A fasting blood test is a blood sample taken from a person who has not eaten for 8 to 12 hours. Usually, the blood sample is taken early in the morning.
Examples of blood tests that may be done after a period of fasting include fasting blood sugar (fasting plasma glucose) and lipid profile (cholesterol and triglycerides).
Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine
Specialist Medical ReviewerRhonda O'Brien, MS, RD, CDE - Certified Diabetes Educator
Current as ofNovember 14, 2014
WebMD Medical Reference from Healthwise