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 in your urine. It can help diagnose a vitamin 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 B-12 deficiency.

This test measures the substances metanephrine and normetanephrine in your blood. It helps find out if you have a tumor of the adrenal glands.

This urine test measures the amount of metanephrines your body makes over a 24-hour period.

This test measures the amount of mercury in your urine. Long-term exposure to mercury can cause kidney and brain damage.

This test measures the amount of mercury in your blood. You can be exposed to mercury from polluted air or water, if you work in an industry that still uses mercury, from eating fish that are high in mercury, and from some complementary and alternative health remedies.