In the cold winter days, many people always feel weak, fatigue, sleepy, lack of power, and so on. Then how to improve this situation, and make yourself full of energy? Following are some kinds of best food for you.

First, spinach
Spinach contains a kind of mineral which the females are most likely to lack of--magnesium. Research shows that, if the daily intake of magnesium for women is less than 280 mg, they will feel tired and fatigue. The function of magnesium in the human body is to transform the carbohydrates contained in the muscle into the energy which can be utilized.

Second, banana
Banana is known as high-energy food. It not only contains carbohydrates which are easily absorbed by the body, but is also rich in . Potassium can help maintain the normal function of muscles and nerves. However, potassium can not be stored in the body for a long time. Studies have shown that, if there is a lack of potassium in human body, it may lead to muscle pain, irregular heartbeat, slow response, and so on. In such a case, eating a few bananas can supplement the deficiency of potassium.

Third, strawberry
Strawberry is rich in vitamin C, while vitamin C can promote the absorption of iron by human body, and provide the cells with enough nourishment. As a result, eating more strawberry can make people full of energy.

Fourth, tuna
Tuna contains plenty of protein and tyrosine. In human body, tyrosine can help the brain produce neurotransmitter, which can make people attentive and think quickly.

Fifth, cereal
Nutritionists point out that, fiber can slow down the speed of digestion, and supply a lot of carbohydrates to the blood vessels, so that the body can get energy continuously. Oatmeal contains a large number of fibers, so it can release out the energy slowly, and make the level of blood sugar stay at a high level all the time. As a result, you will not feel hungry quickly and can be full of energy during the whole day.

Sixth, yogurt
Many women tend to feel lack of power and sleepy during the menstrual period. One study shows that, eating calcium-rich foods such as yogurt, can significantly improve this situation. If you eat three small glasses of yogurt, it can relieve symptoms such as abdominal pain, fatigue, irritability and so on. This is because calcium has the effect of relieving the tension of muscle and regulating endocrine.