The hazards of eating one meal a day include malnutrition, harming the stomach, and triggering gallbladder stones. 1. malnutrition: eating only one meal a day, the amount of dietary intake is too small, it is easy to malnutrition, at the same time the body’s resistance will also be reduced, may appear hypoglycemia, dizziness, anemia and other symptoms. 2. Harm to the stomach: the harm to the stomach of eating one meal a day is mainly reflected in the rhythmic effect on the stomach, as well as gastric mucosa damage. The stomach is in a state of fasting for a long time, which will make the stomach soak in gastric acid, and the prolonged soaking will cause damage to the gastric mucosa. The less serious patients will have gastric mucous membrane erosion, and the more serious patients will have gastric ulcers and duodenal bulb ulcers. 3. Induce gallbladder stones: Eating only one meal a day will affect the emptying of the gallbladder, and prolonged fasting will lead to the accumulation of bile in the gallbladder, which will lead to gallbladder stones. You should maintain a healthy and reasonable diet in your daily life.