37 citations
,
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.
2 citations
,
July 2012 in “PubMed” In this study, the use of internal wool lipid liposomes was shown to improve the lipid composition and increase the resistance to breaking in both untreated and chemically treated hair fibers.
41 citations
,
May 2005 in “International Journal of Cosmetic Science” This study observed that in Japanese females, hair lipid composition showed significant correlations, suggesting CH and CERs may act as a barrier against sebum-derived lipids.
September 2025 in “Cosmetics” In this study, researchers found that the lipid composition in hair significantly affects water diffusion and may explain differences in dyeing and cosmetic treatment responses between Asian and European hair, with CP2 fibers having more lipids than CP3 fibers.
21 citations
,
March 2017 in “Skin research and technology” In this study, extracting internal lipids from Caucasian hair fibers led to decreased water permeability, influenced by the fluidity of lipids.
