{"id":3210,"date":"2023-10-25T00:00:00","date_gmt":"2023-10-25T00:00:00","guid":{"rendered":"https:\/\/resultdrivenseo.com\/fortes\/which-vitamin-deficiency-causes-hair-loss\/"},"modified":"2026-04-03T15:23:11","modified_gmt":"2026-04-03T15:23:11","slug":"which-vitamin-deficiency-causes-hair-loss","status":"publish","type":"post","link":"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/","title":{"rendered":"Which Vitamin Deficiency Causes Hair Loss"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Quick_answer_the_likely_culprits\" >Quick answer: the likely culprits<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#How_nutrition_affects_shedding\" >How nutrition affects shedding<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Iron_ferritin_a_common_driver\" >Iron (ferritin): a common driver<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Zinc_small_mineral_big_role\" >Zinc: small mineral, big role<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Vitamin_D_correct_shortfalls_dont_guess\" >Vitamin D: correct shortfalls, don\u2019t guess<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Biotin_rare_deficiency_real_lab_interference\" >Biotin: rare deficiency, real lab interference<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#When_%E2%80%9Ctoo_much%E2%80%9D_causes_hair_loss\" >When \u201ctoo much\u201d causes hair loss<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Should_you_take_a_multivitamin_%E2%80%9Cjust_in_case%E2%80%9D\" >Should you take a multivitamin \u201cjust in case\u201d?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#What_to_test_speak_to_your_GP\" >What to test (speak to your GP)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#If_tests_are_normal_what_next\" >If tests are normal, what next?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Food_first_practical_ways_to_meet_your_needs\" >Food first: practical ways to meet your needs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#FAQs\" >FAQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/resultdrivenseo.com\/fortes\/blog\/which-vitamin-deficiency-causes-hair-loss\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"334\" data-end=\"370\"><span class=\"ez-toc-section\" id=\"Quick_answer_the_likely_culprits\"><\/span>Quick answer: the likely culprits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"372\" data-end=\"926\">If you\u2019re asking which vitamin deficiency causes hair loss, iron and zinc top the list. Vitamin D can play a role for some people, while true biotin deficiency is rare. Too much of certain nutrients, such as vitamin A or selenium, can also trigger shedding. A simple set of blood tests through your GP will show what needs attention before you start supplements.<br data-start=\"738\" data-end=\"741\" \/>See background guidance from the <a class=\"decorated-link\" href=\"https:\/\/www.nhs.uk\/conditions\/hair-loss\/\" target=\"_blank\" rel=\"noopener\" data-start=\"776\" data-end=\"836\">NHS on hair loss<\/a> and <a class=\"decorated-link\" href=\"https:\/\/dermnetnz.org\/topics\/telogen-effluvium\" target=\"_blank\" rel=\"noopener\" data-start=\"845\" data-end=\"923\">DermNet on telogen effluvium<\/a>.<\/p>\n\n<ul>\n \t<li data-start=\"930\" data-end=\"1035\"><strong data-start=\"930\" data-end=\"953\">Iron (low ferritin)<\/strong> can drive diffuse shedding. Correcting low stores often reduces loss over time.<\/li>\n \t<li data-start=\"1038\" data-end=\"1105\"><strong data-start=\"1038\" data-end=\"1046\">Zinc<\/strong> supports hair cycling; deficiency can increase shedding.<\/li>\n \t<li data-start=\"1108\" data-end=\"1193\"><strong data-start=\"1108\" data-end=\"1121\">Vitamin D<\/strong> links to certain hair loss patterns; treat if tests show a shortfall.<\/li>\n \t<li data-start=\"1196\" data-end=\"1301\"><strong data-start=\"1196\" data-end=\"1206\">Biotin<\/strong> deficiency is uncommon; routine high doses are not advised and can interfere with lab tests.<\/li>\n \t<li data-start=\"1304\" data-end=\"1385\"><strong data-start=\"1304\" data-end=\"1336\">Excess vitamin A or selenium<\/strong> may cause hair loss, so avoid oversupplementing.<\/li>\n<\/ul>\n<h2 data-start=\"1387\" data-end=\"1420\"><span class=\"ez-toc-section\" id=\"How_nutrition_affects_shedding\"><\/span>How nutrition affects shedding<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1422\" data-end=\"1736\">Hair usually responds to nutritional stress with telogen effluvium, a diffuse increase in daily shedding. You\u2019ll often notice extra hair on pillows, in the shower, or when brushing. Once you correct the trigger and levels return to normal, growth tends to recover, though visible improvement can take a few months.