Potassium, 24 hr Urine
This test measures how much potassium your body excretes over 24 hours, revealing your kidney function and electrolyte balance. It helps identify whether you're retaining or losing too much potassium, which can affect muscle function, heart rhythm, and blood pressure.
Athletes lose potassium through sweat during intense training and endurance events, making 24-hour urine potassium useful for assessing renal handling during high training loads. This is particularly relevant for endurance athletes, those training in hot conditions, or anyone on diuretics or strict dietary protocols, as abnormal levels can impair muscle contractility and recovery.
Turnaround Time
1 day
Method
Ion-selective electrode (ISE); flame photometer
Order online
Choose your lab and check out. We send your lab requisition automatically — no doctor visit needed.
Get your sample collected
Visit a lab service center near you for a quick blood draw (or book at-home phlebotomy where available).
See your results
Your results land in your Insider portal, ready to review and act on — that easy.
Your price
$5.00$30
6.0× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$5.00
Peer-reviewed sources supporting the educational content on this page.
Potassium, 24 hr Urine
This test measures how much potassium your body excretes over 24 hours, revealing your kidney function and electrolyte balance. It helps identify whether you're retaining or losing too much potassium, which can affect muscle function, heart rhythm, and blood pressure.
The Potassium, 24 hr Urine test starts at $5.00 at Labcorp. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $3.50.
Results for the Potassium, 24 hr Urine test are typically ready about 1 day after your draw. Your results land in your Insider portal.
No. When you order the Potassium, 24 hr Urine test from Fitomics Research Labs, a licensed physician in our 50-state network reviews and signs your requisition after checkout, and it lands in your portal and inbox. Then visit any Labcorp, Quest, or BioReference patient service center for your draw; results post to your Insider portal.
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