Antioxidant collagen peptide prepared by enzyme method and preparation method thereof

The invention provides antioxidant collagen peptide prepared by an enzyme method and a preparation method of the antioxidant collagen peptide, and relates to the technical field of biological medicines.The antioxidant collagen peptide is prepared from pigskin, the enzymolysis process of the antioxidant collagen peptide is divided into two steps of primary enzymolysis and secondary enzymolysis, neutral protease is used for enzymolysis in the primary enzymolysis, and neutral protease is used for enzymolysis in the secondary enzymolysis; wherein the primary enzymolysis uses neutral protease; after the primary enzymolysis is completed, adjusting the pH value of the enzymolysis solution: adjusting the enzymolysis solution to be weakly acidic, and carrying out secondary enzymolysis by using acid protease; or adjusting the enzymolysis solution to be alkalescent, and performing secondary enzymolysis by using alkaline protease. In the enzymolysis process, primary enzymolysis and secondary enzymolysis are carried out o