66 citations
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September 2005 in “Photochemical & photobiological sciences” This review discusses the current understanding of hair photodamage and photodegradation and reports no new findings; it highlights unresolved questions about radiation effects and melanin's role in different hair types.
7 citations
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January 2001 in “Comprehensive series in photosciences” This study found that UV stabilizers must diffuse uniformly and in high uptake levels throughout hair fibers during humidification cycles to effectively prevent photo-oxidative degradation.
March 2007 in “International Journal of Cosmetic Science” This study found that Indian and Chinese black hair, with higher melanin content, resist photochemical degradation better than European hair, which has lower melanin levels, when exposed to dry, hot climates.
December 2021 in “Cosmetics” 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.