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Bromocresol Green Protein (BCG) Measurement in Serum

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

This test measures the protein content in your blood using bromocresol green dye, which helps assess overall protein levels and liver function.

Quick summary

["This test helps monitor protein balance and liver health."]

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

Key facts at a glance

LOINC
44121-2
Short code
Deprecated MG Brst PC Bx needle guide
Synonyms
Deprecated MG Brst PC Bx needle guide
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mg
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

Bromocresol green dye binds to proteins in your serum, allowing the test to detect the concentration of certain proteins. This method is often used to evaluate protein synthesis, liver function, and potential protein loss in conditions like kidney disease or malnutrition.

Why It Matters in Healthcare

Protein levels can indicate how well your body is producing and maintaining proteins, which are vital for muscle repair, immune function, and nutrient transport. Abnormal results may signal liver issues, kidney problems, or other metabolic conditions.

Common Uses and Indications

Doctors may order this test when evaluating liver function, monitoring protein deficiencies, or assessing conditions like hypoalbuminemia (low albumin) or chronic liver disease.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in the arm. The serum portion (liquid after clotting) is used for testing. This test is usually done in a lab using a colorimetric method to measure protein concentration.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

BCG Protein Test

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will discuss the meaning of your specific results with you.
Can I eat or drink anything before this test?
No special preparation is needed for this test. However, inform your healthcare provider about any medications or supplements you’re taking, as they may affect results.
What does a low or high protein result mean?
Low protein levels may indicate liver disease, kidney problems, malnutrition, or excessive protein loss (e.g., from wounds or diarrhea). High levels could suggest dehydration or certain liver conditions. Your doctor will interpret results in the context of your overall health.
  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