Pea is a kind of nutritious food, especially containing more trace elements such as copper and chromium. Copper is beneficial to hematopoiesis and the development of bones and brain. Chromium is beneficial to the metabolism of sugar and fat and can maintain the normal function of insulin. Choline and methionine contained in peas help prevent arteriosclerosis; Moreover, the vitamin C contained in fresh peas ranks first among all fresh beans. People with diabetes, hypertension and coronary heart disease, the elderly, children and eating peas are all beneficial. The phytohemagglutinin contained in peas is similar to the lectin contained in beans and lentils, which can agglutinate human red blood cells and promote mitosis. It can activate lymphocytes of tumor patients and produce lymphotoxin, which has non-specific damage to many animal cells. Because of this, peas also have the function of expanding intestines, so they will fart when eaten, and pregnant women can't eat peas.