Phosphatidylcholine (PC) is a type of phospholipid that can be synthesized chemically. Unfortunately, it’s difficult to control the purity of natural phosphatidylcholine PC, relatively unstable in nature, can be metabolized into other products in the process of usage and storage. Compared to natural phosphatidylcholine, synthetic phosphatidylcholine has the following advantages: i) the property is relatively stable; ii) the purity is relatively high.