What should we do more and pay attention to if we want to be healthy?

To some extent, a healthy body lays the foundation for a happy life. An unhealthy body often limits a person's contact with others and greatly reduces his chances of getting close to nature, so it is easy to form a biased personality. You may also find that it is more difficult for weak people to form a positive self-image than healthy people. Don't care about your health only when you are sick, and don't think that improving people's health is just a doctor's job. You, a teenager, should improve your health by cultivating a healthy lifestyle. There is a famous saying in nutrition: What you eat is what your body is. In the impression of many people, "eating" seems to be an innate instinct. As long as you have a certain economic ability, you can eat whatever you want, which will provide sufficient nutrition for the developing body, but it is not. The principle of "balance and moderation" emphasized by nutrition is often destroyed by our bad eating habits. I don't know when we started to have a partial eclipse. Fish, eggs, milk, whole grains, vegetables and fruits, there are always some things that we try to avoid eating, and even we prefer to eat desserts. Over time, different degrees of malnutrition and diseases will find the "body". Is that weird? Don't! Because of partial eclipse or picky eaters, our bodies can't get enough nutrients necessary to maintain normal growth and metabolism. There are many kinds of nutrients needed for human growth and development. At present, 54 species have been found and confirmed, and the number is increasing. But in terms of chemical properties or physiological functions, it can be divided into six categories: protein, fat, carbohydrates, vitamins, minerals and water. Long-term lack of any nutrient in human body will lead to metabolic disorder, malnutrition and even disease. However, so far, scientists have not found that any single food can provide all the nutrients needed by the human body. More importantly, some nutrients are necessary to maintain the normal physiological and biochemical reactions of the human body, but they cannot be formed in the human body, such as most vitamins. They only exist in all kinds of food, and only when the food is properly matched can the human body get sufficient supply. In this sense, healthy eating habits are not "specialized" but "miscellaneous". For the sake of health, are you willing to "get close" to those foods that you have been ignoring? In addition, many of us often skip breakfast, but we eat a lot for dinner. This eating habit violates the principle of "moderation". Under normal circumstances, the energy gained by a person from dinner the day before has been basically exhausted after a night's consumption. If you don't replenish energy through breakfast in time, you may be very hungry after the second class in the morning and you can't hear what the teacher is saying at all. In addition, such irregular eating destroys the laws of gastrointestinal peristalsis and digestive juice secretion and cannot maintain the normal function of the digestive tract. It is easy to get digestive tract ulcers at a young age. A big meal is not good for health. Eating too much at dinner will not only increase the burden on the gastrointestinal tract and affect night sleep, but also increase the insulin content in the blood, which can easily convert blood lipids into fat and store it in the abdominal wall. Those students who "don't eat much but have big stomachs" may be overeating at dinner because of lack of breakfast and lunch. The eating habits based on the principle of "balance and moderation" require us to start with three meals a day, so as to "eat well early, eat well in the middle and have a light dinner" and not be partial to food. "Eat early and eat well" here means measuring enough samples. To this end, we need to know some basic knowledge of nutrition. We might as well divide all the foods we can touch into five categories: the first category of cereals mainly provides calories, carbohydrates and vitamin B1; The second category of meat, poultry, eggs, fish, milk and dairy products mainly provide protein, fat, calcium, phosphorus, iron and vitamins A, B2 and B 12, while the third category of beans and bean products mainly provide protein, fat, carbohydrates and B vitamins; The fourth category of fruits and vegetables mainly provides cellulose, minerals, vitamin C and carotene; The fifth category is animal oil, vegetable oil, refined sugar and alcohol. Can only provide pure fat, pure carbohydrates and calories, also known as pure calorie food. Among these five types of food, the first, third and fourth types of food can be freely ingested, the second type of food can be ingested in moderation, and the fifth type of food should be restricted. And choose different foods in each food every day. It should be pointed out that excessive intake of any kind of food or nutrients is not conducive to health. Salt provides essential sodium for human body to perform physiological functions. However, excessive salt is harmful to health. According to surveys in more than 50 countries and regions, the incidence of hypertension is very high in countries with high salt intake, such as Japan, South Korea, China, Colombia and Portugal. Therefore, in order to prevent diseases, we need to correct the habit of attaching importance to salt from adolescence. Besides, with the improvement of living standards, we have more opportunities to eat meat today than our parents did when they were children. Without the corresponding scientific knowledge, we are likely to get rich protein and eat too much fat at the same time. Nutritionists have found that besides obesity, the incidence of atherosclerosis, cardiovascular and cerebrovascular diseases and tumors is positively correlated with the amount of fat consumed in the body. Don't think that these diseases belong to middle-aged and elderly people. According to epidemiological studies, the incidence of these three diseases among young people is increasing year by year. If you want to prevent yourself from suffering from the above diseases after middle age, you should pay attention from now on. From a health point of view, eating meat should be selective. There is a saying in nutrition: four-legged ones are not as good as two-legged, and two-legged ones are not as good as those without feet. It is better to eat chicken than pork, beef and mutton, and fish than chicken. Eating tofu and soybean milk often is also a good choice. Vegetables contain a lot of vitamins. Unfortunately, these vitamins are easily destroyed by oxidation during cooking. In order to protect the vitamins in vegetables from being destroyed, eat them raw if you can; If you can't eat it raw, you can pay attention to it in the cooking process: wash it first and then cut it, stir-fry it with high fire and cook the soup.