Bromocresol Green Protein Urine Test (Mass Concentration)
This test measures the amount of protein in your urine using the bromocresol green dye method. Protein in urine can sometimes indicate kidney issues or other health conditions.
["Check for signs of kidney problems or protein loss in urine."]
Key facts at a glance
- LOINC
- 1929-9
- Short code
- UFLCH
- Synonyms
- BJ Protein Ur-mCnc
- Category
- chemistry
- Sample
- urine
- Container
- Sterile, screw-capped urine container; sterile 24-hour urine container if timed collection
- Units
- N/A
- Ref low
- 0
- Ref high
- 1.65
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Nephelometry
- CPT
- 83883
- SNOMED
- 313096001
- Specimen volume
- 10 mL random urine or complete 24-hour urine collection
- Stability
- Ambient: 2 hours; Refrigerated (2–8°C): 7 days; Frozen (-20°C): 30 days
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
Why This Test Is Done
Doctors may order this test to evaluate kidney function, detect kidney disease, or check for conditions like nephrotic syndrome, where the kidneys leak protein into urine. It can also help monitor proteinuria in patients with diabetes or other chronic illnesses.
What to Expect Before the Test
No special preparation is needed. You may be asked to collect a urine sample in the morning or at a specific time. Avoid strenuous exercise or certain medications that might affect protein levels before testing.
How the Test Is Performed
You’ll provide a urine sample, typically collected in a clean container. The sample is then tested using a chemical method (bromocresol green dye) to measure protein concentration. Results are often reported as a mass concentration in units like mg/dL or g/L.
Possible Results and Interpretation
Higher-than-normal protein levels in urine may signal kidney problems, inflammation, or other health concerns. Your doctor will interpret results in the context of your medical history and other tests.
Reference range
Free kappa light chains: <1.65 mg/L; Free lambda light chains: <3.15 mg/L; Kappa/Lambda ratio: 2.04–10.37N/A
No special preparation required. Patient should follow normal hydration unless instructed otherwise by physician.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
BCG Protein Urine
Frequently asked questions
What causes protein in urine normally?
How long does it take to get results?
Can diet affect protein levels in urine?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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