Don't eat persimmons when losing weight, because the stomach contains a lot of gastric acid on an empty stomach, persimmon pectin and soluble astringent will react, causing heartburn, nausea, vomiting, bloating, gastric ulcer, even gastric perforation, gastric bleeding and other diseases. It is not advisable to eat oranges when losing weight, because oranges contain a lot of sugar and organic acids. Eating oranges on an empty stomach will stimulate the gastric mucosa and fill the stomach when gastric acid increases. Sugarcane and litchi can't be eaten either, because the sugar content is high, so you can't eat on an empty stomach, otherwise it will stimulate the gastric mucosa and cause stomach pain and satiety. Eating sugar cane or fresh litchi on an empty stomach will cause hyperosmotic coma due to sudden infiltration and high sugar content in the body. You can't eat hawthorn when you lose weight, because maslinic acid has the function of relieving anger and promoting digestion. Eating hawthorn on an empty stomach will not only flatulence, but also aggravate stomach problems.