Oolong tea leaves, as a kind of tea, do not have the effect of medicine, but can provide the body with carbohydrates, tea polyphenols and other nutrients. Every 100 grams of oolong tea leaves contain 320 calories, 59.2 grams of carbohydrates, 1.2 grams of fat, 26.5 grams of protein, 645 micrograms of vitamin A, 1934 milligrams of potassium, 378 milligrams of calcium. So tea can provide the body with more nutrients. Which contains potassium is especially high, tea belongs to high potassium food. At the same time oolong tea leaves also contain a variety of antioxidant substances, such as tea polyphenols, vitamin E, carotene and so on. Every 100 grams of oolong tea contains 3870 micrograms of carotene, the content of which is in the front of the food. Although oolong tea leaves are rich in nutrients, but there is no prevention and treatment of disease, and there is no effect of medicine. Oolong tea contains a certain amount of caffeine, so sensitive to caffeine, especially insomnia, is the need to properly control the intake of people.