40 citations
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February 2002 in “International Journal of Dermatology” In this study, hair damaged by permanent dye showed signs of recovery over time, with near complete restoration to its original state after eight weeks.
5 citations
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June 2013 in “Fashion business” This study found that adding rose hip extract to permanent wave solutions increased wave effectiveness and reduced hair damage, although variations in hair type may affect the results.
November 2016 in “University of the Arts London Research Online (University of the Arts London)” This study concluded that adding polymeric conditioning actives to shampoos improved color retention in permanently dyed hair, while additional cationic dyes at certain pH levels weakly dyed the hair directly.
August 2024 in “International Journal of Cosmetic Science” This study found that acetyl zingerone methyl ether (MAZ) in hair dyes and haircare products may reduce oxidative damage, improve hair condition, and enhance the longevity and quality of dyed hair color.
4 citations
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June 2020 in “JAAD case reports” This study presents a rare case of alopecia totalis occurring after the use of permanent hair dye.