<\/p>\n\n<h2 data-start=\"1738\" data-end=\"1773\"><span class=\"ez-toc-section\" id=\"Iron_ferritin_a_common_driver\"><\/span>Iron (ferritin): a common driver<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1775\" data-end=\"2184\">Low iron stores frequently sit behind persistent shedding, especially in people with heavy periods or restrictive diets. Ask your GP to check a full blood count and serum ferritin. Treat confirmed deficiency and recheck. Avoid taking iron \u201cjust in case\u201d, as unnecessary iron can cause problems.<br data-start=\"2073\" data-end=\"2076\" \/>Helpful overview: <a class=\"decorated-link\" href=\"https:\/\/www.nhs.uk\/conditions\/iron-deficiency-anaemia\/\" target=\"_new\" rel=\"noopener\" data-start=\"2096\" data-end=\"2181\">NHS iron deficiency anaemia<\/a>.<\/p>\n\n<h2 data-start=\"2186\" data-end=\"2218\"><span class=\"ez-toc-section\" id=\"Zinc_small_mineral_big_role\"><\/span>Zinc: small mineral, big role<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2220\" data-end=\"2463\">Zinc helps with keratin production and follicle cycling. Low levels can increase shedding and change hair quality. A clinician can arrange a serum zinc test when your history suggests risk. Correcting a proven deficiency often stabilises shedding.<\/p>\n\n<h2 data-start=\"2465\" data-end=\"2510\"><span class=\"ez-toc-section\" id=\"Vitamin_D_correct_shortfalls_dont_guess\"><\/span>Vitamin D: correct shortfalls, don\u2019t guess<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2512\" data-end=\"2729\">Research links low vitamin D with some hair loss conditions, but not everyone benefits from supplements. Test first. If your 25-hydroxyvitamin D comes back low, your GP can advise an appropriate dose and duration.<\/p>\n\n<h2 data-start=\"2731\" data-end=\"2780\"><span class=\"ez-toc-section\" id=\"Biotin_rare_deficiency_real_lab_interference\"><\/span>Biotin: rare deficiency, real lab interference<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2782\" data-end=\"3220\">True biotin deficiency is uncommon outside specific medical scenarios. High-dose biotin tablets sold for \u201chair, skin and nails\u201d can distort blood tests such as thyroid and cardiac markers. Tell your clinician if you take biotin and never start high doses without medical advice.<br data-start=\"3064\" data-end=\"3067\" \/>See <a class=\"decorated-link cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"3073\" data-end=\"3217\">MHRA biotin safety advice<\/a>.<\/p>\n\n<h2 data-start=\"3222\" data-end=\"3257\"><span class=\"ez-toc-section\" id=\"When_%E2%80%9Ctoo_much%E2%80%9D_causes_hair_loss\"><\/span>When \u201ctoo much\u201d causes hair loss<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3259\" data-end=\"3515\">Overdoing supplements can backfire. Vitamin A toxicity and selenium excess both link to hair loss. Stick to recommended intakes unless your clinician tells you otherwise. If you already take multiple products, review total intake across all labels.<\/p>\n\n<h2 data-start=\"3517\" data-end=\"3566\"><span class=\"ez-toc-section\" id=\"Should_you_take_a_multivitamin_%E2%80%9Cjust_in_case%E2%80%9D\"><\/span>Should you take a multivitamin \u201cjust in case\u201d?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3568\" data-end=\"3819\">Targeted treatment beats guesswork. Evidence for broad \u201chair vitamins\u201d remains mixed. You get the best chance of success by testing, correcting what\u2019s low, and avoiding unnecessary extras. Your GP can tailor advice to your results and medical history.<\/p>\n\n<h2 data-start=\"3821\" data-end=\"3855\"><span class=\"ez-toc-section\" id=\"What_to_test_speak_to_your_GP\"><\/span>What to test (speak to your GP)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3857\" data-end=\"3891\">A sensible work-up often includes:<\/p>\n\n<ul>\n \t<li><strong data-start=\"3895\" data-end=\"3928\">Full blood count and ferritin<\/strong><\/li>\n \t<li><strong data-start=\"3933\" data-end=\"3941\">Zinc<\/strong> (when risk or signs suggest it)<\/li>\n \t<li><strong data-start=\"3978\" data-end=\"3997\">25-OH vitamin D<\/strong><\/li>\n \t<li><strong data-start=\"4002\" data-end=\"4028\">Vitamin B12 and folate<\/strong><\/li>\n \t<li><strong data-start=\"4033\" data-end=\"4040\">TSH<\/strong> (thyroid), because thyroid imbalance commonly affects hair<\/li>\n \t<li data-start=\"4103\" data-end=\"4146\">Other tests if your history points that way<\/li>\n<\/ul>\n<p data-start=\"4148\" data-end=\"4212\">Treat to target levels and book a follow-up to confirm recovery.<\/p>\n\n<h2 data-start=\"4214\" data-end=\"4248\"><span class=\"ez-toc-section\" id=\"If_tests_are_normal_what_next\"><\/span>If tests are normal, what next?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4250\" data-end=\"4467\">Nutrition isn\u2019t always the cause. The most common alternatives are male or female pattern hair loss or telogen effluvium from illness, stress, surgery, or post-partum change. Evidence-based options can still help:<\/p>\n\n<ul>\n \t<li data-start=\"4471\" data-end=\"4610\">Minoxidil supports thickness for many people. Read more: <a class=\"decorated-link\" href=\"https:\/\/fortesclinic.co.uk\/blog\/does-minoxidil-work\/\" target=\"_new\" rel=\"noopener\" data-start=\"4532\" data-end=\"4608\">Does minoxidil work?