Do I need to fast before my annual physical?

Quick Answer

It depends on which labs are being drawn. A fasting lipid panel and fasting glucose both require 8 to 12 hours of no food (water is fine). If we're running an A1C, comprehensive metabolic panel, thyroid panel, or CBC, fasting isn't required. When you schedule your physical, we'll tell you exactly what to do. The simplest approach is to schedule a morning appointment and skip breakfast — that covers all fasting requirements.