The main principle is to extract limonin and citrus flavonoids from lemon and citrus peel respectively. A large number of clinical experiments in the United States and Japan show that their main functions are to reduce inflammation and prevent the growth of cancer cells. The American-made limonin buccal tablets and capsules are deeply loved by people. People in China all know that the functions of Chenpi Chenpi are: invigorating the spleen and eliminating dampness, reducing phlegm and blood fat, soothing the liver and moistening the lungs, and so on. Flavonoids and limonin in citrus peel play a very important role.