People who eat three meals a day eat not only to fill their stomachs or satisfy their hunger, but also to ensure the normal development and health of their bodies. Experiments show that the protein digestion and absorption rate in food is 85% for three meals a day; If it is changed to two meals a day, and each meal eats half of the whole day's food, the digestion and absorption rate of protein is only 75%. Therefore, according to the living habits of our people, generally speaking, three meals a day is reasonable. At the same time, it should be noted that the interval between two meals should be appropriate. Too long an interval will cause a high degree of hunger and affect people's labor and work efficiency; If the interval is too short, and the last meal has not been emptied in the stomach, then eating the next meal will make the digestive organs not get proper rest, and the digestive function will gradually decrease, affecting appetite and digestion. Generally, the residence time of mixed food in the stomach is about 4 ~ 5 hours, and the interval between meals is 4 ~ 5 hours. If it is 5 ~ 6 hours, it basically meets the requirements.