This test measures the level of protein C in your blood. If you have too little protein C, called a protein C deficiency, it means that your blood may clot too much.

This blood test measures proinsulin, a building block for insulin. Measuring proinsulin in your blood can help figure out your risk for type 1 or type 2 diabetes.

The prealbumin screen is a blood test to see whether you are getting enough protein in your diet.

This test measures the amount of potassium in your blood. It's often part of a routine blood test to check your level of electrolytes.

A cocaine screen is a test done to find out whether you have used cocaine recently. The test can be done on your urine, saliva, blood, hair, or sweat.

This test looks for toxic chemicals in your blood. These chemicals are most often found in insecticides, either those used in fields or those used in bug sprays.

This test measures the amount of cholesterol in your blood to help determine your risk for heart disease.

This test measures the amount of chloride in your urine. Knowing your chloride level is useful if you have a condition called metabolic alkalosis.

This test measures the levels of catecholamines in your blood. The catecholamine hormones are adrenaline (epinephrine), norepinephrine, and dopamine.

This test measures the amount of a substance called carnitine in your blood. Carnitine makes it possible for your body to digest fatty acids.