Potassium test
Keeps your heartbeat steady and your muscles working.
€3.93. You pay at the desk, not online.
- Preparation: No fasting needed on its own
- Prescription: Not needed
- Results: In the Rosa app, within 10 working days
- Also called: Potassio, K, potassiemia, kaliemia
Potassium test: what it is for
Potassium is a mineral that sits almost entirely inside your cells. Only a little circulates in your blood, and your body holds it within very narrow limits, because it runs your heartbeat and your muscles. A surprise high result is often an effect of the blood draw itself.
Why it is done
Potassium keeps your nerves and muscles working, heart included. That is why your body holds it in a narrow window, and your kidneys clear the extra.
Both too much and too little can upset your heart rhythm. And because the range is narrow, even a value slightly out of range matters.
How the potassium test is done
It is a blood test, done at a Bianalisi lab without a prescription. You can add other tests to the same draw.
Questions about the potassium test.
Do I need to fast for a potassium test? Not for potassium. It is usually done with other tests that do need fasting, though, so it is best to arrive fasted. During the draw, keep your hand relaxed.
How much does the potassium test cost? €3.93, from Bianalisi’s private list for Lombardy. You pay at the desk on the day of the draw, not online.
Do I need a prescription for the potassium test? No. You book it here without a prescription and pay at the Bianalisi desk.
When do results arrive? Within 10 working days, in the Rosa app, with each value next to the lab’s interval. The report a doctor approves is in the Rosa membership.
