For people with high blood pressure, hyperlipidemia and other problems, good digestive function and very strong appetite, it is best to eat fruit before meals. Because eating fruit at this time can first introduce some foods with low fat, large volume, high potassium and low sodium into the stomach, which is conducive to reducing the rush to eat too many foods with high fat, high calorie and high sodium. This is good for losing weight and controlling blood pressure. For people with poor digestive function, weak body and poor appetite, it is best to eat fruit after meals. Because eating fruit before meals will reduce the appetite and digestive ability when eating, it is not suitable for people with indigestion and easy stomach blockage and bloating. In addition, some people are afraid of cold, have sensitive intestines and are prone to diarrhea, so they are not suitable for eating fruits before meals.

Many ingredients in fruit are water-soluble, including vitamin C, soluble plant fiber and pectin, which can reduce the cholesterol level in blood. Its digestion and absorption do not need complicated digestive juice mixing, and it can be quickly absorbed into the small intestine through the stomach. The absorption rate of eating fruit on an empty stomach is much higher than that after meals. Secondly, eating fruit before meals is conducive to the grasp of "eight points full" in a healthy diet. Fruit is a low-calorie food, and its average calorie is only about 1/4 of the same weight of pasta and110 of the same weight of pork. It is easier to grasp the total intake by eating advanced low-calorie foods.

Because fruit contains organic acids, tannins, fructose and other substances that stimulate the gastrointestinal tract, for people with poor gastrointestinal tract, eating fruit on an empty stomach before meals is easy to aggravate the stimulation to the gastrointestinal tract and produce symptoms such as abdominal pain and diarrhea. Moreover, some fruits contain tannic acid, such as persimmons, which are often used as negative teaching materials. As long as healthy people don't eat too many persimmons, they won't have stomach stones. However, if people with bad stomachs eat persimmons on an empty stomach and drink yogurt to stimulate gastric acid secretion, such examples of stomach stones will appear in the news.

For ordinary healthy people, eating fruit before meals helps digestion. For people who lose weight, eating fruit before meals can enhance satiety, reduce the intake of other foods and increase the intake of vitamins and minerals. However, this does not mean that you can eat more fruits, because they help you lose weight. First of all, the sugar in fruit can be converted into fat; Secondly, eating too much fruit and eating too little other food can easily lead to imbalance in nutrient intake and malnutrition. According to the Dietary Guidelines for China Residents (20 16), it is recommended that the daily fruit intake of healthy people over 2 years old is 200 ~ 350g. Therefore, it is suggested that the daily fruit intake of dieters should be below the limit.