January 2019 in “Figshare” Redheaded people have higher levels of vitamin D precursor, suggesting their hair color may be an adaptation to low sunlight areas.
December 2019 in “bioRxiv (Cold Spring Harbor Laboratory)” Redheaded people have higher levels of a vitamin D precursor, suggesting red hair may be an adaptation for better vitamin D synthesis in areas with less sunlight.
5 citations
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June 2020 in “Experimental dermatology” Redheaded people may have evolved to efficiently make vitamin D in areas with less sunlight.
14 citations
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November 2005 in “Life sciences” Vitamin D3 may protect rat hair follicles from radiation damage.
15 citations
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January 1995 in “Archives of dermatological research” OCT binds strongly to hair sheath cells and may affect skin and hair growth with fewer side effects than vitamin D3.