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Proteinuria (Protein in Urine) – Quantitative

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of protein found in your urine, which can help detect kidney problems or other health conditions.

Quick summary

["Protein in urine may signal kidney issues or other health concerns that need further evaluation."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
50749-1
Short code
Prot Ur-Imp
Synonyms
Prot Ur-Imp
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like swelling in your legs, feet, or ankles, frequent urination, or blood in your urine. It can also be used to monitor kidney function, especially in people with diabetes, high blood pressure, or a family history of kidney disease.

What to Expect Before the Test

You may be asked to collect a small sample of urine in a clean container at home or bring a sample to a lab. Some people are advised to avoid certain foods or medications for a few days before the test, but this depends on your specific situation.

What the Results Mean

Higher-than-normal protein levels in urine can indicate kidney damage, inflammation, or other health issues. The exact meaning of your results depends on your overall health and medical history. Your doctor will interpret the results in the context of your symptoms and other tests.

Common Causes of Protein in Urine

Protein in urine can be caused by kidney problems, such as glomerulonephritis (inflammation of the kidney filters), diabetic nephropathy (kidney damage from diabetes), or other conditions like high blood pressure or infections.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein in urine test

Frequently asked questions

What does a high protein level in urine mean?
A high protein level in urine may mean your kidneys are not working as well as they should, which could be due to kidney disease, infections, or other health issues. Your doctor will discuss the results with you and may recommend further tests or treatments.
Can diet affect protein levels in urine?
Diet can sometimes influence urine protein levels, but the impact varies. Some foods, like high-protein diets, may temporarily increase protein excretion, but the primary focus is on identifying underlying health conditions rather than diet alone.
How often should I get this test?
Your doctor will determine how often you need this test based on your health status, symptoms, and risk factors. Regular monitoring may be recommended if you have kidney disease, diabetes, or high blood pressure.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy