Apples can be eaten at night on an empty stomach, apples are rich in many kinds of vitamins and minerals, which can achieve the effect of supplemental nutrition, are easy to digest food, will not cause a burden on the stomach, can not eat more, apples are cold food, eat more may cause stomach cold and other symptoms. Apples also belong to the acidic food, which contains malic acid, eating too much will cause excessive stomach acid, causing other adverse reactions. It is recommended to eat apples properly to achieve the role of vitamins and trace elements to strengthen the body, but also to eliminate toxins from the body, to achieve the effect of beauty. Patients with high blood sugar or gastritis or gastric ulcer are not recommended to eat apples. Apples contain more simple sugars, which are easily absorbed and may make blood sugar higher, and patients who do not mind having high blood sugar do not mind eating apples.