Serum/plasma substance concentration for aldosterone (measured via immunoassay)
This test measures the amount of aldosterone, a hormone that helps regulate blood pressure and fluid balance in your body.
["Aldosterone helps control how much sodium and potassium your body retains, which affects blood pressure and fluid levels."]
Key facts at a glance
- LOINC
- 25776-6
- Short code
- GH sp1 p chal SerPl-sCnc
- Synonyms
- GH sp1 p chal SerPl-sCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your doctor may order this test to check for conditions like primary aldosteroneism (Conn’s syndrome), adrenal insufficiency, or to monitor treatments for high blood pressure or kidney problems. It can also help diagnose conditions like hyperaldosteronism or adrenal tumors.
What Does a High or Low Level Mean?
High aldosterone levels may indicate overactive adrenal glands, which can lead to high blood pressure, kidney stones, or low potassium levels. Low levels might suggest adrenal gland problems or other hormonal imbalances.
Sample Preparation and Collection
This test requires a blood sample drawn from a vein in your arm. You may be asked to fast for a few hours before the test, depending on your doctor’s instructions. Avoid caffeine and certain medications for the recommended period.
What to Expect During the Test
The blood sample will be collected by a healthcare professional. You may feel a slight pinch, but it usually doesn’t cause discomfort. The sample is then sent to a lab for analysis using an immunoassay method.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Aldosterone plays a critical role in maintaining fluid and electrolyte balance. Abnormal levels can lead to serious health issues, including hypertension (high blood pressure), kidney disease, or electrolyte imbalances. Regular monitoring is important for patients with conditions affecting adrenal function or those on medications that influence aldosterone.
Short name
Aldosterone Level (Serum/Plasma)
Frequently asked questions
What causes abnormal aldosterone levels?
How long does it take to get results?
Your doctor’s instructions will specify fasting requirements, but generally, you may drink water unless told otherwise. Avoid caffeine, alcohol, and certain medications for the recommended period before testing.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy