. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/39148962\/\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Meta-analysis: &#8220;Vitamin D deficiency in non-scarring and scarring alopecias&#8221;, 2024 (PMC11479915). <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC11479915\/\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>Civas et al.: &#8220;Selenium in the supplement as the probable cause of hair loss and nail dystrophy&#8221;, J Cosmet Dermatol, 2024. <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/jocd.15902\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>FDA: &#8220;Biotin Interference in Troponin Lab Tests&#8221;, Safety Communication, 2019. <a href=\"https:\/\/www.fda.gov\/medical-devices\/in-vitro-diagnostics\/biotin-interference-troponin-lab-tests-assays-subject-biotin-interference\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0 0 10px;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>StatPearls \/ NCBI Bookshelf: &#8220;Vitamin A Toxicity&#8221; (NBK532916). <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK532916\/\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<li style=\"margin:0;padding-left:18px;position:relative;color:#2e3033;font-size:14px;line-height:1.55\"><span style=\"position:absolute;left:0;color:#0079F1\">&bull;<\/span>German Nutrition Society (DGE): Reference values for vitamins and minerals, as of 2024. <a href=\"https:\/\/www.dge.de\/wissenschaft\/referenzwerte\/\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/li>\n<\/ul>\n<p style=\"margin:14px 0 0;color:#6b7280;font-size:13px;line-height:1.6;border-top:1px solid #e3e8ef;padding-top:12px\"><strong>Medical disclaimer:<\/strong> this article is for information and does not replace medical advice or a diagnosis.<\/p>\n<\/div>\n\n\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Which vitamin is most commonly short in hair loss?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The most common shortfalls are iron (as ferritin), vitamin D and zinc. According to the RKI, around 57 to 60% of the population do not reach the vitamin D target value, and women of childbearing age are often under-supplied with iron. A benefit only arises, though, when a deficiency is confirmed in the blood.\"}},{\"@type\":\"Question\",\"name\":\"Does biotin help against hair loss?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, only with a true biotin deficiency, which is extremely rare on a normal diet. A double-blind study (Yelich et al. 2024) found no difference from placebo. On top of that, high-dose biotin skews lab results such as troponin and the thyroid values according to the FDA, and should be stopped 72 hours before a blood test.\"}},{\"@type\":\"Question\",\"name\":\"How long does it take for hair to regrow after correcting the deficiency?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"First improvements usually show after 3 to 4 months, a clear recovery after around 6 months and the full picture after 6 to 12 months. In the first weeks the hair often keeps shedding, because the hair cycle needs time. This is normal and no sign of the therapy failing.\"}},{\"@type\":\"Question\",\"name\":\"Can too much vitamin A or zinc cause hair loss?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. An overdose of vitamin A (above 3,000 \u00b5g\/day of retinol, EFSA) drives follicles prematurely into the resting phase, and the WHO lists alopecia as a symptom of hypervitaminosis A. Long-term zinc intake without copper balance can trigger anaemia via a copper deficiency and therefore hair loss indirectly. Both are reversible after stopping.\"}},{\"@type\":\"Question\",\"name\":\"Vitamin D and hair loss: is there a connection?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, an association is well documented. Studies show a vitamin D deficiency in around half of those affected. The vitamin D receptor sits in the hair follicle. Causal proof is still pending, but with a confirmed deficiency, correcting it makes sense.\"}},{\"@type\":\"Question\",\"name\":\"Are foods enough or do I need tablets?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In healthy people, a balanced Mediterranean diet is usually enough. Tablets only make sense with a deficiency confirmed in the blood or for risk groups such as vegans (B12, iron, zinc), pregnant women or older people. One exception is vitamin D, which the diet barely covers and which is often short in the population.\"}},{\"@type\":\"Question\",\"name\":\"What time of day should I take hair vitamins?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Iron is best on an empty stomach or with vitamin C (orange juice) and at least one hour away from coffee, tea and milk, which inhibit absorption by up to 50 to 80%. Fat-soluble vitamins such as vitamin D belong with a fat-containing meal. Pause biotin for 72 hours before a blood test.\"}}]}\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>Quick answer: do vitamins help against hair loss? Vitamins for hair loss only work when a deficiency confirmed in a blood test is the cause. The most common hair-relevant shortfalls are iron deficiency (ferritin), vitamin D deficiency and zinc deficiency. With genetic (androgenetic) hair loss, supplements do not touch the underlying mechanism of DHT and [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":95924,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_meta-robots-adv":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_opengraph-image":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","_yoast_wpseo_twitter-image":"","_hm_hreflang_map":{"de":105931,"en":96597,"uk":95928,"fr":100988,"es":91633,"it":107419,"pt":89477,"tr":82869,"x_default":96597},"_hm_language_code":"uk","footnotes":""},"categories":[18],"tags":[],"class_list":["post-95928","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-hair-loss"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Vitamins for Hair Loss: Which Nutrients Help, Dosage, Blood Values &amp; the Biotin Myth<\/title>\n<meta name=\"description\" content=\"Vitamins for hair loss only help with a confirmed deficiency. 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