In recent years, based on relative researches, scientists have introduced some food which can enhance physical fitness and defer senility process.

First, mushroom
Mushroom contains plenty of nutrients such as inorganic substances, vitamins, protein and so on, which can enhance the immunity of human body. As mushroom is low in calories, so you don't have to worry about gaining weight, even if you eat it very often. What's more, mushroom is high in plant cellulose, which can prevent constipation and reduce blood cholesterol. The Vitamin C in mushroom is much higher than any other fruit, so it is helpful to promote the metabolism in the body.

Second, tomato
Tomato is rich in Vitamin C, which can improve the resistance of the body and prevent scurvy. Tomato has many functions such as preventing cancer, improving appetite, skin whitening and so on. However, there are some taboos you should pay attention to when eating tomatoes.
(1) Do not eat tomatoes together with cucumbers.
(2) Do not eat tomatoes with an empty stomach.
(3) Do not eat unripe tomatoes.
(4) Do not eat tomatoes which have been cooked too long.

Third, spinach
Spinach contains a lot of nutrients which are helpful to the beauty of skin, detoxification, vision, emotional stability and so on. It can make people far away from iron deficiency anemia. The folic acid in spinach is very important to pregnant women. Enough folic acid during pregnancy can not only avoid the birth of babies with developmental defects, but also can reduce the possibility of diseases such as leukemia and congenital heart disease of the newly born babies.

Fourth, chocolate
Chocolate has the sedation effect. What's more, its taste and flavor can stimulate the brain and make people feel happy. In addition, chocolate can protect our teeth, slowing down the formation of dental caries.

However, there are a lot of consumers who can't resist the good taste of chocolate. At the same time, they are worried that eating chocolate will gain fat. Experts think that obesity is caused by various factors. On the one hand, it may be caused by genetic defect; on the other hand, it may be caused by excessive food and inadequate exercises. Statistic shows that more than 95% of the obesity is caused by overeating and lack of exercises.

Experts suggest that people can appropriately eat some chocolate 15 minutes before exercises. It can provide the body with enough energy during the exercises and help the recovery of the body after the exercises. If you want to enjoy the good taste of food while not to gain weight, you should do more exercises.