Effect of Shampoo, Conditioner, and Permanent Waving on the Molecular Structure of Human Hair
October 2015
in “
PeerJ
”
New to Keratin? There is a guide in the encyclopedia. Read the guide → Studysummary 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.
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The study investigated the effects of shampoo, conditioner, and permanent waving on the molecular structure of human hair using X-ray diffraction. It concluded that shampoo and conditioner primarily affected the hair's surface without altering the internal keratin and lipid structures. In contrast, permanent waving caused significant changes by breaking and reforming disulfide bonds within the hair shaft, reducing the number of keratin coiled-coils, and altering intermediate filaments. These findings underscored the importance of understanding the molecular effects of hair treatments to manage hair health and minimize damage.
