Bananas are rich in potassium and are known as "leg experts", ranking first in food. Rich potassium can help stretch leg muscles, prevent leg cramps and relieve legs. At the same time, bananas are sweet and cold, and have high medicinal value. Eating a banana for breakfast, lunch and dinner can provide rich potassium, thus reducing the risk of thrombosis in the brain by about 2 1%. Its main functions are clearing stomach, treating constipation, clearing away heat and moistening lung, quenching thirst and polydipsia, replenishing essence and relieving hangover. Because bananas are cold, people with spleen and stomach deficiency, stomachache and diarrhea should eat less. Avoid eating on an empty stomach. If you use bananas instead of dinner, you can lose weight better. So don't exceed three a day.