Functional foods include: foods that enhance human physique (enhancing immunity and activating lymphatic system, etc.). ); Food for preventing diseases (hypertension, diabetes, coronary heart disease, constipation and tumor, etc.). ); Healthy food (controlling cholesterol, preventing platelet aggregation, regulating hematopoietic function, etc.). ); Foods that regulate the body rhythm (nerve center, nerve endings, intake and absorption functions, etc.). ) and foods that delay aging.