45 citations
,
December 2006 in “Biopolymers” Permanent waving weakens hair by altering its protein structure.
70 citations
,
June 1998 in “Polymer” Permanent waving damages hair by disrupting its keratin structure.
October 2024 in “Cosmetics” ATG effectively reduces hair frizz without damaging hair strength.
December 2021 in “Journal of natural fibers” The conclusion is that new methods for isolating hair cuticle cells and removing the cuticle layer are effective and convenient.
5 citations
,
February 1998 in “Polymer” Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.