It is known to all that the adequate intake of fruits is beneficial to the physical health of the human body, which can supplement abundant vitamins, fibers and antioxidants for people to prevent various diseases. However, it does not mean that people can eat fruits excessively with an easy mind. The excessive intake of fruits can cause various problems, such as obesity and decayed teeth.

Some people think that the supplementation of five kinds of vegetables and fruits each day can protect the health for the human body. However, the intake amount is reasonable just among people with normal weight. If people with heavy weight cholesterols eat too many fruits, various troubles may be caused. Some people may be puzzled by the fact that why their weight is always increased even when they keep a healthy living way. The true reason is that they have eaten too many fruits. Many people may be also puzzled by the reason. In fact, the fruits usually contain high content of fructose which will not make people feel full.

The nutritional experts think that when people are eating sugar, a kind of insulin will be released inside the human body which can send a full feeling to the brain. The high level of insulin will control the appetite. However, the fructose can render the production of insulin. Therefore, people always eat excessive fruits unconsciously.

What's more, the excessive intake of fruits can also destroy the human health. When people are chewing the fruits, sugar will be released inside the mouth to endanger the teeth. Some people like to brush their teeth immediately after they drink fruit juice. In fact, the teeth can be more seriously destroyed. When people brush the teeth at this time, the enamel can be removed. Therefore, the risks of getting decayed teeth among people can be seriously increased.

The scientists in America has conducted a kind of research among people without high blood pressure. The result has shown that the risks of getting high blood pressure can be increased 87% if people absorb more than 74 grams of fructose each day. The fruits like banana and strawberry all contain abundant fructose. That is to say it is easy for people to absorb more than 74 grams of fructose in everyday life.

Although fruits can supplement essential nutrients like vitamin E and calcium for the human body, people should keep a moderate intake amount of fruit so as to prevent possible harms and maintain the physical health to the full extent.