Angiotensin-Converting Enzyme (ACE) Level in Serum/Plasma

Why Is This Test Done?

Your healthcare provider may order an ACE test to investigate symptoms such as chronic cough, lung issues, or kidney problems. It’s also used in diagnosing conditions like sarcoidosis, certain cancers, and genetic disorders like lymphangioleiomyomatosis (LAM).

A blood sample is drawn from a vein in your arm. The blood is then processed to separate serum or plasma for testing. The sample is analyzed using an immunoassay method to measure ACE levels.

ACE is typically measured in units per liter (U/L) or nanograms per milliliter (ng/mL), but reference ranges vary by lab and may not be provided in this summary.

Results may be above, below, or within normal ranges depending on your health status. Elevated ACE levels can suggest conditions like tuberculosis, lymphangioleiomyomatosis, or certain cancers. Lower levels might indicate liver disease or other metabolic issues. Always discuss results with your doctor.

ACE levels can fluctuate due to factors like medications, pregnancy, or recent infections. Your doctor will consider these factors when interpreting your results.

High ACE levels are often associated with tuberculosis, sarcoidosis, or certain cancers. Low ACE levels may be linked to liver disease, kidney problems, or other metabolic conditions. Your doctor will use these results alongside other tests and symptoms to guide diagnosis.

ACE testing is not typically used for routine screening but may be part of a broader evaluation for specific symptoms or suspected conditions.