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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 produced by your adrenal glands, in your blood. It helps assess how well your body regulates salt and fluid balance.

Quick summary

["Aldosterone helps control blood pressure and electrolyte balance; abnormal levels may signal conditions like adrenal insufficiency or hyperaldosteronism."]

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

Key facts at a glance

LOINC
50720-2
Short code
11DC sp3 p chal SerPl-mCnc
Synonyms
11DC sp3 p chal SerPl-mCnc
Category
hormone
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 if you have symptoms like high blood pressure, unusual thirst, fatigue, or signs of fluid imbalance. It’s also used to diagnose or monitor conditions such as primary aldosteronism (Conn’s syndrome) or adrenal gland disorders.

What to Expect Before the Test

No special preparation is needed unless instructed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on medications like potassium-sparing diuretics, your doctor may advise timing around your dose.

What the Results Mean

Results are compared to standard reference ranges for your age, sex, and health status. High aldosterone levels may indicate overproduction by your adrenal glands, while low levels could suggest adrenal gland problems or other conditions.

Common Conditions Linked to Aldosterone Levels

High aldosterone is often linked to conditions like primary hyperaldosteronism, which can cause high blood pressure and low potassium levels. Low aldosterone may signal adrenal insufficiency or other hormonal imbalances.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Aldosterone Level

Frequently asked questions

What triggers a high aldosterone test result?
Several factors can influence aldosterone levels, including certain medications (like steroids or diuretics), kidney disease, pregnancy, or conditions like Cushing’s syndrome. Stress, obesity, or high salt intake may also play a role.
How long does it take to get aldosterone test results?
Results are typically available within 1–3 business days, depending on your lab and insurance. Follow-up with your doctor is needed to discuss findings and next steps.
Can I eat or drink anything before this test?
Standard fasting is not required unless specified by your doctor. However, avoid alcohol or caffeine for 24 hours before testing, as they can temporarily affect hormone levels.
  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