Learn about the many tests and examinations your blood sample undergoes in a lab.

Following your doctor’s instructions is the most important part of preparing for a blood test. Other tips include sleeping well, staying hydrated, and avoiding certain foods and drinks. Learn more.

Lab testing provides doctors with essential information to help them diagnose and treat disease. Here’s what happens behind the scenes after you roll up your sleeve for a blood draw.

Normal blood test ranges Depending on the lab that analyzed your sample, the results from your blood test may be broken down into individual tests or collections of related tests called panels.