Drinking apple cider vinegar is good for health, but it is not recommended to drink apple cider vinegar before going to bed. The hazards of drinking apple cider vinegar before going to bed to human body are as follows: Firstly, apple cider vinegar is an acidic beverage, and taking it orally for a long time before going to bed will cause acid reflux, heartburn, nausea, vomiting and so on in the stomach mucosa. Especially for those who had gastric mucosal reflux gastritis, bile reflux gastritis, gastric mucosal erosion and gastroduodenal ulcer, if you take apple cider vinegar before bed for a long time, it will induce gastric mucosal erosion and exudation, and even upper gastrointestinal bleeding. Secondly, drinking apple cider vinegar before going to bed will cause paroxysmal hypoglycemic reaction at night, and apple cider vinegar has very good effect of lowering sugar. If a large amount of apple cider vinegar is drunk before bed for a long time, it is easy to reach the most vigorous point of apple cider vinegar metabolism in the body after four hours, that is, the dawn phenomenon occurs around three o’clock in the morning, that is, paroxysmal hypoglycemia at night, apple cider vinegar is recommended to be taken orally thirty minutes after lunch, but it is not recommended to drink it before bed.