Hypoglycemia is defined as what?

• A. Abnormally low blood glucose level
• B. Abnormally high blood glucose level
• C. Low oxygen saturation
• D. High body temperature

Answer: (A)

Hypoglycemia means there is not enough glucose in the blood. Glucose is the body's main energy source, especially for the brain, so when levels fall below normal (commonly defined as below about 70 mg/dL in many guidelines), you get symptoms and may need treatment. That makes “abnormally low blood glucose level” the correct definition. The other options describe high glucose, low oxygen saturation, or high body temperature, none of which define hypoglycemia.