This test measures the concentration of aldosterone, a hormone that regulates blood pressure and fluid balance, in the serum or plasma portion of your blood.

Why is this aldosterone test performed? This test is ordered to evaluate the level of aldosterone in your blood or urine, which assists your doctor in identifying potential issues with your adrenal glands and hormone balance.

Your doctor may request an aldosterone test to diagnose or monitor conditions such as primary aldosteronism (also known as Conn's syndrome), adrenal insufficiency, or to assess hormonal imbalances that could be influencing your blood pressure or kidney function. It can also be combined with other tests to evaluate hypertension or excessive mineralocorticoid activity.

What preparation is required before you undergo an aldosterone test? In most cases, no special preparation is needed. However, it is important to inform your healthcare provider about any medications you are taking, as certain drugs might affect the results.

No special preparation is needed for this test. If your sample is drawn from blood, you may have a small needle inserted into your arm, and you might feel a brief pinch. If it’s a urine sample, you’ll collect a sample over 24 hours, but no special diet or restrictions apply.

What happens during the aldosterone test? The procedure involves either a blood draw from a vein in your arm or a 24-hour urine collection, depending on which type of test your doctor has ordered. The sample is then sent to a laboratory for analysis.

For blood samples, a healthcare professional will draw blood from a vein in your arm, and the sample will be sent to a lab where the amount of aldosterone in your serum or plasma is measured. If a urine sample is required, you will collect all urine over a 24-hour period, and the lab will analyze it for aldosterone excretion.

What do the results of your aldosterone test mean? The reference range for aldosterone can vary between laboratories, so your doctor will compare your results to the specific range provided by the lab that processed your sample. This comparison helps determine if your aldosterone levels are within a normal, high, or low range.

Results are compared to reference ranges specific to your lab, which may vary. High aldosterone levels may indicate conditions like primary aldosteronism, while low levels could suggest adrenal gland issues or other hormonal problems. Your doctor will interpret results in the context of your overall health and symptoms.