K18 Leave-In Molecular Repair Hair Mask 15ml is a revolutionary treatment that works at the molecular level to reverse hair damage in just 4 minutes. Powered by the patented K18PEPTIDE™, it penetrates deep into the hair cortex to reconnect broken polypeptide chains, restoring strength, elasticity, and smoothness. Ideal for all hair types, this leave-in formula addresses damage from bleach, color, chemical services, and heat. Key ingredients include hydrolyzed wheat protein, tocopherol (vitamin E), and citric acid, which work together to nourish and protect the hair. Clinically proven for lasting results. ​