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Serum or plasma mass concentration of aldosterone

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of aldosterone, a hormone that helps regulate blood pressure and fluid balance in your body.

Quick summary

["Aldosterone helps control how much sodium and water your body retains, which can affect your blood pressure and heart function."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
27842-4
Short code
GH sp19 p chal SerPl-mCnc
Synonyms
GH sp19 p chal SerPl-mCnc
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 affecting your adrenal glands, such as hyperaldosteronism (too much aldosterone) or hypoaldosteronism (too little aldosterone). It can also help diagnose conditions like primary aldosteronism, adrenal insufficiency, or certain kidney disorders.

What does the test involve?

A blood sample is taken from a vein in your arm. The sample is sent to a lab where it is analyzed to measure aldosterone levels. The test may be performed with or without the administration of a medication or substance to stimulate hormone release.

What might affect results?

Factors that could influence aldosterone levels include medications (such as steroids or diuretics), certain medical conditions (like kidney disease or heart failure), stress, and recent salt intake. It’s important to inform your doctor about all medications you’re taking and recent health events.

How is the test prepared?

No special preparation is typically required, but you may be asked to avoid certain medications or foods for a few days before the test. Your doctor will provide specific instructions if applicable.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Aldosterone level

Frequently asked questions

What are high or low aldosterone levels usually indicative of?
High aldosterone levels may suggest conditions like primary aldosteronism, which can cause high blood pressure, low potassium levels, and other health issues. Low aldosterone levels might indicate adrenal insufficiency or other disorders affecting hormone production.
How often is this test repeated?
The frequency of retesting depends on your symptoms and the reason for the initial test. Your doctor will determine if follow-up testing is needed and how often.
Can results change over time?
Yes, aldosterone levels can fluctuate based on your health status, medications, and lifestyle factors. Regular monitoring may be necessary if you have a condition linked to aldosterone imbalance.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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