Nexxus Keraphix Keratin Mask for Damaged Hair 

Hair is made up of protein. Every touch, every treatment, every style you love—it all rewrites your hair’s protein. When protein is damaged, hair’s look and feel is compromised. That’s why Nexxus uses protein science not just to repair hair but to restore its ability to perform. It isn't about one perfect hair day. It's about a lifetime of healthy hair, built strand by strand. Frequent heat styling and chemical processing can break down disulfide bonds and strip essential amino acids, leading to cuticle erosion and damage deep within the hair fiber. This makes strands weak, dull, tangled, harder to style, and less smooth and shiny. This proteomic damage treatment hair mask, part of KERAPHIX™, our extreme damage repair collection, is powered by KRT™ Keratin Resistance Therapy with liquid crystal serine amino acid to rebuild internal strength from the inside out. These hair masks for damaged hair work both on the inside and the outside of the hair fiber, deeply treating roughness and brittleness for smooth and revived hair. With its richly concentrated formula, this hair mask for dry damaged hair penetrates deeply to bind moisture, restore flexibility, and leave hair more aligned and soft. After just one use of the hair masque with the full Keraphix system, hair looks visibly healthier and feels stronger, while continued use helps reinforce the cortex for lasting resilience—so hair is shiny, fluid-soft, damage-resistant, and ready to bounce back with every style. Nexxus, the protein science behind powerful hair since 1979.