Which of the following is considered a normal result for a fasting glucose test?

• A. Under 70 mg/dL
• B. Under 90 mg/dL
• C. Under 100 mg/dL
• D. Under 130 mg/dL

Answer: (C)

A normal fasting glucose level is defined as being less than 100 mg/dL. This measurement is significant as it helps in the assessment of glucose metabolism and is critical in diagnosing diabetes and other glucose-related conditions.

Fasting glucose levels that are under 100 mg/dL indicate that the body's insulin response and glucose regulation are functioning adequately. Levels that reach 100 mg/dL or higher may indicate prediabetes or diabetes, thus marking the importance of maintaining levels below this threshold for overall health.

Other options present values that do not align with standard definitions: under 70 mg/dL is considered hypoglycemic, while under 90 mg/dL may be on the lower end of normal but is not widely accepted as the cutoff for normal fasting glucose. An upper threshold of under 130 mg/dL strays into the range that is potentially indicative of impaired glucose tolerance.