Because immature bananas contain more tannic acid, they have astringent effect on digestive tract and inhibit gastrointestinal peristalsis. Bananas are stored in a ventilated place until there are dark spots on the skin, but it is best to eat when the internal texture has not changed.
Banana has the functions of moistening lung, moistening intestine, relieving alcoholism and lowering blood pressure. It is especially suitable for treating fever, constipation and hypertension. Many elderly people eat bananas because their intestines are dry for a long time, so they need to relax and chew less. Women often eat it, which can moisturize dry skin.
Nutritional value of bananas: bananas are high-calorie fruits, and the calorific value per 100g pulp is 378 joules. In some tropical areas, bananas are also used as the main food. The nutritional value of banana pulp is quite high. Every 100g pulp contains 20g of carbohydrate, 0.2g of protein/kloc-0 and 0.6g of fat. In addition, it also contains a variety of trace elements and vitamins. Among them, vitamin A can promote growth and enhance resistance to diseases, which is necessary to maintain normal fertility and vision. Thiamine can resist beriberi, stimulate appetite, help digestion and protect nervous system; Riboflavin can promote the normal growth and development of human body.