On the importance of rational nutrition to human health

In order to maintain life and health, human beings must get all kinds of nutrients necessary for human body from food every day. In the past, many people often paid attention to the harm of malnutrition, thinking that insufficient nutrition would lead to weakness and affect human health; On the contrary, we don't know enough about the harm of overnutrition and unbalanced nutrition. For a simple example, in the past, people often thought that obesity was a symbol of good nutrition and health, but in fact obesity was the result of nutritional imbalance caused by excessive calorie intake. Obesity has many hazards, which weaken the activity ability, and is also closely related to cardiovascular diseases such as hypertension, hyperlipidemia, coronary heart disease and diabetes. Therefore, we should pay attention to reasonable nutrition, that is, the nutrients intake from food every day should be moderate, neither lacking nor excessive. Lack can not meet the needs of physical activities. In severe cases, it can cause physiological function changes and abnormal biochemical activities, and even abnormal body morphology and structure, affecting human health; It can also cause abnormal changes in the body, or accumulate too much in the body, or interfere with the utilization of other nutrients, so that the metabolism is abnormal, and sometimes even poisoning occurs. The harm to the human body must not be underestimated.