5 citations
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January 1990 in “Journal of Society of Cosmetic Chemists of Japan” Permanent wave lotion can extract proteins from hair, especially when pH is higher, and repeated treatments or bleaching can damage hair.
54 citations
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January 2013 in “Journal of Biological Macromolecules” A new method effectively separates keratin-associated proteins and keratin from human hair.
April 2024 in “Advances in Redox Research” Human hair strength and health are linked to sulfur compounds that can be reduced by stress but improved with sulfur supplements.
191 citations
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November 1959 in “Annals of the New York Academy of Sciences” Hair and wool have complex microscopic structures with microfibrils and varying cystine content.
Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.