Winter jujube is a kind of fruit, it can give the human body to provide certain energy, vitamins and minerals and other nutrients needed by the body, there is no seven efficacy said. 1. Provide a certain amount of energy: human life activities need energy, per 100 grams of carbohydrates 27.8 grams, 1.8 grams of protein, can provide heat 476 kilojoules, jujube sugar content is high, diabetic patients need to eat in moderation. 2. Provide a certain amount of vitamins and minerals: per 100 grams of winter jujube has vitamin C243 mg, potassium 195 mg, magnesium 17 mg, calcium 16 mg and other nutrients, in the same kind of food in the vitamin C content of the front, can be used as a vitamin C food source. Per 100 grams of winter jujube contains 3.8 grams of total dietary fiber, excessive consumption may affect the digestion and absorption of the gastrointestinal tract, abdominal pain, diarrhea and other discomforts, it is recommended that the adult daily fruit intake of 200-350 grams, and alternate with other fruits.