One, the harm to the brain. Although the weight of the brain tissue accounts for only 2-3% of the human body weight, but the brain blood flow is about 800 milliliters per minute, oxygen consumption is about 45 milliliters per minute, sugar consumption is about 5 grams per hour. Teenagers' brain tissue is in the developmental stage, and the demand for blood, oxygen and glucose is higher than that of adults. If the blood sugar is too low, the brain conscious activity will be impaired, long-term, is bound to affect the brain weight and morphological development.

Two, the harm to the digestive system. Under normal circumstances, the first night to eat food after six small or so from the stomach to empty into the intestinal tract. If you don't eat breakfast the next day, 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 cell secretion mucus will be damaged, it is easy to cause gastric ulcer and duodenal ulcer and other digestive diseases.

Three, causing atherosclerosis and more likely to lead to obesity. There are a lot of teenage students are afraid of gaining weight and do not eat breakfast. This practice has no scientific justification. The human body on the calorie demand is a standard, do not eat breakfast, is bound to increase the amount of food in the dinner. After dinner is generally less exercise, more likely to cause fat accumulation and lead to obesity. In addition, long-term not eating breakfast will also make cholesterol, lipoprotein deposits in the inner wall of the blood vessels, resulting in vascular sclerosis.

Four: make you unresponsive: 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, you will feel tired, fatigue, brain power can not concentrate, mental instability, unresponsive.

Five: 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 glands 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 to eat, the stomach for a long time in a state of hunger, will cause excessive secretion of gastric acid, so 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 gastrointestinal reflex phenomenon, in short, to promote defecation; if you do not eat breakfast into the habit of long-term gastrointestinal reflex dysfunction may be caused by the production of constipation.

Eight: will make you closer to the obese: once the human body realizes the lack of nutrients, the first consumption of carbohydrates and protein, the last consumption of fat, so do not think that do not eat breakfast will help the consumption of fat. On the contrary, do not eat breakfast, but also make lunch and dinner to eat more, slimming not but more fat.

Nutritionists have confirmed that breakfast is the one meal of the day that everyone is least likely to turn into fat. If you don't eat breakfast every day, you'll only eat more for lunch.

So breakfast is very important, the ratio of breakfast, lunch and dinner is best 3:2:1, which will allow you to eat the essence of the day in the most energetic time to consume.