75 citations
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November 1965 in “Textile research journal” Papain and bisulfite break down human hair by dissolving parts of it.
69 citations
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April 2005 in “Forensic Science International” Degraded hair shafts resist contamination and can be easily cleaned.
25 citations
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May 2019 in “Cosmetics” 18-MEA and cationic surfactants can restore and maintain hair's hydrophobic nature, improving its beauty and feel.
5 citations
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October 2002 in “PubMed” Human hair keratin scaffolds help repair injured muscles by breaking down and activating muscle cell growth.
Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.