1 citations
,
January 2006 High temperatures and cosmetic processes can damage hair keratin, affecting its structure and strength.
Chemical treatments weaken hair's thermal stability and structure.
May 2009 in “International Journal of Cosmetic Science” Permanent waving damages hair protein and weakens hair, especially with repeated treatments using sodium thioglycolate.
3 citations
,
August 2008 in “PubMed” Repeated digital perming with sodium thioglycolate lotion significantly damages hair protein and structure.
30 citations
,
April 2017 in “Journal of structural biology” Human hair keratin fibers have a detailed nano-scale structure that changes with different conditions.