Fasting blood glucose of 7.0 mmol/L is not normal in 65 years old. The fasting blood glucose value of 65-year-olds is the same as the standard fasting blood glucose for normal people, and the normal fasting blood glucose range is 3.9mmol/L-6.1mmol/L. Diagnostic criteria for diabetes mellitus: diabetes mellitus can be diagnosed by fasting blood glucose ≥7.0 mmol/L, or 2-hour post glycemic load blood glucose ≥11.1 mmol/L, or random blood glucose ≥11.1 mmol/L, accompanied by three more and one less symptom (more drinking, more eating, more urination, and weight loss). With the age of 65 years old, pancreatic function can gradually decline, so 65 years old people fasting blood glucose is easy to exceed the normal range, fasting blood glucose 7.0 mmol / L, it is recommended to avoid eating foods high in sugar, salt and fat, try to focus on low-sugar, low-fat food, and monitor the postprandial blood glucose, and under the guidance of the doctor’s treatment.