7 citations,
February 1998 in “Polymer journal” Keratin structure in hair is stable at pH 5-6 but disrupts between pH 6-7.
45 citations,
December 2006 in “Biopolymers” Permanent waving weakens hair by altering its protein structure.
12 citations,
June 2011 in “Journal of applied polymer science” L-phenylalanine and hydrolyzed eggwhite protein deeply penetrate human hair.
4 citations,
January 2007 in “Sen'i Gakkaishi” Permed hair degrades faster and shows more damage after protease treatment compared to untreated hair.
October 2024 in “Cosmetics” ATG effectively reduces hair frizz without damaging hair strength.