WHAT IT IS Bain de Terre Keratin Phyto-Protein Strengthening Shampoo is a gentle cleanser that luxuriously strengthens and repairs fragile hair. This keratin strengthening shampoo s sulfate-free color-safe formula more than doubles protection against future combing breakage. WHAT IT DOES The unique blend of wheat corn and soy proteins combined with plant-derived botaniceuticals and enriched with keratin to replenish hair rsquo s natural protein nourishes revitalizes and protects to keep hair strong healthy and lustrous. For weak fragile hair that needs protein.