Fishy short-chain polypeptide and application thereof to nutrition enhancers

The invention provides a fishy short-chain polypeptide and an application thereof to nutrition enhancers. The fishy short-chain polypeptide takes fish as raw materials and is a short-chain polypeptide preparation mainly containing 2-8 amino acid molecules. The fishy short-chain polypeptide has the advantages of high safety and freshness and low histamine value, components with the molecular weight smaller than 800Da are 80% or more, and the histamine value is lower than 30mg/100g (based on dry basis calculation). Protein components contain 10-25% of collagen short-chain polypeptide, and recovery of big wounds is facilitated. The fishy short-chain polypeptide can effectively provide complete protein components, nutrition indexes of patients are effectively improved, immune inhibition of surgical stress induction is reduced, recovery of body immunities is facilitated, and rehabilitation of the patients is effectively facilitated. 本发明提供种鱼短肽及其在营养强化剂的应用。采用鱼为原料，是种含2-8个氨基酸分子为主的短肽制剂。该鱼短肽具有高安全性、高新鲜度和低组胺值的特点，分子量小于800Da