The staple food is the main food in a day. The ancients said that all non-genetically modified grains can germinate and produce yang, which can continue to multiply as seeds. It is healthier than those foods called non-staple foods, such as vegetables, fruits, meat and eggs. This is why staple food accounts for the most at the bottom of the food pyramid, but some people think that meat, eggs and milk are rich in nutrition, while fruits and vegetables are good for the skin, moistening the intestines and relaxing the bowels, and even eat less staple food and more non-staple food to lose weight and satisfy the appetite. These perceptions are all problematic. So you only eat two staple foods a day, which is no problem in principle, but the thickness should be matched to avoid constipation, and you must eat breakfast on an empty stomach without hurting your spleen and stomach, and you must also eat lunch to raise your small intestine. The ancients stopped eating after noon, because at night, the Yin Qi of heaven and earth aggravated the human body, and it was not easy to melt food at this time. But if you want to lose weight and keep fit, if you are hungry after fitness, you can eat less digested and fermented bread and chew slowly. If you are doing bodybuilding, you will eat the same thing, but you should avoid sweating when exercising. Sweating is the fluid of the heart, and it hurts. Fitness exercise should be appropriate and fit the nature of the five internal organs of the human body, otherwise it may not be worth the candle.