Our store keratin repair utilizes nanoscale hydrolyzed keratin technology to achieve four-dimensional three-dimensional repair for damaged hair caused by perming and dyeing: ** **[Fill the voids] **Nanometer-sized keratin precisely penetrates into the hair core, repairing cysteine bonds broken by perming and dyeing, and filling the void structure of the hair strands.  **[Rebuild the protective film] **Forms an intelligent protective layer on the surface of the hair, reducing secondary damage caused by UV rays & high-temperature styling.  **[Long-lasting softness] **Cationic polymers permanently close the hair cuticle, bidding farewell to frizzy split ends, presenting a silky, straight texture.  **[Lock and protect color] **Unique color locking factors can extend the retention time of dyed hair color by 2-3 times