The dangers of not eating breakfast are as follows: First, the harm to the brain. Although the weight of brain tissue only accounts for 2-3% of a person’s body weight, the brain’s blood flow is about 800 milliliters per minute, oxygen consumption is about 45 milliliters per minute, and sugar consumption is about 5 grams per hour. The brain tissue of adolescents is developing, and the demand of blood, oxygen and glucose is even higher than that of adults. If the blood sugar is too low, the brain consciousness activity will be impaired, and in the long run, it will inevitably affect the weight and morphological development of the brain. Second, the harm to the digestive system. Under normal circumstances, the food eaten on the first night after about six small emptying from the stomach into the intestines. The next day if you do not eat breakfast, stomach acid and various digestive enzymes in the stomach will go to “digest” the gastric mucosa layer. In the long run, the normal function of the cells to secrete mucus will be destroyed, easily causing gastric ulcers and duodenal ulcers and other digestive system diseases. Third, causing arteriosclerosis and more likely to lead to obesity. There are many young students are afraid to grow fat and do not eat breakfast. This practice has no scientific justification. The body’s caloric needs are standard, do not eat breakfast, is bound to increase the amount of food in the middle and dinner. And after dinner is generally less exercise, more likely to cause fat accumulation and lead to obesity. In addition, long-term skipping breakfast will also make cholesterol, lipoprotein deposits in the inner wall of the blood vessels, leading to vascular sclerosis. Fourth, let you slow reaction: breakfast is the source of energy for brain activity, if you do not eat breakfast, the body can not supply enough blood sugar for consumption, will feel tired, fatigue, brain power can not focus, mental discomfort, slow reaction. V. Chronic diseases may be “on” the body: do not eat breakfast, hungry to start the day’s work, the body in order to obtain power, will use the thyroid, parathyroid, pituitary and other glands to burn tissue, in addition to causing glandular hyperactivity, but also make the body acidic, suffering from chronic diseases. Sixth, the stomach and intestines may want to “rebel”: do not eat breakfast until noon, the stomach for a long time in a state of hunger, will cause excessive secretion of gastric acid, so it is easy to cause gastritis, gastric ulcers. Seven, constipation “out of the cage”: in the case of three regular meals, the human body will naturally produce the phenomenon of gastrointestinal reflex, simply put, to promote defecation; if you do not eat breakfast into the habit, long-term may cause the role of gastrointestinal reflex dysfunction, and thus produce constipation. Eight, will make you closer to the obese: once the body is aware of the lack of nutrition, the first consumption is carbohydrates and protein, the last consumption is fat, so do not think that not eating breakfast will help fat consumption. On the contrary, do not eat breakfast, but also make lunch and dinner to eat more, slimming can not but more fat. Nutritionists have confirmed that breakfast is the least likely to turn into a fat meal of the day for everyone. If you do not eat breakfast every day will only make lunch eat more. So breakfast is very important, the ratio of breakfast, lunch and dinner is best 3:2:1, which allows you to eat the essence of the day in the most physically active time to consume.