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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 that helps regulate blood pressure and fluid balance.

Quick summary

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

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

Key facts at a glance

LOINC
57579-5
Short code
Aldost p 25 mg Cpl PO SerPl-mCnc
Synonyms
Aldost 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 like primary aldosteronism (a rare disorder causing high blood pressure), adrenal insufficiency, or to check for hormonal imbalances affecting your kidneys or blood pressure.

What Does the Test Involve?

You’ll have a blood sample drawn from a vein in your arm. The blood is processed to separate plasma, where aldosterone levels are measured using a sensitive immunoassay technique.

What to Expect Before the Test

No special preparation is needed, but you may be asked to avoid certain medications or foods that could affect hormone levels for a short time before testing.

What Are Common Results?

Results are reported as a mass concentration in plasma, but exact reference ranges vary by lab. High levels may indicate overactive adrenal glands, while low levels could signal adrenal gland or pituitary issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: High aldosterone levels often lead to high blood pressure, kidney problems, or low potassium levels. Low levels may suggest adrenal insufficiency or other endocrine disorders requiring further evaluation.

Short name

Aldosterone Level

Frequently asked questions

Why might my doctor want to check aldosterone levels?
Your doctor may recommend this test if you have unexplained high blood pressure, frequent headaches, or symptoms like fatigue, muscle weakness, or frequent urination.
How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on lab processing times.
Can I eat or drink anything before this test?
No special diet is required, but avoid alcohol or certain medications that could affect hormone levels for a few days before testing.
  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