What is a normal range for adult serum glucose fasting?

What is a normal range for adult serum glucose fasting?

• A. 70–100 mg/dL (3.9–5.6 mmol/L).
• B. 90–110 mg/dL (5.0–6.1 mmol/L).
• C. 60–90 mg/dL (3.3–5.0 mmol/L).
• D. 110–140 mg/dL (6.1–7.8 mmol/L).

Answer: (A)

Fasting glucose is measured after at least 8 hours without eating. A normal adult fasting glucose is about 70–100 mg/dL (3.9–5.6 mmol/L). This range reflects values that are considered normal for most adults; levels below 70 mg/dL can indicate hypoglycemia, while fasting levels above 100 mg/dL—especially approaching or exceeding 125 mg/dL on repeated tests—point toward impaired fasting glucose or diabetes. So the 70–100 mg/dL range best represents normal fasting glucose.

Fasting glucose is measured after at least 8 hours without eating. A normal adult fasting glucose is about 70–100 mg/dL (3.9–5.6 mmol/L). This range reflects values that are considered normal for most adults; levels below 70 mg/dL can indicate hypoglycemia, while fasting levels above 100 mg/dL—especially approaching or exceeding 125 mg/dL on repeated tests—point toward impaired fasting glucose or diabetes. So the 70–100 mg/dL range best represents normal fasting glucose.