Clinically proven to deliver internal repair to severely damaged hair from the very first use. The concentrated formula of this hair treatment for damaged hair features our highest level of proteins containing keratin, collagen, and elastin. Nexxus combines black rice with keratin protein and other essential nutrients to create clinically proven healthy-looking hair. Salon-crafted with our exclusive protein fusion blend, it's part of a unique 4-step process. When complete, signs of surface damage are healed, and hair is smooth, strong, and healthy-looking. It's safe and formulated for color and chemically-treated hair. At Nexxus, we believe helping hair return to its optimal state means treating it with protein at high levels. Along with our Nexxus keratin deep conditioner, try our shampoo for damaged hair, and add a gel treatment or revitalizing hair mask. We've created possibly our best hair mask: Keraphix hair masque for damaged harbor's favorite deep conditioning hair treatment. A leader in salon-quality hair products, Nexxus uses learnings from science and nature. We know that hair is made of almost 90% proteins, which is why we use advanced scientific methods to identify the protein needs of each hair type and create customized formulas with proteins to bring your hair back to life.