1, human life must be maintained through the diet, the quality of life and mental psychology and diet and nutrition have a great relationship, the human intellect, physical strength, learning ability, athletic ability, ability to prevent disease, rehabilitation, reproductive capacity, life expectancy, height, weight and nutritional diet are inextricably linked. Unbalanced intake of nutrients will cause many diseases. Therefore, rational nutrition and balanced diet is an important measure to prevent diseases.
2, the relationship between rational nutrition and human health, nutrition is a living organism from the outside world constantly take the required substances to maintain the process of life activities. For people, nutrition is from the outside world to take in food, after digestion and absorption of food in the body need to maintain the whole process of life activities, the body to maintain normal growth and development of metabolism of the substances required, called nutrients.