Serum or Plasma Aldosterone Concentration (Mass Concentration)

Why This Test Might Be Ordered

Your doctor may order this test to check for conditions that affect your blood pressure, such as primary aldosteroneism (a rare disorder where your adrenal glands produce too much aldosterone), or to evaluate symptoms like high blood pressure, low potassium levels, or signs of adrenal gland issues. It may also be used in diagnosing conditions like hyperaldosteronism or to monitor treatment for related disorders.

What to Expect Before the Test

No special preparation is usually needed, but your doctor might ask you to avoid certain medications or dietary restrictions for a few days before testing. If you’re taking potassium-sparing diuretics (like spironolactone), you may need to stop them temporarily or adjust your dose as directed by your healthcare provider.

What the Test Involves

A blood sample will be taken from a vein in your arm. You may feel a small pinch when the needle is inserted, but the procedure is quick and usually doesn’t cause discomfort afterward. The sample is then sent to a lab for analysis.

What the Results Mean

Results are compared to standard reference ranges, but they can vary slightly depending on the lab. High aldosterone levels may indicate conditions like hyperaldosteronism, while low levels could suggest adrenal insufficiency or other hormonal imbalances. Your doctor will discuss the results in the context of your overall health and symptoms.