4 citations
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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.
1 citations
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January 2006 High temperatures and cosmetic processes can damage hair keratin, affecting its structure and strength.
June 2017 in “University of the Arts London Research Online (University of the Arts London)” Polymers help reduce damage and improve bleached hair when used during or after bleaching.
Oxidized hair can naturally regain strength and stability over six months.
Hair coloring and bleaching can permanently break down hair protein and temporarily change its properties.