Not eating for a long time can lead to digestive disorders, malnutrition and hypoglycemia. If you want to be healthy, you should take in food regularly, which is not only good for the gastrointestinal system, but also can provide the energy needed for human metabolism. When the body does not eat for a long time will be in a state of hunger, the gastric glands will secrete a large amount of gastric acid, which is not neutralized by food, so it will cause irritation to the gastric mucosa. Long-term will induce gastritis, gastric ulcer, duodenal ulcer and other diseases, so the digestive system will cause adverse effects. Since the intestinal system is unable to absorb nutrients from food, the body’s metabolism will be affected and malnutrition will be induced in the long run. The human metabolism needs enough sugar, and not eating for a long time will also lead to excessive consumption of sugar by the body, and cause hypoglycemia will be manifested as dizziness, nausea and other symptoms.