Banana is one of the most popular fruits among people. It mainly grows in the tropical and subtropical regions. Because it can relieve the depression, so the Europeans call it as "happy fruit". What's more, it is the favorite fruit for the girls who want to lose weight. Banana is also known as "fruit of wisdom", because there is a legend that the Buddha Sakyamuni gained the wisdom because of eating bananas. Banana is rich in nutrition but low in calories. It contains a variety of nutrients, such as proteins, sugar, potassium, vitamin A, vitamin C, cellulose, and so on. So it is known as a good nutritious food. Dutch scientists point out that, because banana contains pantothenic acid, which is known as the "happy hormone" of human body, so it can eliminate psychological stress, relieve depression, and make people happy. Banana has a lot of health-care effects on human body. First of all, it can prevent stroke and high blood pressure, so as to protect the health of blood vessels. U.S. scientists have confirmed that: if you keep eating two bananas every day for one week, it can bring down the blood pressure by 10%. Secondly, banana contains a great amount of vitamin A, which can effectively maintain the health of the skin, and make the skin smooth, soft and delicate. Thirdly, banana is also a good fruit for weight loss. In the busy life, more and more people begin to use health food or supplements to lose weight, while banana is one of such kinds of food for weight loss. It contains almost all the vitamins and minerals needed by human body. It is rich in dietary cellulose but low in calories. As a result, banana has become the best fruit for the women who want to lose weight. What's more, bananas also has the effects of relaxing bowel, nourishing lungs and relieving the cough, clearing away the heat and expelling of the toxins, promoting digestion, and so on. In addition, eating bananas before going to bed can also play a sedative effect on the body. Generally speaking, banana is suitable for most people, especially for those who want to lose weight. However, it is suggested not to eat too much bananas each time, with one or two bananas every day. And there are some groups of people who should not eat too much bananas, such as those with excessive gastric acid, stomach pain, indigestion, diarrhea, and so on.