In the past twenty years, the role of peptides in the human body has been paid more and more attention by the scientific community. The results showed that the protein was absorbed by animals, not completely hydrolyzed into amino acids, but most of the absorption in the form of peptides, but also found that the absorption rate of peptides is faster than the same amino acids. Not only this, oligo peptides and polypeptides with specific modulation of the autonomic nervous system, activation of cell immune function, improve cardiovascular function and anti-aging physiological activity. These findings provide a theoretical basis for the development of peptide and peptide health food, functional food, old food, infant food and Sport food, to change the modern sub-health status and nutritional support therapy in clinic has wide development space and vision, the active peptide with human health industry will become the biggest industry of the is this century, a century of great wealth.

It was found that the functional and physiological activities of peptides were closely related to the molecular weight and the length of amino acids. According to the published literature, the soybean protein molecular weight above 20000D, the molecular weight of 5000D ~ 10000D for soybean poly peptide molecular weight below 1000D, from 2 to 6 amino acid peptide for soybean oligopeptide. Different chain length of soybean peptide product has stronger absorption function than soybean protein, have different biological activity, but the oligopeptide, especially the oligopeptide function in the nutrition and physiological activity is more prominent, such as lowering blood pressure, lowering cholesterol, enhance immunity, anti-oxidation and other physiological functions. Therefore, the research on the development and application of various aspects of the increasingly active peptide products abroad, research scope widely, including hydrolysis of protein peptide product development with casein peptide and soybean peptide, wheat peptides, corn peptide, blood protein peptide, protein peptide and other aquatic products.

There are a lot of work in research and development of animal and plant protein peptide, especially in the United States and Japan since 1990s, conducted a comprehensive study on soybean polypeptide, developed a variety of soybean polypeptide functional food, such as food, resistance to restrain the rise of blood pressure variability of infant food, food, beverages and sports nutrition supplement with acidic protein agent. However, developed countries, especially the United States to adopt a blockade policy on soybean peptide processing technology.