It seems counter-intuitive, but some proteins load up the hair cuticle and can lead to brittle, dry-feeling hair. But protein itself does not dry out hair; rather, when it seals the cuticle, it can intensify the dry feeling of already dry or damaged hair. Therefore, it's important to combine proteins with moisturizing ingredients, which Briogeo does in all of its formulas. We use balanced levels of proteins plus moisturizers to gently refresh and coat the hair cuticle, adding back shine and strength to stressed hair.