Apples contain dietary fiber, which is beneficial to gastrointestinal peristalsis and helps to detoxify. Calcium in apples contributes to the metabolism of excess salt in the body and helps to eliminate edema caused by high salt. Malic acid can metabolize calories in the body and prevent obesity in the lower body; Pectin can also promote the excretion of lead, mercury and manganese in gastrointestinal tract, regulate the blood sugar level of human body and prevent the sudden rise and fall of blood sugar. Apples are rich in potassium, which can not only relieve edema caused by excessive sodium intake, but also have diuretic effect.

2. Lemon

Lemon contains organic acids such as citric acid and malic acid, and flavonoid glycosides such as hesperidin, naringin and eriocitrin. It also contains vitamin C, vitamin B 1, vitamin B2, nicotinic acid, sugar, calcium, phosphorus, iron and other nutrients, as well as coumarin, sitosterol, volatile oil and other substances, which can promote the secretion of protein-decomposing enzyme in the stomach, increase gastrointestinal peristalsis and help digestion and absorption.

Lemon juice has a strong bactericidal effect and the function of inhibiting uterine contraction, and can reduce blood lipid and play a role in losing weight. Lemon also has a cosmetic effect, which can prevent and eliminate skin pigmentation and make skin smooth and tender. Lemon is very alkaline and is considered to be a good medicine for all diseases. It can relieve cough and eliminate phlegm, promote fluid production and strengthen the spleen, which is of great help to human blood circulation, promote metabolism and improve weight loss. Lemons are rich in vitamin C, which can lower cholesterol.

3.pineapple

As long as pineapple is rich in bromelain, also known as bromelain, which has the function similar to papain, it can decompose protein, effectively dissolve fat, especially contribute to protein digestion of meat and reduce the body's absorption of fat. A large amount of protease and dietary fiber in pineapple can help gastrointestinal digestion, and because of its large volume and good adsorption, dietary fiber can take away excess fat and other harmful substances in the intestine, which has a significant effect on preventing and relieving constipation symptoms.

How to eat? Before eating pineapple, nail it and soak it in salt water. After soaking, cut into granules, put them in cheese or soft ice cream, and eat them after freezing. At the same time, it can play the role of clearing away heat and quenching thirst, promoting digestion and diuresis. You can also eat pineapple as a staple food, eating more than half a catty at a time for 7 days in a row, which will have a very good effect.

4, watermelon: sweet and cold, with the functions of clearing away heat and relieving summer heat, purging fire and relieving annoyance, appetizing and promoting digestion, and diuresis.