Phospholipids, known as "bricks of life", are the main components of human cell membranes. Maintaining the integrity and permeability of cell membrane and participating in nerve function and nerve signal transduction are the core and foundation of nervous system. In addition to forming biofilm, phospholipids are also one of the components of bile and membrane surface active substances, and participate in the recognition and transport of protein by cell membrane. It can be said that phospholipid is the basis of nerve health, and phospholipid DHA is the main form of DHA absorption and utilization in the brain, and it is an important molecule to assist the transport of nutrients such as glucose in the brain. Therefore, the content of human phospholipid DHA directly affects brain and visual health.