Hormones
Aldosterone
CONVERT & COMPARE
ng/dL
=
499
pmol/L
Reference ranges by source
Published adult intervals: 4, from 4 named sources, shown in ng/dL.
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SEX
AGE
RANGE
VISUAL
CITE
Ages 0–17 (CALIPER)
3 age- and sex-stratified entries from the Canadian Laboratory Initiative on Pediatric Reference Intervals.
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SEX
AGE
RANGE
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CITE
About Aldosterone
An aldosterone test measures the amount of aldosterone (ALD) in your blood or urine (pee). ALD is a hormone made by your adrenal glands, two small glands that sit above your kidneys. ALD helps keep your blood pressure stable. It does this by helping to balance the levels of two electrolytes in your blood, sodium and potassium.
If your blood pressure gets too low, ALD signals your kidneys to release more sodium into your blood and to get rid of potassium through urine. This helps keep more water in your bloodstream, which makes your blood pressure increase. When your blood pressure returns to normal, your ALD levels decrease.
ALD testing may be used with other tests to help diagnose adrenal gland disorders. It can also help find out if other medical conditions are affecting the way your adrenal glands work.
Because aldosterone in the blood can shift based on how much salt you've eaten and even your body position when blood is drawn, your provider may sometimes use a 24-hour urine test instead of a blood test to get a steadier picture.
Main source: MedlinePlus ↗
Useful for
An aldosterone (ALD) test is mainly used with a renin test to find out whether too much ALD is the cause of high blood pressure, especially when high blood pressure happens with low potassium levels, doesn't improve with usual blood pressure medicines, or develops at a young age.
Help diagnose adrenal gland disorders, including primary hyperaldosteronism, a condition that can be a hidden cause of high blood pressure.
Find the cause of an abnormal sodium or potassium level on an electrolyte test.
Find the cause of orthostatic hypotension (low blood pressure that makes you dizzy when you get up from sitting or lying down).
Main source: MedlinePlus ↗
Interpretation
To understand what your test results mean, your provider will consider your aldosterone (ALD) levels along with the results of other tests. Ask your provider to explain what your results say about your health.
In general, higher than normal amounts of ALD or lower than normal amounts of ALD may indicate an adrenal gland disorder or other condition affecting how your adrenal glands work.
A small share of people with high blood pressure have primary hyperaldosteronism, where the adrenal glands make too much aldosterone. This often shows up alongside low potassium and a low renin level.
For general wellness information only. Talk to a clinician about your specific results.
Main source: MedlinePlus ↗
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Related biomarkers
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Sources
Last updated 2026-05-02
This page presents source-specific reference data and sourced explanations. For general wellness information only. This is not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.