Serum or plasma 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 in your body.
["Aldosterone helps control how much salt and water your body retains, which can affect your blood pressure and overall fluid levels."]
Key facts at a glance
- LOINC
- 107606-6
- Short code
- LPT CA Bld-aCnc
- Synonyms
- LPT CA Bld-aCnc
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 85610
- SNOMED
- 396252006
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why is this test done?
Your doctor may order an aldosterone test to check for conditions like primary aldosteroneism (also called Conn’s syndrome), adrenal gland tumors, or to evaluate symptoms such as high blood pressure, low potassium levels, or unusual thirst and urination patterns.
What does a high aldosterone level mean?
High aldosterone levels may indicate overactivity of your adrenal glands, which can lead to high blood pressure, low potassium, or other health issues. This can sometimes be caused by conditions like primary aldosteroneism or certain medications.
What does a low aldosterone level mean?
Low aldosterone levels may suggest adrenal insufficiency or other conditions affecting hormone production, though this is less common for aldosterone specifically. It could also be due to certain medications or medical treatments.
How is this test performed?
A blood sample is taken from a vein in your arm, and the sample is sent to a lab to measure aldosterone concentration. The test may be done in the morning for more accurate results.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical significance: Aldosterone plays a critical role in blood pressure regulation and fluid balance. Abnormal levels can lead to serious health problems, including high blood pressure, heart strain, or electrolyte imbalances. Your doctor will interpret results in the context of your symptoms and overall health.
Short name
Aldosterone level
Frequently asked questions
How long does it take to get results?
What should I do if I have questions about my 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