This test measures the levels of cardiac biomarkers in your blood. Some of these markers increase after you've had a heart attack.

This test measures a protein called carcinoembryonic antigen (CEA) in your blood. This protein is present on some types of cancer cells.

This test measures the amount of carbon dioxide in your blood. Normally, carbon dioxide in your bloodstream causes no problems, but if you have far too much or too little of it, you may have a disease or a medical emergency.

This is a 2-part test to look for THC, the active ingredient in marijuana, in your urine. It's considered quite accurate.

This test looks for harmful bacteria called Campylobacter in a culture sample from a bowel movement (stool).

This test measures the level of calcium in your urine. If too much calcium builds up in your urine, you may be at risk for kidney stones.

This blood test is used to evaluate your body's production of insulin. It's used to help diagnose blood sugar disorders, such as diabetes.

This test looks for minuscule amounts of albumin in your urine. The test can find out if diabetes has damaged your kidneys.

This test measures the amount of a substance called methylmalonic acid (MMA) in your urine. It can help diagnose a B-12 deficiency.

This test measures the amount of a substance called methymalonic acid (MMA) in your blood. Higher levels may mean you have a vitamin B12 deficiency.