Summer diet should be based on the principle of "nourishing yang in spring and summer" proposed in Huangdi Neijing. For the elderly, the focus of health preservation in summer is "nourishing yang", that is, people are required to follow the natural law of "spring dominates the rise and summer dominates the growth" and pay attention to nourishing yang in order to achieve the purpose of health preservation. Summer heat is the most harmful to the consumption of body fluid and gas. In addition, the capillaries on the body surface dilate, and the blood is mostly concentrated on the body surface. The relative shortage of gastrointestinal blood is more likely to cause indigestion and loss of appetite in the elderly. Therefore, the elderly should pay attention to the following principles in midsummer: the diet should be light and humid in hot season, which is prone to damp-heat syndrome. Old people often eat foods that clear away heat and relieve summer heat, such as mung bean soup, lotus seed porridge, chrysanthemum tea and sour plum soup. It can relieve summer heat, dry dampness, strengthen the spleen and benefit the stomach.

Suitable for the elderly who eat wonton, noodles and porridge, their physiological function is decreased, their spleen and stomach are weak, their gastrointestinal digestive function is obviously weakened, and they often lose their appetite. They are suitable for eating some warm, light, soft and digestible foods, such as noodles, noodles, mung bean porridge, celery porridge and so on.

Bitter and sour food should be eaten In summer, the elderly eat bitter food such as bitter gourd, chicken feathers, cactus and lettuce. These foods can dispel pathogenic heat, relieve fatigue, clear heart and improve eyesight; Bitter and sour foods can also prevent excessive sweating and have a astringent effect on sweat glands.

In midsummer, young adults should be properly nourished and have a strong metabolism. Generally, there is no need to take supplements in summer, while the elderly generally have a bad appetite in summer. Besides, they sweat too much. With sweat, not only water and salt are excreted, but also a certain amount of protein and vitamins, especially calcium and zinc. Therefore, the elderly should be properly nourished in midsummer and eat more lean meat, fish, eggs, melons, vegetables, American ginseng and astragalus. Avoid spicy food when eating. Eat less sweet, salty and greasy food, eat on time, eat more in small quantities, and don't overeat.

Old people who eat less cold food and cold dishes should eat fruits and cold drinks carefully so as not to hurt the yang of the spleen and stomach. For example, eat less cold salad and bean jelly, and don't drink too many cold drinks because of temporary pleasure; Don't be afraid to waste things, eat unheated leftovers, leftovers and spoiled food. It is necessary to control the "disease from the mouth".