Hydrolyzed Keratin, is the partial hydrolysate of the keratin from enzymatically degraded shear wool and is a brownish-yellow solution with a slight inherent odor. Due to its composition, one can describe hydrolyzed keratin as a hair-identical protein hydrolysate. Compared to other proteins, the keratin has a high proportion of cystine. Hydrolyzed keratin does not only show an affinity to hair; on skin it acts as a protective and care substance. Hydrolyzed keratin has the best alcohol solubility out of all protein hydrolysates; it is therefore also suitable for aqueous/alcoholic formulations