Introducing the New Matrix Biolage Advanced KeratinDose line that targets overprocessed hair, whether it be from colour, bleach, relaxers, texturizers, keratin straightening or any other chemical services. KeratinDose contains Pro-Keratin, an essential protein for building strength in your hair. The combination of Pro-Keratin with silk amino acids leaves hair soft and silky, yet strong and healthy. Pro-Keratin Renewal Spray is a light leave-in lotion for added shine and manageability, while reducing unsightly frizz.