17 citations
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July 2019 in “Scientific reports” This study investigated lipid loss in hair caused by surfactants and found that surface and internal modifications can significantly protect different lipids from depletion, with internal modification preventing 52.0 to 81.3% of lipids in certain groups.
7 citations
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March 2005 in “International Journal of Cosmetic Science” This study found that menopause alters hair lipids and reduces hair quality, with hormone replacement therapy mitigating some changes.
55 citations
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January 2013 in “International Journal of Cosmetic Science” In this study, researchers found that higher concentrations of internal lipids in African hair may influence its keratin structure, as observed through various analytical methods.
1 citations
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January 2025 in “International Journal of Cosmetic Science” In this study, researchers identified a three-step process underlying age-related curved hair from cyclical extension: surface lipid transfer, specific disulfide bond cleavage, and unraveling of α-helices into β-structures, which may inform care strategies to manage hair curvature.
37 citations
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October 2015 in “PeerJ” This study found that shampoo and conditioner do not alter hair's molecular structure, while perming treatments significantly affect keratin and intermediate filament structures due to bond alterations.