Drink 1 glass of water before meals, which can not only relieve gastrointestinal dehydration, but also promote gastrointestinal peristalsis, gastric emptying and stimulate appetite.

2. supplement vitamin B 1.

Drinking a lot of water and cold drinks in summer is easy to wash the vitamin B family out of the body because of sweating, leading to loss of appetite. Therefore, vitamin B 1 in the vitamin B family is the matchmaker that converts carbohydrates in food into glucose, providing the energy needed for the operation of the brain and nervous system; Without it, although I eat as usual, I have insufficient energy in my body and feel listless. The most abundant source of vitamin B 1 is all cereals, such as wheat germ, soybean and brown rice. Because seeds need this vitamin when they germinate. Pork is the most abundant meat.

3. Supplement vitamin B2.

Vitamin B2 is responsible for converting heat energy, which can help the body release energy from protein, carbohydrates and fats. Vitamin B2 is even more needed in summer with high activity, because a study by Cornell University in the United States found that the demand for vitamin B2 increased with the increase of activity. The best food sources of vitamin B2 are dairy products, such as milk and cheese, and green vegetables, such as broccoli and spinach.

4. Supplement vitamin B3 (nicotinic acid).

Vitamin B3, together with vitamin B 1 and vitamin B2, is responsible for carbohydrate metabolism and provides energy. Lack of vitamin B3 can cause anxiety, anxiety and irritability, so people often feel irritable in summer. Foods rich in vitamin B3 include mackerel, herring, chicken and milk.