Carbohydrates make up a large portion of the nutritional content of foods called carbohydrate foods, such as flour. Carbohydrate foods include staple foods and some desserts. Staple foods are categorized into cereals, potatoes, and legumes; artificially processed refined carbohydrates are also carbohydrate foods, such as cakes. Cereals include barley, rice, flour, black rice, oats, etc. Potatoes mainly include sweet potatoes, purple potatoes, potatoes, etc. Miscellaneous beans include red beans, mung beans, chickpeas, peas, fava beans, kidney beans and so on. Take mung beans as an example, every 100 grams of mung beans can provide 329 calories, containing 62 grams of carbohydrates, 6.7 grams of dietary fiber, 21.6 grams of protein, 0.8 grams of fat, 81 milligrams of calcium, 6.5 milligrams of iron. It can be seen that mung beans are 62% carbohydrate, which is high in calories and comes mainly from carbohydrates, making it a typical carbohydrate food. In addition, artificially processed refined carbohydrates also belong to the carbohydrate food, such as cakes, breads, cookies, patties and so on. Only these carbohydrate foods have a significant proportion of artificially added sugars, less dietary fiber, and a heavier glycemic index as well as glycemic load, and are not quality carbohydrates. Carbohydrate food is a class of food that is essential for maintaining good health. Chinese residents dietary pagoda recommended daily intake of staple foods for about 250 grams to 400 grams, of which 1 / 3 to come from coarse grains. Therefore, combining coarse and fine food, reducing the intake of over-processed refined carbohydrates, and reducing the intake of added sugar such as cake are extremely important for health.