Terre A Mer Deep Fortifying Keratin Hair Shampoo gently purifies your hair and scalp. Formulated with pure keratin, the main protein of the hair, it fortifies and strengthens the hair shaft. Argan oil smooths the cuticle, replenishes vital nutrients and adds luminosity. It is gentle on your hair and sodium chloride free. It is a shampoo that is designed to strengthen and repair damaged hair. It is formulated with a blend of natural ingredients, including keratin, argan oil and amino acids. These ingredients work together to hydrate hair, smooth the cuticle and prevent breakage. The shampoo is also leave-in, so you do not need to rinse it out. It is suitable for all hair types, but it is especially beneficial for dry or damaged hair.