This test looks at how much of the enzyme LDH you have in your blood. Higher levels of this substance could mean you've had a heart attack or other tissue damage.

This test measures different isoenzymes in your blood. You may need this test if your health care provider wants to see if you have a blood disorder or tissue damage.

This test measures the amount of an enzyme in your cerebrospinal fluid. The test can help diagnose diseases and conditions that affect your central nervous system.

This test checks your urine for chemicals that might cause your body to form kidney stones.

This test checks the amount of ketones you have in your body. People with diabetes may have high levels of ketones.

This test measures ketones, a byproduct of digestion, in your blood. A high level of ketones is a potentially fatal complication of diabetes.

These tests measure the amount of iron in your blood and how well that iron moves through your body.

This test measures the level of iron in your blood. Having too little or too much iron can lead to health problems.

This is a blood test for pernicious anemia, which is caused by a deficiency of vitamin B-12.

This blood test looks to see how well your blood clots. The test is especially important if you take blood-thinning medicines.