People with diabetes can drink apple cider vinegar in small amounts when their blood sugar is under ideal control. If blood sugar is high or fluctuates greatly, apple cider vinegar is usually not recommended. Diabetes mellitus is a common chronic endocrine disease, and the typical clinical manifestations are excessive drinking, excessive urination, excessive eating and weight loss. Once diagnosed with diabetes, it requires not only medication, but also diet and exercise to control blood sugar in the body. At present, the common apple cider vinegar on the market contains more or less sugar, and belongs to the higher calorie drink. Therefore, if diabetic patients have poor blood sugar control and high blood sugar level, it is usually not recommended to drink apple cider vinegar, to avoid causing further increase of blood sugar and worsening of the condition. If diabetic patients’ blood sugar control is more satisfactory, they can drink some apple cider vinegar in small amount at this time to supplement dietary fiber and vitamins, and it is recommended to choose apple cider vinegar with less sugar content. In addition, apple cider vinegar has a certain degree of acidity, patients are advised to brush their teeth and rinse their mouths after drinking it, so as not to damage their teeth. In addition to paying attention to diet, diabetic patients also need to standardize the use of medication under the guidance of the doctor, and regular monitoring of blood glucose.