Iron (Blood)

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

International Normalized Ratio

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

Total and Free Insulin (Blood)

This test measures 2 types of insulin in your body: total and free. The test can help diagnose low blood sugar, or hypoglycemia.