What to Expect from a Laboratory Test
When scheduled for a laboratory test, you should know that fasting is typical for many such tests, meaning you aren’t allowed to eat or drink anything for 10 to 14 hours before collection. Your referring doctor or medical professional typically notifies you of this upon scheduling.
In most cases, blood is drawn from your vein in the arm with a needle injection. If you are normally apprehensive to needles or seeing your blood drawn, we recommend not focusing on the quick and seamless procedure. The most you should feel is a slight sting as the needle is inserted and extracted.