Urine Protein
Also written as: Total urine protein, Proteinuria test, 24-hour urine protein
Measures protein leaking into urine, a sign of how well the kidney's filters are holding.
What it measures
The total amount of protein in the urine, checked with a strip test, a lab measurement on a single sample, or a timed collection. Unlike the albumin-specific test, it captures all proteins that may pass through or be produced along the urinary tract.
Why a doctor orders it
Ordered to check whether the kidney's filters are letting protein through, often to follow up a dipstick finding, unexplained swelling, or blood pressure concerns in pregnancy. It helps sort short-lived protein leaks from persistent ones.
What is generally associated with a higher result
Broadly associated with conditions affecting the kidney's filters and, in pregnancy, with blood pressure complications. Protein also appears temporarily with fever, vigorous exercise, dehydration, and long periods of standing, a pattern called orthostatic proteinuria that is common in adolescents.
What is generally associated with a lower result
Low values are the expected finding and are generally not pursued.
Everyday things that move this number
Not every shift in a value reflects disease. These are ordinary factors known to affect this particular measurement:
- Vigorous exercise before the sample
- Fever or recent illness
- Dehydration, which concentrates the urine
- Long periods of standing or activity earlier in the day
- Menstruation or contamination during collection
Questions to take to your appointment
- Is this measuring total protein or albumin specifically, and does that difference matter here?
- Would a first-morning sample help rule out posture-related protein?
- Is a ratio test or a timed collection a useful next step?
Build a printable questionnaire with your own results →
Where to read more
MedlinePlus, from the US National Library of Medicine, publishes patient-facing pages on individual lab tests and is a reliable next stop: medlineplus.gov/lab-tests .
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