There are many varieties of fruit, and its color and flavor can give people a sense of pleasure, for the enrichment of human life, enriching the content of the diet, to enhance appetite, etc., have a unique role. The nutritional value of fruits is similar to that of colorless vegetables. Contains a lot of water, less protein, very low fat content, sugar content in 5 ~ 20%.

Ripe fruits contain mainly fructose and sucrose. The immature fruits contain starch. Inorganic salts, B vitamins and carotene in fruits are very little, the main component contained is vitamin C. Prickly pear, fresh prickly, hawthorn, sea buckthorn, millets, citrus, orange grapefruit, lemon, etc., containing vitamin C is extremely rich. As fruits generally do not need to be cooked and processed, they can be eaten raw, and the vitamin C contained can enter the body without loss, so they are an excellent source of vitamin C, which has good effects on elderly patients.

The cellulose, hemicellulose and pectin in fruits have cholesterol-lowering and laxative effects. Excessive consumption of fruits can lead to diarrhea in people who are too sensitive to intestinal stimulation.

Fruits contain a variety of organic acids, and the unripe ones are particularly acidic. During ripening, the content of organic acids decreases and the amount of sugar increases. The presence of organic acids facilitates the preservation of vitamin C. Human consumption of organic acids can promote the secretion of digestive juices to increase, enhance appetite and facilitate digestion. In the process of metabolism, organic acids are oxidized, or transformed into other substances and excreted by urine, which will not affect the acid-base balance in the body. Fruits are rich in potassium, which has the effect of counteracting salt to lower high blood pressure, and eating more fruits can prevent hypertension. The role of fruit in nutrition, similar to five-color vegetables, so the lack of fruit, you can use vegetables instead, but the nutritional value of fruit is not as good as dark vegetables, so you can not use fruit to replace all vegetables.

Dried fruits are processed and dried from fresh fruits, the flavor is unique and easy to preserve and transport. Dried fruit in vitamin c is not as much as fresh fruit, while calcium, iron and other inorganic salts are relatively more, often eaten dried fruit are raisins, persimmon biscuits, red dates and lotus seeds.

Candied products are made of fresh fruit by candied, both to improve the flavor and easy to preserve, but these foods are still perishable, so you should pay attention to the shelf life.

Fruits are easily contaminated by bacteria, insect eggs and pesticides during the process of growing, harvesting, transporting and selling, so they should be rinsed thoroughly with flowing clean water before consumption, then peeled and eaten. Some fruits, such as strawberries and grapes, can be washed with water and soaked in light salt water for a while, or washed with non-toxic cleaning solution before eating.

Although the fruit is beneficial to human health, but can not eat too much, including lychee, cinnamon, orange, eat more will be "on fire", causing dry mouth; watermelon eat too much, will cause diarrhea; persimmon contains a lot of tannin, persimmon gum phenol, over-eating or fasting, will lead to constipation, or in the stomach and gastric acid generation of gastric persimmon stone, causing severe If this happens, you can take soda tablets to dissolve; unripe bananas, which contain more starch, are not easy to digest and should not be eaten. For the elderly, special attention should be paid to the amount of fruit and the time to eat.