1, a balanced diet is fundamental, undernutrition and overnutrition are both "enemies" of health, the index of calorie balance is to maintain standard weight, and obesity and emaciation are both unbalanced manifestations.
2, reasonable nutrition, that is, the diet must contain protein, fat, sugar, vitamins, inorganic salts and trace elements, water and dietary fiber and other essential nutrients, so as to ensure the balance between nutrients and avoid lack and surplus. The performance of nutritional imbalance is the decline of resistance, especially the performance of sub-health.
3, not partial eclipse, balanced diet requires that food can not be partial eclipse, because any kind of natural food can not provide all the nutrients needed by the human body, so it is necessary to emphasize overcoming the habit of partial eclipse and develop the habit of diverse and omnivorous diets.