Amino acids are the basic genes that constitute polypeptides. Polypeptide not only has protein's nutritional function, but also has a very important and irreplaceable regulatory effect on human body, involving almost all physiological activities of human body. Such as endocrine, nervous system, digestion, absorption, metabolism, circulation, growth and reproduction. Example 1: Polypeptide is the commander-in-chief of human immune system. Help the human body resist harmful bacteria and prevent infectious diseases. There are all kinds of substances in our human body, which are like an army in the human body, protecting the normal operation of our body and tissues at all times. When our organs and tissues are attacked by external and internal factors, active peptides act as a commander, transmitting information to the army that protects us in time, adjusting various substances in our body, supplementing body energy, devouring harmful bacteria, improving immunity and repairing. Therefore, peptides are regarded as "messengers of information" and "commanders of internal battlefields". Example 2: Polypeptide is the carrier of nutrients, which brings nutrients from the body to the deep skin. Human skin is made up of many nutrients. When some nutrients decrease or lose their activity, it will make our skin aging, out of balance or cytopathic. Peptide molecules are extremely active, just like the carrier in the body, so as to know the current situation of the skin in time, bring the nutrients lacking in the skin to the deep layer of the skin, and play a timely and comprehensive nutritional supplement to the skin from the inside out. Example 3: Polypeptide is a regulator of human endocrine system, which can balance human endocrine. There are many reasons for human endocrine disorders, the most important ones are androgen and androgen imbalance, hormone imbalance and so on. However, the active polypeptide acts as a regulator in the human body, plays a role in balancing and regulating, and restores the human endocrine to the best state. Therefore, active peptides are essential nutrients in human body, and at the same time, they are the commander, transmitter and regulator of human body, and they are indispensable active molecules in human body. The explosive economic development brought by high technology and the improvement of people's economic life put forward higher requirements for improving their own health. The standard of quality of life has become an important indicator to measure the standard of living. The application and development of active peptides is just the beginning. Undoubtedly, complex carbohydrate peptide will be an important direction. We know that Chinese medicine in China is a huge treasure house. The development direction of health food is the effective crude drug components extracted from it combined with bioactive peptides produced by bioengineering. For example, ganoderma lucidum and cordyceps polysaccharide are combined with bioactive peptides by high-tech means to form health care products with high content, easy absorption and strong functions.