9 citations
,
December 2018 in “Journal of Analytical Toxicology” This study found that exposure to artificial sunlight led to variable changes in ethyl glucuronide levels in hair, with both increases and decreases observed depending on hair characteristics.
27 citations
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January 1995 This study found that higher melanin concentration in black hair offers photoprotection against sunlight-induced protein damage in the cortex, whereas the cuticle experiences similar photodamage regardless of hair pigmentation.
1 citations
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December 1989 in “PubMed” This review discusses the effects of sunlight and artificial UV radiation on the skin and reports no new clinical results; a panel from the NIH found the evidence insufficient to recommend tretinoin for sun-induced wrinkles.
18 citations
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March 2009 in “Skin pharmacology and physiology” This study found that sunlight exposure causes significant structural and chemical damage to hair, including cuticle loss, cortex damage, and discoloration, with water playing a major role in discoloration of brown hair.
1 citations
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February 2003 This study found that UVB radiation primarily causes hair protein loss, while UVA radiation mainly contributes to hair color changes, with no significant differences in mechanical properties observed between photooxidized and non-irradiated hair.