Serum or Plasma Substance Concentration of Aldosterone (Mass Concentration)

Why This Test Might Be Ordered

Your doctor may order this test if you have symptoms like high blood pressure, low potassium levels, or signs of conditions such as primary aldosteroneism (Conn’s syndrome), adrenal insufficiency, or certain kidney or heart problems. It may also be used to monitor treatment for conditions affecting hormone balance.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications or foods that could affect results, such as salt intake or some supplements. If you’re taking medications like potassium-sparing diuretics, inform your healthcare provider before testing.

How the Test Works

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where it is analyzed to measure aldosterone levels using a sensitive detection method, often a specialized immunoassay or chemiluminescent assay.

What the Results Mean

Results are typically reported as a concentration value, but exact reference ranges can vary by lab. High aldosterone levels may indicate conditions like primary aldosteroneism, while low levels could suggest adrenal gland issues or other hormonal imbalances. Your doctor will interpret results in the context of your symptoms and medical history.