2 citations
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July 2013 in “Fashion business” Keratin essence protects and improves damaged hair.
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
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August 2008 in “PubMed” Repeated digital perming with sodium thioglycolate lotion significantly damages hair protein and structure.
January 2017 in “Deleted Journal” Hair transplantation surgery now offers natural, lasting, and safe results.
February 2026 in “Journal of the Korean Society of Cosmetology” Silicone oil viscosity affects hair curling and damage during treatments.