The keratinase is produced by submerged fermentation of Aspergillus niger followed by purification and formulation. It’s an aggressive protease with broad specificity. The enzyme is capable of degrading water soluble and insoluble proteins like collagen, whey protein, casein and especially keratin into water soluble smaller peptides and amino acid, outperforming most non-keratin degrading proteases. Often used to pre-treat keratin materials like feather to produce feed additive, or added into feed to improve protein digestion.