The K18 Leave-In Molecular Repair Hair Mask is clinically proven to reverse hair damage at the structural level — delivering measurable improvements in strength, elasticity, smoothness, and integrity after just one application.
At the core of the formula is the patented K18Peptide™ (sh-Oligopeptide-78), a biotech-developed peptide engineered to match the molecular structure of hair's inner polypeptide chains. Upon application, the peptide penetrates the hair cortex and reconnects broken keratin chains and disulfide bonds — the same bonds compromised by bleach, oxidative color, chemical services, and thermal styling. The repair process activates in 4 minutes and, unlike surface-level conditioning treatments, the results do not wash out.
Clinical data supports what stylists have observed for years: progressive, cumulative repair with each use, including a measurable reduction in breakage, split ends, and color fade. Because the K18Peptide™ is recognized by hair as biomimetic — structurally identical to its own building blocks — it integrates permanently rather than sitting on the surface.
Suitable for all hair types, textures, and damage levels, K18 is the only leave-in treatment on the market that operates at the polypeptide level, making it the most advanced and evidence-backed hair repair solution available today.
