What is the appropriate adult reference range for fasting blood glucose?

The appropriate reference range for fasting blood glucose in adults is 65-99 mg/dL (3.61-5.50 mmol/L). This range is established based on various studies and guidelines that indicate the optimal glucose levels for individuals who have not eaten for at least eight hours.

A fasting blood glucose level below 70 mg/dL is generally considered hypoglycemic, while levels above 100 mg/dL may suggest impaired fasting glucose and potentially indicate a risk for diabetes. Maintaining glucose levels within the specified range is crucial for metabolic health and helps in the screening and diagnosis of diabetes mellitus.

By understanding this range, healthcare providers can effectively assess an individual's glucose metabolism and overall health. Thus, option C accurately reflects the medically recognized standard for fasting blood glucose in adults.