What is the optimal fasting blood glucose level?

The optimal range for fasting blood glucose is generally considered to be 3.9–6.1 mmol/L. This range is based on medical research and clinical practice, ensuring that blood glucose levels are neither too high nor too low, thus maintaining normal physiological functions in the body.

Fasting blood glucose refers to the blood glucose level measured after at least 8 hours without consuming any caloric food. It reflects the basal insulin secretion function and the liver's ability to regulate glucose. When fasting blood glucose falls within this range, it indicates that the body's glucose regulation mechanism is functioning normally.

The optimal fasting blood glucose range may vary slightly among different populations, such as the elderly, pregnant women, and individuals with diabetes. Therefore, in clinical practice, evaluation and adjustment should be made according to individual circumstances. Additionally, a single fasting blood glucose measurement cannot fully reflect overall glucose status; multiple measurements and clinical symptoms are usually required for a comprehensive assessment.

Maintaining fasting blood glucose within the optimal range is important for the prevention and treatment of metabolic disorders such as diabetes. In daily life, it is also essential to maintain a balanced diet, engage in appropriate physical activity, and undergo regular medical checkups to ensure stable and healthy blood glucose levels.