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Plasma Aldosterone Concentration (Mass)

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.

Quick summary

["Aldosterone helps regulate blood pressure and fluid balance; abnormal levels may indicate conditions like hypertension or adrenal disorders."]

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

Key facts at a glance

LOINC
13853-7
Short code
Aldost 1h p 25 mg Cpl PO SerPl-mCnc
Synonyms
Aldost 1h 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 Is This Test Done?

Your doctor may order this test to diagnose or monitor conditions affecting your blood pressure, kidney function, or hormone levels. It can help identify whether you have conditions like primary aldosteronism (an adrenal gland disorder) or other hormonal imbalances.

What Does the Test Involve?

You’ll have a small needle inserted into your arm to draw blood. The blood sample is then sent to a lab for analysis using a specialized technique to measure aldosterone levels precisely.

What Do Results Mean?

Results are compared to general reference ranges for aldosterone in plasma. High levels may suggest conditions like aldosterone excess, while low levels could indicate adrenal insufficiency or other hormonal issues. Your doctor will interpret results in the context of your overall health and symptoms.

Common Conditions Monitored

This test is often used to evaluate or monitor conditions such as hypertension (high blood pressure), kidney disease, or hormonal imbalances like Cushing’s syndrome or Addison’s disease.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Aldosterone plays a key role in regulating sodium and potassium balance, blood volume, and blood pressure. Elevated aldosterone can lead to high blood pressure, kidney problems, or weakened bones, while low levels may cause fatigue, low blood pressure, or electrolyte imbalances. Your doctor may use these results to guide treatment for conditions like hypertension, adrenal disorders, or other metabolic issues.

Short name

Aldosterone (plasma)

Frequently asked questions

What causes abnormal aldosterone levels?
Abnormal aldosterone levels can result from conditions like primary aldosteronism (an adrenal tumor or overactive adrenal glands), kidney disease, certain medications (e.g., steroids), or other hormonal imbalances. Lifestyle factors like diet (e.g., high salt intake) or chronic stress may also influence results.
How is this test different from other hormone tests?
Unlike some hormone tests that measure cortisol or thyroid hormones, aldosterone is specifically measured in plasma to assess its role in blood pressure regulation. This test focuses solely on aldosterone concentration, not other related hormones.
Can I eat or drink anything before this test?
For this test, you may need to follow specific instructions, such as fasting or avoiding certain medications. Always check with your doctor or lab technician for any dietary or preparation guidelines before your appointment.
  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