Why do many people buy green bean paste in the street, but seldom sell red bean paste? In the Han Dynasty, Shennong Herbal Classic recorded its function: "Red beans can dredge the small intestine, facilitate urination, reduce swelling and expel pus, clear away heat and toxic materials, treat dysentery and beriberi, quench thirst and hangover, and promote lactation and fertility." Therefore, in Sun Simiao's "For Emergency Use", there will be medicinal diet boiled with red beans and carp to improve edema beriberi caused by pregnant women in the third trimester. It is precisely because carp can nourish and diuresis, while red beans can diuresis, clear away heat and detoxify. In traditional Chinese medicine, red beans can improve edema caused by kidney, heart and beriberi, which is mainly due to the role of saponin compounds contained in them. In addition to diuresis and constipation prevention, they also have detoxification and vomiting effects. The content of saponins in the seed coat of red beans is particularly high, so don't peel red beans when cooking. According to modern nutritional analysis, red beans are rich in vitamin b 1, which can not only prevent fatigue substances from depositing in muscles, prevent beriberi, but also make sugar easier to decompose and burn. So red beans also have the effect of preventing obesity. "Dietetic Materia Medica" says: "Eat thin people for a long time. The enclosed red bean carp soup is a famous slimming dish. Red bean is a very suitable food for women, because it is rich in iron and has a good blood-enriching function. Whether it is aimed at improving postpartum hypogalactia's condition of pregnant women or relieving the discomfort symptoms of ordinary women during menstruation, drinking a bowl of hot red bean soup often can play a role in regulating menstruation and promoting lactation. However, it must be noted that it is best not to mix it with sweets such as glutinous rice balls and rice balls, because the heat will be too high, but you can add a little brown sugar, which will have a warming effect.