Glucose Fasting (Blood Sugar Fasting)

Glucose Fasting, also known as Fasting Blood Sugar (FBS), measures the level of glucose in the blood after 8–12 hours of fasting. It reflects how effectively the body regulates blood sugar levels in the absence of recent food intake.

This test is a primary tool for diagnosing diabetes mellitus, prediabetes, and hypoglycemia. Elevated fasting glucose levels may indicate insulin resistance or impaired insulin production, while low levels may suggest excessive insulin activity or metabolic disorders. The test is commonly included in routine health checkups and is often interpreted alongside Postprandial Glucose, HbA1c, and Oral Glucose Tolerance Test (OGTT) results for comprehensive diabetes assessment.