November 2024 in “International Journal of Cosmetic Science” Haircare products with a pH between 5 and 7 are best for maintaining healthy hair.
125 citations
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February 1971 in “Biochemistry” Specific cross-linkages help make hair proteins stable and strong.
39 citations
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August 1998 in “FEBS Letters” Two new enzymes, PAD-R11 and PAD-R4, were cloned and showed activity, with PAD-R11 resembling epidermal enzymes.
December 2025 in “SKINdeep” Low humidity harms skin health by damaging the skin barrier and increasing inflammation.
54 citations
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January 2018 in “Scientific reports” Human hair contains diverse proteins, including keratins and histones, which could help assess hair health and aging.