Definitions for "Fasting blood glucose"
Blood-glucose concentration in the morning before breakfast. Commonly called fasting blood sugar (FBS).
A test to determine if blood glucose (sugar) levels are within a normal range following an overnight fast.
Blood glucose levels taken after not eating or drinking anything other than water overnight. A normal level is under 110, over 110 shows impaired glucose tolerance or insulin resistance, and over 126 is diabetic. Its ratio in comparison to fasting insulin can also indicate insulin resistance.