Protein in Urine Test
This test measures the amount of protein in your urine. Normally, very little protein is present. High levels may indicate kidney damage or disease.
What this test measures
A protein in urine test measures how much protein is in your urine. Normally, you have very little protein in your urine. A large amount may mean you have a kidney problem.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
A large amount of protein in your urine may mean you have a kidney problem. However, temporary high levels can also be caused by strenuous exercise, dehydration, diet, stress, or pregnancy. If protein remains high over time, it likely indicates kidney disease or damage.
Frequently asked questions
What does a protein in urine test measure?
It measures how much protein is in your urine. Normally, very little protein is present.
Why is protein normally kept in the blood?
Your kidneys have tiny filters that prevent large protein molecules from leaving your body through urine.
What can cause a temporary high protein level in urine?
Strenuous exercise, dehydration, your diet, stress, and pregnancy can cause temporary high levels.
What does a persistently high protein level mean?
It is likely a sign of kidney disease or kidney damage from other conditions.
Do I need more tests if my protein level is high?
Yes, your provider may recommend other tests to see if the high level continues and to diagnose the cause.
Related lab tests
Sources
- MedlinePlus: Protein in Urine — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.