Traditional Chinese medicine discussed the reasonable diet earlier. For example, Huangdi Neijing, written as early as the Spring and Autumn Period, put forward various arguments on the relationship between diet and disease more than once, including not being partial to a certain food, and thick and delicious paste is enough to give birth to a big baby. Most of them are related to modern nutrition and medicine. While the diet nourishes the human body, if it is improper, it will hurt the five internal organs of the spleen and stomach, and the damage of the spleen and stomach will cause many diseases. You can refer to Li Dongyuan's theory of spleen and stomach.