Oranges are generally best eaten about half an hour after a meal. Orange is one of the common fruits, containing a lot of vitamins, folic acid and fruit acids. Among them, vitamin C is rich, can strengthen the body’s resistance, can also be fat-soluble harmful substances out of the body, is a good antioxidant. But oranges contain a lot of acid and enzymes, eating on an empty stomach can be into the secretion of gastric acid, plus the orange itself contains a lot of acid, may lead to damage to the gastric mucosa acute gastritis, peptic ulcer, etc.. And half an hour after the meal food will be diluted stomach acid, peristalsis of the intestines will be most of the food delivered to the intestines, will not increase the acidic environment in the stomach, will not increase the digestive burden of the gastrointestinal tract, and the vitamins and trace elements in oranges can be fully absorbed. In addition, although oranges are good, but should not eat more, generally mastered in 1-2 is appropriate. Patients with peptic ulcers should not eat oranges, so as not to aggravate the ulcer; and it should not be taken with milk, so as not to form clots in the stomach to aggravate the digestive burden of the stomach, resulting in abdominal distension, abdominal pain and other symptoms of indigestion.