Citrus is a fruit, and does not have any efficacy and effect, can not play the same as the efficacy and effect of drugs, but diabetic patients to the need to minimize the consumption. Citrus is rich in nutrients, such as dietary fiber, vitamins, etc. Each 100 grams of citrus contains 43 calories, of which 0.8 grams of protein, 10.2 grams of carbohydrates, 0.5 grams of dietary fiber, 0.1 grams of fat, Vitamin A82IU, Vitamin C35mg, Calcium 24mg, Iron 0.2mg. Proper consumption is conducive to supplementation and has certain nutritional value. However, in our daily life, the amount of citrus we consume and intake is limited and does not achieve any efficacy or effect. In addition, it should be noted that because of the sweet and sour taste of mandarin, containing a certain amount of sugar, it is not suitable for diabetics, and patients with gastritis, gastric ulcer, and excessive gastric acid should not consume too much, otherwise it may lead to aggravation of the condition.