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January 2006 High temperatures and cosmetic processes can damage hair keratin, affecting its structure and strength.
October 2024 in “UNESP Institutional Repository (São Paulo State University)” Straightening and dyeing damage hair structure.
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January 2011 Relaxers straighten African hair by breaking down its helical structure using strong bases.
December 2025 in “Cosmetics” The bio-based complex effectively repairs and protects chemically damaged hair.
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January 2007 in “Sen'i Gakkaishi” Permed hair degrades faster and shows more damage after protease treatment compared to untreated hair.