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Plasma Aldosterone Concentration (Mass Concentration)

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

This test measures the amount of aldosterone, a hormone produced by your adrenal glands, in your blood plasma. It helps assess how well your body regulates blood pressure and fluid balance.

Quick summary

["Aldosterone helps control blood pressure and fluid retention; abnormal levels may signal conditions like adrenal disorders or kidney issues."]

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

Key facts at a glance

LOINC
57586-0
Short code
Aldost 1h p 25 mg Cpl PO SerPl-sCnc
Synonyms
Aldost 1h p 25 mg Cpl PO SerPl-sCnc
Category
coagulation
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 diagnose or monitor conditions such as primary aldosteroneism (Conn’s syndrome), adrenal insufficiency, or to evaluate symptoms like high blood pressure, low potassium, or unexplained fluid retention.

What Does the Test Involve?

You’ll have a blood sample drawn from a vein, usually in your arm. The sample is sent to a lab where it’s analyzed for aldosterone levels using a specialized immunoassay method.

What Are Common Results?

Results are typically reported as a mass concentration value (e.g., in picograms per milliliter). Your doctor will compare these results to your clinical picture and other tests to interpret them.

What Might Abnormal Results Mean?

High aldosterone levels may indicate conditions like primary hyperaldosteronism, which can cause high blood pressure and low potassium. Low levels might suggest adrenal gland problems or other hormonal imbalances.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High aldosterone levels can lead to elevated blood pressure, muscle weakness, or frequent urination due to excess potassium loss. Low levels may cause fatigue, low blood pressure, or salt cravings. Always discuss results with your healthcare provider.

Short name

Aldosterone Level

Frequently asked questions

How often should I expect this test?
The frequency depends on your health condition and treatment plan. Your doctor will determine how often you need retests based on your symptoms and lab results.
Does fasting affect this test?
No, fasting is generally not required for this test, but your doctor may provide specific instructions based on your situation.
What are the possible side effects of blood drawing?
Most people experience mild discomfort or bruising at the site where the blood was drawn. Rarely, there may be slight swelling or pain. If you experience excessive bleeding or fainting, inform your healthcare provider immediately.
  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