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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 indicate conditions like hyperaldosteronism or adrenal insufficiency."]

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

Key facts at a glance

LOINC
13854-5
Short code
Aldost 2h p 25 mg Cpl PO SerPl-mCnc
Synonyms
Aldost 2h p 25 mg Cpl PO SerPl-mCnc
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 This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like high blood pressure, unexplained low potassium levels, or signs of fluid imbalance. It may also be used to diagnose or monitor conditions such as primary aldosteronism or adrenal disorders.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications (like some blood pressure drugs) or foods (like salt) for a short time before testing, depending on your doctor’s instructions.

How the Test Works

A blood sample is drawn from a vein in your arm. The plasma portion is analyzed to measure aldosterone levels using a sensitive laboratory method to detect even small amounts.

What the Results Mean

High aldosterone levels may suggest conditions like hyperaldosteronism, which can cause high blood pressure or low potassium. Low levels might indicate adrenal gland problems or other hormonal imbalances. Your doctor will interpret results in relation to your symptoms and overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Aldosterone Level

Frequently asked questions

How does aldosterone affect my health?
Aldosterone plays a key role in regulating blood pressure and fluid balance by controlling sodium and potassium levels in your body. Abnormal levels can lead to complications like heart strain, kidney issues, or electrolyte imbalances. Your doctor will use these results to guide treatment, such as managing blood pressure or adjusting medications.
What are the typical reference ranges?
Reference ranges vary by lab and may include different units (e.g., pg/mL or nmol/L). Your doctor will provide your specific results and compare them to your unique health needs.
Can I eat or drink anything before the test?
Follow your doctor’s instructions, as they may recommend avoiding salt-rich foods or certain medications for a few days before testing to get the most accurate results.
  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