"Don't eat after noon" means that it is best to eat only breakfast and a saturated lunch, and then don't eat anything after lunch, but you can eat a certain amount of water until the next morning. For this thing, many people think it is a way of fitness, in fact, it still depends on their physical fitness.

For some people, we don't eat after noon because our daily metabolic capacity is the best in the morning or at noon. What we eat during this time can be absorbed by people's stomach and waste can be discharged. This idea mainly comes from the Taoist practice of avoiding the valley, which has a certain health-preserving effect, because what we eat at night is sometimes indigestible, and not eating for a long time can accelerate the peristalsis of the intestines and expel things for many days. However, for some people, this diet may kill a person. For example, some gastric patients with hyperacidity can't eat after noon, because if they don't eat for a long time, the gastric acid in their stomachs will begin to corrode our stomachs, so these patients with hyperacidity sometimes have gastric ulcers and feel burning pain in their stomachs. If left unchecked, this kind of stomachache will get more and more painful, and finally it may be sent to hospital for treatment, so for some patients with hyperacidity or certain gastric ulcer, don't stop eating after noon.