September 2025 in “International Journal of Cosmetic Science” Friction causes hair breakage during combing, and fragment count predicts hair strength.
October 2025 in “International Journal of Cosmetic Science” Conditioners improve hair manageability but don't repair damage.
8 citations
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December 2003 in “Materials Research-ibero-american Journal of Materials” Polyquaternium 7® builds up on hair, improving its look and feel, and AFM is good for measuring these changes.
7 citations
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October 2008 in “Nature Genetics” Two key genetic areas linked to male-pattern baldness were identified.
43 citations
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September 2001 in “Scanning” Hair treatments like bleaching increase friction by exposing tiny pores on the hair surface.