Hypoglycemia is defined as a blood glucose below:

• A. 70 mg/dL
• B. 60 mg/dL
• C. 80 mg/dL
• D. 90 mg/dL

Answer: (A)

Hypoglycemia is defined as blood glucose falling below about 70 mg/dL, a level chosen because when glucose dips under this point, brain function can be affected and the body starts to show warning symptoms such as shakiness, sweating, and rapid heartbeat. This threshold provides a practical, consistent cut-off for recognizing and treating low blood sugar, especially in people with diabetes. It’s also useful to know that there’s variation among individuals, and some guidelines describe more severe hypoglycemia as glucose dropping below around 54 mg/dL or levels requiring assistance. In practice, if glucose is under 70 mg/dL, a quick-acting carbohydrate is usually given to raise the level promptly.