24-Hour Urinary Aldosterone Concentration
This test measures the amount of aldosterone, a hormone that helps regulate blood pressure and fluid balance, in your urine over a 24-hour period.
["Helps assess how well your body controls blood pressure and fluid balance."]
Key facts at a glance
- LOINC
- 25896-2
- Short code
- D-ALA 24h Ur-sCnc
- Synonyms
- D-ALA 24h Ur-sCnc
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your doctor may order this test if they suspect conditions like primary aldosteronism (a hormone disorder that can cause high blood pressure), adrenal gland issues, or other disorders affecting your body’s sodium and potassium balance. It can also help diagnose or monitor conditions like hypertension (high blood pressure) or certain kidney problems.
What to Expect Before the Test
No special preparation is needed, but you’ll collect your urine for 24 hours in a container provided by your healthcare team. You’ll need to urinate every time, including at night, and discard the first morning urine. The test measures the total aldosterone excreted in your urine over the full day.
What to Expect During the Test
You’ll likely be given a clean container to collect all urine for 24 hours. Your urine samples are then sent to a lab for analysis. The test is painless and does not require any special equipment at home.
What to Expect After the Test
After completing the urine collection, your results will be reviewed by your doctor. They may compare your aldosterone levels to your blood pressure and other health factors to determine if further testing or treatment is needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High aldosterone levels in urine may indicate conditions like primary aldosteronism, which can cause high blood pressure, low potassium levels, or other complications. Low levels might suggest adrenal insufficiency or other hormonal imbalances. Your doctor will use these results alongside other tests and symptoms to guide diagnosis and treatment.
Short name
24h Urine Aldosterone
Frequently asked questions
What does a high aldosterone level mean?
What if my results are normal?
How often will I need 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