November 2024 in “International Journal of Cosmetic Science” In this study, varying pH levels from 3 to 12 were found to impact hair structure and proteins, with optimal hair health observed between pH 5 and pH 7, while extreme acidic or alkaline conditions notably affected hair morphology and proteome.
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” In this study, researchers identified two novel peptidylarginine deiminases from treated rat keratinocytes, both showing enzyme activity with PAD‐R11 reflecting a characteristic of epidermal enzymes.
December 2025 in “SKINdeep” This paper reviews existing studies on the role of environmental humidity in skin health, highlighting that low humidity can impair the skin's barrier function and trigger inflammatory responses, though the precise mechanisms remain to be fully explored.
54 citations
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January 2018 in “Scientific reports” This study used proteomics to identify various proteins in human hair, which may help develop novel biomarkers for hair health, disease, and aging.