Enzymatic Crosslinking of Amino Acids Improves the Repair Effect of Keratin on Hair Fiber

The study "Enzymatic Crosslinking of Amino Acids Improves the Repair Effect of Keratin on Hair Fibre" used hair samples from healthy Chinese adult women to test the effects of different repair solutions. The most effective solution was the Keratin-serine-enzyme repair solution (K-s-eRS), which increased the crystallinity of the hair by 37.20% and reduced alkali solubility by 50.53%. This solution forms a protective film that repairs damaged hair, improves its physical and chemical properties, and enhances its thermal stability. The hair becomes smoother, shinier, and healthier, with a reduced water loss rate. The study concludes that enzymatic crosslinking of amino acids significantly improves the repair effect of keratin on hair fibres, making it a promising approach for repairing damaged hair.