Litchi is a plant of Litchi department of Sapindaceae, and originated from China. It is not only a kind food with good color, smell and tastes, but also a precious tonic. It has two functions as food and precious tonic. In recent years, some active ingredients extracted from litchi already have aroused people's interest. The research showed a lot of functional ingredients such as anthocyanin, phenolic acid, polysaccharide, proanthocyanidin. The substance extracted from litchi pit or peel have s...