<\/a><\/li>\n \t<li data-start=\"4613\" data-end=\"4759\">Some patients consider medical therapy after assessment: <a class=\"decorated-link\" href=\"https:\/\/fortesclinic.co.uk\/treatments\/hair-loss-medication\/\" target=\"_new\" rel=\"noopener\" data-start=\"4674\" data-end=\"4757\">Hair loss medication<\/a><\/li>\n \t<li data-start=\"4762\" data-end=\"4973\">When appropriate, surgical routes include <a class=\"decorated-link\" href=\"https:\/\/fortesclinic.co.uk\/treatments\/fue-hair-transplant\/\" target=\"_new\" rel=\"noopener\" data-start=\"4804\" data-end=\"4885\">FUE hair transplant<\/a> and <a class=\"decorated-link\" href=\"https:\/\/fortesclinic.co.uk\/treatments\/fut-hair-transplant\/\" target=\"_new\" rel=\"noopener\" data-start=\"4890\" data-end=\"4971\">FUT hair transplant<\/a><\/li>\n \t<li data-start=\"4976\" data-end=\"5084\">Not sure where to begin? Send photos or book through the <a class=\"decorated-link cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"5033\" data-end=\"5084\">contact page<\/a><\/li>\n<\/ul>\n<h2 data-start=\"5086\" data-end=\"5134\"><span class=\"ez-toc-section\" id=\"Food_first_practical_ways_to_meet_your_needs\"><\/span>Food first: practical ways to meet your needs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5136\" data-end=\"5188\">Build a plate that supports hair and overall health.<\/p>\n\n<ul>\n \t<li data-start=\"5192\" data-end=\"5287\"><strong data-start=\"5192\" data-end=\"5200\">Iron<\/strong>: lean red meat, beans, lentils; pair plant sources with vitamin C to aid absorption.<\/li>\n \t<li data-start=\"5290\" data-end=\"5349\"><strong data-start=\"5290\" data-end=\"5298\">Zinc<\/strong>: seafood, meat, dairy, nuts, seeds, wholegrains.<\/li>\n \t<li data-start=\"5352\" data-end=\"5444\"><strong data-start=\"5352\" data-end=\"5365\">Vitamin D<\/strong>: limited in food; many people need supplements in winter if levels test low.<\/li>\n \t<li data-start=\"5447\" data-end=\"5509\"><strong data-start=\"5447\" data-end=\"5458\">Protein<\/strong>: eggs, dairy, poultry, fish, tofu, tempeh, pulses.<\/li>\n<\/ul>\n<h2 data-start=\"5511\" data-end=\"5518\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5520\" data-end=\"5675\"><strong data-start=\"5520\" data-end=\"5577\">Which vitamin deficiency causes hair loss most often?<\/strong><br data-start=\"5577\" data-end=\"5580\" \/>Iron and zinc sit at the top. Vitamin D sometimes contributes. Testing confirms the real cause.<\/p>\n<p data-start=\"5677\" data-end=\"5828\"><strong data-start=\"5677\" data-end=\"5719\">Will a multivitamin stop my hair loss?<\/strong><br data-start=\"5719\" data-end=\"5722\" \/>Not if you lack nutrients. Evidence for general \u201chair vitamins\u201d is limited. Target proven deficiencies.<\/p>\n<p data-start=\"5830\" data-end=\"5964\"><strong data-start=\"5830\" data-end=\"5858\">Is biotin good for hair?<\/strong><br data-start=\"5858\" data-end=\"5861\" \/>Only if you\u2019re truly deficient. High doses can skew blood results, so tell your clinician before tests.<\/p>\n<p data-start=\"5966\" data-end=\"6089\"><strong data-start=\"5966\" data-end=\"6008\">Can too many vitamins cause hair loss?<\/strong><br data-start=\"6008\" data-end=\"6011\" \/>Yes. Too much vitamin A or selenium may trigger shedding. Keep to safe limits.<\/p>\n<p data-start=\"6091\" data-end=\"6240\"><strong data-start=\"6091\" data-end=\"6144\">How long until shedding improves after treatment?<\/strong><br data-start=\"6144\" data-end=\"6147\" \/>Hair cycles slowly. Expect several months after levels normalise before you see a difference.<\/p>\n\n<h2 data-start=\"6242\" data-end=\"6252\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6254\" data-end=\"6589\">When people ask which vitamin deficiency causes hair loss, iron and zinc stand out, with vitamin D relevant in some cases. Biotin deficiency is uncommon, and oversupplementing vitamin A or selenium can make shedding worse. Test first, treat what\u2019s low, and consider evidence-based hair treatments if nutrition isn\u2019t the root cause.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quick answer: the likely culprits If you\u2019re asking which vitamin deficiency causes hair loss, iron and zinc top the list. Vitamin D can play a role for some people, while true biotin deficiency is rare. Too much of certain nutrients, such as vitamin A or selenium, can also trigger shedding. A simple set of blood [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":2822,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-3210","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hair-loss"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Which Vitamin Deficiency Causes Hair Loss - Fortes Clinic<\/title>\n<meta name=\"description\" content=\"Which vitamin deficiency causes hair loss? Often iron or zinc, sometimes vitamin D. 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