Many people have put forward this concept, such as Goubao and Lubao. Keppel is rich in 13 kinds of essential amino acids required by the growth and development of laying hens, and is rich in unknown growth factors (UGF), B vitamins, unique immune synergists, immune activating factors and chelating trace elements, which can replace part or all of methionine in the formula and play a role in supplementing and strengthening animal protein, essential amino acids and trace elements. Because of its good nutritional complementarity and coordination, Keppel's nutritional efficacy is better than that of imported amino acids. Feeding Jibao for a long time can enhance the immune function and promote the healthy development of chickens. No one seems to say that Keppel is good for people.