At present, collagen or gelatin has been widely used in medicine, food, cosmetics and other fields. With the advancement and maturity of processing technology, the preparation of bioactive peptides has become more and more extensive, and collagen peptides have also received extensive attention.
Preparation source of collagen peptides:
Collagen peptides can be prepared from a wide range of sources. The most widely used preparation sources include pigs, cattle, and aquatic products (especially fish). There are also reports on sheep, frogs, and poultry. my country is a major country in aquatic products in the world. In recent years, collagen peptides derived from aquatic animals have gradually received more attention.

Composition and characteristics of collagen peptides:
Collagen peptides contain both hydroxyproline and hydroxylysine, while other proteins contain less hydroxyproline and even less hydroxylysine. Notably, lysine and hydroxyproline play important roles in linking peptides and stabilizing the triple helix structure of collagen. The content of proline and hydroxyproline in aquatic animal collagen is lower than that of mammalian collagen, so the destruction temperature of its helical structure is lower, the molecular structure is easier to be enzymatically hydrolyzed, and it has low antigenicity and hypoallergenicity. Features. Therefore, aquatic by-products such as skin, phosphorus, bone, etc. are increasingly considered as high-quality sources for the preparation of collagen peptides, which are more cost-effective than mammalian sources.