3 citations
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August 2008 in “PubMed” Repeated digital perming with sodium thioglycolate lotion significantly damages hair protein 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.
October 2024 in “Cosmetics” ATG effectively reduces hair frizz without damaging hair strength.
January 2024 in “Molecules (Basel. Online)” Juglone from walnut extracts may help repair damaged hair.
18 citations
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July 2015 in “Journal of cosmetic dermatology” Straightening and coloring hair, especially with sodium hydroxide, greatly increases protein loss.