A banana a day can replenish some of the nutrients and energy needed for the body, but food is not a drug, and can not play the same effect as the efficacy and role of drugs.
Bananas belong to the food, food is not equivalent to the efficacy and role of drugs, but bananas contain vitamin A, vitamin C, vitamin B2, carotene, protein, carbohydrates, calcium, phosphorus, dietary fiber and other nutrients, eat a banana a day for the body to properly replenish nutrients and energy.
Eat a banana a day is conducive to replenish the body with the required nutrients, usually to control the intake of bananas, should not eat too many bananas at a time, so as not to cause bloating and other discomforts.