Improved Humidity-Resistant Hair Straightening Using a Cysteamine-Derived Amino Acid Compound

    July 2026 in “ Preprints.org ”
    Yuji Mochizuki, Sotaro Sato, Kohtaro Katayama … Yoshio Tsujino

    Preprint — not peer reviewed. This was posted to a preprint server or data repository. It has not been through a journal's review process, and its findings may change or not hold up.

    Studysummary In this study, incorporating a novel amino acid compound into a hair-straightening formulation improved humidity-resistant straightening and enhanced the surface and mechanical properties of hair fibers, including increased bending stiffness, reduced friction, and better shape retention under high temperature and humidity conditions.
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