Serum or plasma mass concentration of aldosterone

This test is done to help your healthcare provider check how well your body is working, look for signs of illness, confirm or rule out a suspected condition, or monitor a health problem you already have. It may also be part of a routine checkup or used to see how well a current treatment is working for you.

Your doctor may order this test to diagnose or monitor conditions like primary aldosteroneism (hyperaldosteronism), adrenal insufficiency, or to check for hormonal imbalances affecting blood pressure or kidney function. It can also help evaluate symptoms such as high blood pressure, low potassium levels, or unexplained fluid retention.

Your result shows whether the measured value falls within the typical range for healthy adults. A value outside that range does not automatically mean you are sick, because many factors can affect it. Your healthcare provider will interpret the result together with your symptoms, medical history, and other test findings before deciding what it means for you.

Higher-than-normal levels may suggest conditions like aldosterone excess, which can lead to high blood pressure or low potassium. Lower-than-normal levels might indicate adrenal gland problems or other hormonal disorders. Your doctor will interpret results in the context of your overall health and symptoms.

The test is usually a simple procedure performed in a clinic, hospital, or laboratory. A trained member of the care team collects a small sample, such as blood or urine, using clean, sterile equipment. The sample is then sent to a laboratory where specialists analyze it, and the collection step itself usually takes only a few minutes.

A blood sample is taken from a vein in your arm. The sample is sent to a lab where it is processed to separate serum or plasma, then analyzed to measure aldosterone concentration using mass spectrometry.

Before the test, follow any specific instructions from your healthcare provider. You may be asked to avoid eating or drinking for a period of time, temporarily stop certain medicines or supplements, or drink extra water. Tell the care team about all medications you take, and let them know if you are pregnant or have any allergies.

Avoid taking certain medications (like some blood pressure drugs) that may affect aldosterone levels for a few days before testing. Also, inform your doctor about any supplements or over-the-counter medications you’re taking. You may need to fast for a set period, but your doctor will let you know.