What defines hypoglycemia?

Hypoglycemia is characterized by abnormally low blood sugar levels, which is critical for understanding the condition. When blood glucose levels fall below the normal range, it can lead to various symptoms such as sweating, shaking, confusion, and even loss of consciousness if not addressed quickly. The body relies on glucose as a primary energy source; therefore, maintaining adequate levels is essential for proper functioning.

Elevated blood sugar levels would be indicative of hyperglycemia, a different metabolic state, while normal blood sugar levels are neither hypoglycemic nor hyperglycemic. High cholesterol levels, although they can impact overall health and may be related to other conditions, do not define hypoglycemia. The focus on glucose levels is what makes the correct answer clear and relevant to the condition itself.