Serum/plasma mass concentration of aldosterone
This test measures the amount of aldosterone, a hormone produced by your adrenal glands that helps regulate blood pressure and fluid balance.
["Aldosterone helps control how much sodium and potassium your body retains, affecting your blood pressure and fluid levels."]
Key facts at a glance
- LOINC
- 24336-0
- Short code
- Gas Pnl BldA
- Synonyms
- Gas Pnl BldA
- 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 aldosterone testing to diagnose conditions like primary aldosteroneism (Conn’s syndrome), adrenal tumors, or to evaluate symptoms such as high blood pressure, low potassium levels, or unexplained fluid retention.
What does the test involve?
A blood sample is taken from a vein in your arm. The blood is then sent to a lab where it is analyzed to measure aldosterone levels. No special preparation is usually needed, but you may be asked to avoid certain medications or foods for a few days before testing.
What do the results mean?
Results are compared to standard reference ranges to identify if aldosterone levels are too high or too low. High levels may indicate conditions affecting your adrenal glands or blood pressure, while low levels might suggest other hormonal imbalances.
Common conditions linked to aldosterone testing
High aldosterone levels can lead to conditions such as hypertension (high blood pressure), hypokalemia (low potassium), and fluid retention. Low aldosterone levels may be associated with adrenal insufficiency or other endocrine disorders.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Aldosterone plays a critical role in maintaining electrolyte balance and blood pressure regulation. Abnormal levels can cause serious health issues, including heart problems, kidney issues, or hormonal imbalances. Your doctor will discuss the results and next steps based on your symptoms and medical history.
Short name
Aldosterone (serum/plasma)
Frequently asked questions
What causes aldosterone levels to be tested?
How long does it take to get aldosterone test results?
Can I eat or drink anything before this test?
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