Worrying about what to eat every day is really a very painful thing, so Xiaobian often thinks why people eat? In fact, eating is a kind of instinctive reaction. The body will consume a certain amount of energy. After energy consumption, people will feel hungry. In addition, people will think that it is time to eat.
Why do people eat every day? Will people die if they don't eat? The meaning of eating
From the point of view of nutrition, people eat for health. The growth of all things depends on nutrition, and the relationship between nutrition and life is inseparable. Without life, of course, nutrition is impossible to talk about, but without food nutrition, life cannot exist. But we carefully study that the purpose of people's meals actually changes with the change of social and economic conditions.
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In the era of food shortage, the only purpose of eating is to fill the stomach, not to be starved to death, and there is no condition to consider other things; but with the development of economy, the food supply is greatly enriched, and the purpose of eating is not only to fill the stomach, but also to meet the body's needs for various nutrients; Now the purpose of people's eating has been raised to a higher level, that is, to consider the health function of food. Through food, we can achieve the purpose of health care, prevention and treatment of various diseases.
In general, food has the following functions in the human body:
1. To maintain life and health, what activities need energy, such as heart beating, breathing, thinking, maintaining normal body temperature, food intake, excretion, etc., all need to consume energy. These energy comes from the metabolism of the food we eat every day. If we can't continuously supplement food, people will starve to death; In addition, we need nutrients for the growth of our hair and nails, the metabolism of our skin and intestinal wall, and so on. These nutrients come from the food we eat every day. I just listed some simple phenomena. In fact, any life activity needs food. In short, if there is no food supply, there will be no continuation of life and no health.
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2. To ensure normal growth and development, a child only weighs about 3 kg at birth and is about 50 cm long. After more than 10 years of growth, he will become a very tall young man. Where does his extra things come from is from the food provided every day. Without food, he will not grow up; Another boy grows into a man, and a girl grows into a big girl. Great changes have taken place in the process. For example, the emergence of the second sexual sign depends on food, which provides the raw material for the synthesis of hormones.
3. To supply the body with labor energy, we have to work and study every day. These activities need a lot of energy. The energy needs are related to the intensity of labor, the proficiency of operation and the working time. The greater the labor intensity is, the less skilled the operation is, and the longer the labor time is, the more energy is needed. These energy comes from our daily intake of food, some components of food in the body after oxidative phosphorylation can provide us with energy, so that we can work normally, life and study.
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