Normal people are generally used to three meals a day, and how to arrange three meals a day is learned. Some families have very reasonable arrangements and eat a variety of patterns, while some families' diets are as simple as ever and the varieties are extremely monotonous. Three meals a day should not only be quantified regularly, but more importantly, it is necessary to ensure the supply of nutrition and achieve a balanced diet. Under normal circumstances, the nutrients needed for a day should be evenly distributed among the three meals. The calorie intake of each meal should account for about 1/3 of the total calories in the whole day, but lunch should not only supplement the calorie intake in the morning, but also provide energy for work and study in the afternoon, which can be more. Therefore, three meals a day should account for 25%-30% of calories for breakfast, 40% for lunch and 30%-35% for dinner. So, how to arrange three meals a day? People often say, "Eat well early, eat well at noon, and eat less at night". This kind of health care experience is reasonable. Breakfast should not only pay attention to quantity, but also pay attention to quality. The staple food generally includes starchy foods, such as steamed bread, tofu, corn flour steamed bread and so on. And some foods rich in protein, such as milk, soybean milk, eggs, etc. , should be properly supplemented, so that the blood sugar in the body quickly rises to normal or exceeds the normal standard, so that people are refreshed and can work and study energetically. Lunch should be more appropriate and of high quality. Staple food such as rice, steamed bread, corn cake, tofu, etc. And non-staple food such as fish, meat, eggs and bean products. And we should supplement fresh vegetables to keep the blood sugar in the body at a high level and ensure the work and study in the afternoon. Dinner should be light and easy to digest, at least two hours before going to bed. If you eat too much dinner and eat a lot of food containing protein and fat, it is not easy to digest, and it will also affect your sleep. In addition, people are not active at night, eating too much is easy to overnutrition, which will also lead to obesity, and may also cause fat to deposit on the arterial wall, leading to cardiovascular diseases, so three meals a day should be arranged reasonably. The dietary principle of scientifically matching three meals a day. People should eat three meals a day not only to fill their stomachs or hunger, but also to ensure the normal development and health of their bodies. Experiments show that the protein digestion and absorption rate in food is 85% for three meals a day; If it is changed to two meals a day, and each meal eats half of the whole day's food, protein's digestion and absorption rate is only 75%. Therefore, according to the living habits of our people, generally speaking, three meals a day is reasonable. At the same time, it should be noted that the interval between two meals should be appropriate. Too long an interval will cause a high degree of hunger and affect people's labor and work efficiency; If the interval is too short and the last meal has not been emptied in the stomach, then eating the next meal will make the digestive organs not get proper rest, and the digestive function will gradually decline, affecting appetite and digestion. Generally, the residence time of mixed food in the stomach is about 4-5 hours, and the interval between meals is 4-5 hours. If it is 5 ~ 6 hours, it basically meets the requirements. ◎ Biological clock and three meals a day: Modern research has proved that digestive enzymes in the human body are particularly active in the morning, noon and evening, which shows that when people eat is controlled by biological clock. ◎ Brain and three meals a day: The brain accounts for a large proportion of the daily energy consumption of the human body, and the energy supply of the brain can only be glucose, which is about110 ~145g per day. The liver can only provide about 50 grams of glucose per meal at most. Three meals a day, the liver can provide enough glucose for the human brain. Digestive organs and three meals a day: solid food takes about 30 ~ 60 seconds from esophagus to stomach, and reaches small intestine after staying in stomach for 4 hours. Therefore, the interval between three meals a day is 4 to 5 hours, which is also reasonable from the perspective of digestion. Choice of food for three meals: What food to choose for three meals a day, how to prepare and how to do it are all particular and vary from person to person. Generally speaking, the staple food and non-staple food for three meals a day should be matched in thickness, and animal food and plant food should have a certain proportion. It is best to eat some beans, potatoes and fresh vegetables every day. The scientific distribution of three meals a day is determined according to everyone's physiological condition and work needs. According to the amount of food, the ratio of breakfast, lunch and dinner is 3: 4: 3. If someone eats 500 grams of staple food every day, it is more appropriate to eat 150 grams in the morning and evening, and 200 grams at noon.