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    Learn 3 of 26

    1. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement
    2. Calcium D oantothenate
    3. Biotin B vitamin, often sold as a hair supplement
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    Research 10 of 1000+

    1. Estimated serum vitamin D status, vitamin D intake, and risk of incident alopecia areata among US women Archives of Dermatological Research · 2016 · 23 citations
    2. Incidence of Vitamin D Deficiency in Patients with Female Pattern Hair Loss (FPHL) Journal of pharmaceutical research international · 2021
    3. Polycystic Ovary Syndrome (PCOS) and Other Androgen Excess–Related Conditions: Can Changes in Dietary Intake Make a Difference? Nutrition in Clinical Practice · 2008 · 48 citations
    4. A novel LC-MS/MS analysis of vitamin D metabolites in mice serum and hair: impact of diet and light exposure Frontiers in Endocrinology · 2025 · 1 citations
    5. Knowledge, Prevalence, and Consequences of Dietary Supplements Intake among Iranian Bodybuilders Current Developments in Nutrition · 2024 · 2 citations
    6. Clinical Evaluation of Pleurotus florida (White Oyster Mushroom) – Chatraka in the management of Vitamin D deficiency International Journal of Ayurvedic Medicine · 2023
    7. Feeding the skin: The emerging role of nutritional intervention in dermatological disorders 2026
    8. Vitamin D and the Skin: A Review for Dermatologists Actas Dermo-Sifiliográficas · 2019 · 13 citations
    9. 4 Vitamin D resistance Baillière's clinical endocrinology and metabolism · 1994 · 13 citations
    10. Vitamin D Deficiency in Adults with Musculoskeletal Pain Turkish Journal of Osteoporosis · 2015 · 7 citations
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    Community 10 of 905

    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. PSA: Check your vitamin D levels! Reddit · 20 Jun 2025
    3. Hair loss from low ferritin (5 ng/mL) and vitamin D deficiency – how long to see regrowth? Reddit · 14 Jun 2025
    4. Kiierr 312 MD DualWave Laser Review Reddit · 11 Apr 2026
    5. 5 months Minoxidil+Fin progress Reddit · 29 Nov 2025
    6. Noticeable shed after vacation and break in my regimen Reddit · 12 Oct 2025
    7. 3 months transformation (Min+Fin+Derma Roller) Reddit · 5 Dec 2024
    8. 16, female, losing a ton of hair Reddit · 11 May 2024
    9. Seasonal Hairloss Reddit · 12 Feb 2019
    10. Woman with hairloss, want to hear from other women with same problem Reddit · 13 Mar 2017
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