Hypoglycemia overview

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Hypoglycemia is a medical term referring to a pathologic state produced by a lower than normal level of glucose (sugar) in the blood. The term hypoglycemia literally means "under-sweet blood" (Gr. hypo-, glykys, haima). No single glucose value alone serves to define the medical condition termed hypoglycemia for all people and purposes. Although 60 or 70 mg/dL (3.3 or 3.9 mmol/L) is commonly cited as the lower limit of normal glucose, different values (typically below 40, 50, 60, or 70 mg/dL) have been defined as low for different populations, clinical purposes, or circumstances.