Glucose, Plasma
Fasting Required: Yes, 10-12 hours

Specimen: Blood

Lab: Quest Diagnostics

Results: 1-2 business days

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Description: Glucose is the primary energy source for the body’s cells and the only energy source for the brain and nervous system. This test may be used to screen for both high blood glucose (hyperglycemia) and low blood glucose (hypoglycemia), help diagnose diabetes, and to monitor glucose levels in persons with diabetes. Serum glucose has been found to be 2-5% higher than plasma glucose.