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    Community 10 of 1000+

    1. Can anyone recommend a good hair vitamin for men. Just looking for something to add on my daily vitamin intake. Reddit · 24 Jul 2024
    2. Can I grow my vellus hair on my left temple longer? I've tried wild growth, castor oil, hsn vitamins, in currently on spiro Reddit · 18 Nov 2016
    3. M20 Vitamin D Deficiency and Hair Thinning Community · 14 May 2025
    4. Does vitamin D deficiency actually cause hair loss? Has anyone actually grew back hair after fixing vitamin d levels? Reddit · 19 Oct 2024
    5. Thoughts on topical vitamin C (added to shampoo, or a serum) effecting hair growth, thickness etc? Reddit · 11 Sept 2023
    6. Can low level of vitamins cause hair loss? Reddit · 19 Dec 2023
    7. 31M - major hair shedding after weight loss + stopping vitamins — help! Reddit · 18 May 2025
    8. What do people think about using a castor oil pack on thinning hair? It is ant-inflammatory has a lot of vitamins and fatty acids.. Reddit · 11 Sept 2018
    9. Vitamin D supplements causing hair loss Reddit · 22 Jun 2025
    10. Vitamin D deficiency and hair loss - does anyone have personal evidence of hair regrowth following correction? Reddit · 21 May 2026
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    Research 10 of 1000+

    1. BH12 A case of reverse ageing phenomenon of the hair secondary to vitamin B supplementation British Journal of Dermatology · 2024
    2. Serum Vitamin and Mineral Profiles in Patients with Hypothyroidism-Associated Hair Loss Global Journal of Health Science · 2026
    3. Knowledge, Attitude, and Practices Related to Vitamin D, Zinc, and Ferritin Deficiencies and the Associated Risk of Hair Loss in Jazan, Saudi Arabia Cureus · 2023
    4. How coronavirus disease 2019 vaccination affect the level of vitamin D in serum and hair? Egyptian Journal of Dermatology and Venerology · 2025
    5. The hair cycle and Vitamin D receptor Archives of Biochemistry and Biophysics · 2011 · 50 citations
    6. Dietary vitamin A regulates wingless-related MMTV integration site signaling to alter the hair cycle Experimental Biology and Medicine · 2014 · 18 citations
    7. A Non-Invasive Hair Test to Determine Vitamin D3 Levels Molecules · 2021 · 4 citations
    8. Serum levels of vitamin D3 in patients with hair loss Journal of Dermatology and Cosmetic · 2016
    9. The Vitamin D Receptor Is a Wnt Effector that Controls Hair Follicle Differentiation and Specifies Tumor Type in Adult Epidermis PloS one · 2008 · 127 citations
    10. The Vitamin D Receptor Is Required for Mouse Hair Cycle Progression but not for Maintenance of the Epidermal Stem Cell Compartment 2008 · 25 citations
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    Learn 10 of 61

    1. Biotin B vitamin, often sold as a hair supplement
    2. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement
    3. Tretinoin Vitamin A retinoid cream, prescribed for acne
    4. Mesotherapy Injections of drug or vitamin mixtures into the scalp
    5. Dexpanthenol Provitamin B5, a moisturiser in hair and skin products
    6. Metformin Diabetes drug that lowers blood sugar
    7. Neem Oil Oil from the neem tree, used in traditional remedies
    8. Hair Fibers cosmetic product that temporarily makes hair appear thicker
    9. Hair Multiplication extract, clone, and reinsert your own hair cells
    10. Hair Transplant Surgery that moves hair follicles from the back of the scalp to thinning areas
    All learn results →