Citrus as a food does not have any efficacy and function, but citrus is rich in nutrients, can help the human body to replenish the required nutrients, has a certain nutritional value, can be consumed in moderation. Citrus is rich in vitamin C, fiber, carotene and other nutrients that are beneficial to the human body, which can help the body to supplement the required nutrients. Every 100 grams of mandarin oranges contain 51 calories, 11.9 grams of carbohydrates, 0.7 grams of protein, 0.2 grams of fat, 0.4 grams of fiber, 28 mg of vitamin C, 290 micrograms of carotene, 154 mg of potassium. And citrus contains a certain amount of dietary fiber, can stimulate peristalsis, promote digestion, help exhaust, constipation, flatulence and gas have some help. Citrus contains high sugar, diabetics can not eat. In daily life, you can moderate intake of citrus.