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<\/a>Actually, small peptide has important protein nutrition effect as well. In addition to providing amino acids for the animals, such peptide has a variety of physiological activity. In order to realize the optimum performance, a certain number of small peptides are required for animals. With the in-depth research on proteins and amino acids, more and more people come to realize the importance of peptide nutrition, such as palmitoyl pentapeptide<\/a><\/strong> and pure argireline. Certainly, not any kind of small peptides could have the same effects. Furthermore, the best small peptide species for different animals may be limited.<\/p>\n Due to the large number of proteases and peptidases in animals, people used to believe that animal proteins can be absorbed and utilized when they are degraded into free amino acids after the degradation of small peptide. Therefore, in the past decades, scientists usually regarded the amino acids as the main nutrition of medical research, industrial production, career pursuit, as well as the food. In the 1960s, scientists presented the convincing evidence that small peptide can be completely absorbed and utilized. According to this major discovery, people gradually accept the opinion that peptide can be directly absorbed by animals.<\/p>\n