Green juice is rich in dietary fiber and vitamins, which can reduce the absorption of sugar or fat and can effectively improve the glycemic index and prevent obesity. The best time to consume green juice varies, so you can choose the time to consume it according to the health care purpose. Drinking a glass of green juice in the morning after waking up can balance the pH of body fluids, and it can also have a cleansing effect, which can effectively eliminate toxins and waste from the intestinal tract, promote the elimination of constipation and improve constipation. In addition, you can drink a glass of green juice half an hour before dining, which can increase the feeling of satiety, reduce food intake, and can help to lose weight. In addition, drinking a glass of green juice about two hours before bedtime can regulate insomnia and dreaminess, which can help improve the quality of sleep. It should be noted that if there are patients with poor gastrointestinal function, it is not recommended to drink green juice, so as not to aggravate the discomfort of the stomach and intestines, which is not conducive to health.