The intense strengthening products in the keratin phyto-protein collection luxuriously repair weak, fragile and damaged hair and provide 2X more protection against future breakage.* Keratin phyto-protein strengthening shampoo is a gentle cleanser that luxuriously strengthens and repairs fragile hair. *when using bain de terre keratin phyto-protein shampoo & conditioner vs. a non-conditioning shampoo.