Increased Calcidiol Level in Redhaired People: Could Redheadedness Be an Adaptation to Temperate Climate?

    Jaroslav Flegr, Kateřina Sýkorová, Vojtěch Fiala … Šárka Kaňková

    Preprint — not peer reviewed. This was posted to a preprint server or data repository. It has not been through a journal's review process, and its findings may change or not hold up.

    Studysummary This study found that redhaired individuals consistently had higher calcidiol levels compared to non-redhaired subjects, suggesting a physiological adaptation for vitamin D synthesis in low UV-B conditions.
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    Research cited in this study 3

    1. The Role of Vitamins and Minerals in Hair Loss: A Review Dermatology and Therapy · 2018
    2. Diet and Hair Loss: Effects of Nutrient Deficiency and Supplement Use Dermatology practical & conceptual · 2017
    3. The Role of Psychological Factors and Serum Zinc, Folate, and Vitamin B12 Levels in the Aetiology of Trichodynia: A Case-Control Study Clinical and Experimental Dermatology · 2009