Did you know that keratin can help with frizzy or loose hair? This fibrous protein has an important strengthening effect. Care Keratin Smooth Conditioner does this from the inside out, through the ingredient Provitamin B5. These also ensure that your hair absorbs moisture better. And that means: good for hydration. The Quat Complex in this keratin conditioner protects against hair breakage - so it's also ideal for dry and damaged hair.