Quick Reference
- Full form
- Aldosterone
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Next day
- Available at
- All locations
About Aldosterone
Aldosterone is a hormone that helps regulate your blood pressure and the balance of sodium and potassium in your body. Doctors typically order this test when investigating stubborn high blood pressure or unexplained potassium imbalances.
Because aldosterone levels change with posture and time of day, your doctor may give specific instructions before your blood draw. No fasting is generally required, and results are available the next day.
How to Prepare
- No fasting required.
- Your doctor may ask you to sit or lie down for a set time before the draw, follow their specific instructions.
Frequently Asked Questions
Why would my doctor order an aldosterone test?
It is usually ordered to investigate difficult-to-control high blood pressure or unexplained imbalances in sodium and potassium levels.
Do I need to fast before an aldosterone test?
Fasting is not usually required, though your doctor may give specific timing or posture instructions before the blood draw.
What does a high aldosterone level suggest?
It can suggest a condition affecting the adrenal glands, which may need further investigation and specialist follow-up.
Is this test affected by medication?
Yes, several blood pressure medications can affect aldosterone results, so tell your doctor about everything you are currently taking.
How soon will my aldosterone report be ready?
Typically the next day, given the specialised nature of this hormone test.
Is home sample collection available?
Yes, in all City Care Lab service areas.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.