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,
June 2020 in “Experimental dermatology” Redheaded people may have evolved to efficiently make vitamin D in areas with less sunlight.
14 citations,
November 2005 in “Life sciences” Vitamin D3 may protect rat hair follicles from radiation damage.
15 citations,
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.