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Serum or Plasma Total Protein by Bromocresol Green (BCG) Method

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

This test measures the total amount of protein in your blood, which includes albumin and other proteins like globulins.

Quick summary

["Total protein helps assess overall protein balance and potential liver or kidney issues."]

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

Key facts at a glance

LOINC
37850-5
Short code
XR tomo Should
Synonyms
XR tomo Should
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr-tomography
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

Why Is This Test Done?

Your doctor may order this test to check for conditions affecting protein production, such as liver disease, kidney problems, malnutrition, or certain immune disorders. It can also help monitor treatment responses or identify fluid imbalances.

What Does a Low or High Result Mean?

Low protein levels might suggest malnutrition, liver disease, or kidney problems, while high levels could indicate dehydration, multiple myeloma, or severe infections.

How Is This Test Performed?

A blood sample is taken from a vein, usually in your arm. The sample is sent to a lab where it is analyzed using a bromocresol green dye to measure protein concentration.

What Are Common Conditions Monitored?

This test is often used to monitor conditions like cirrhosis (liver disease), nephrotic syndrome (kidney disease), or to evaluate protein-losing gastrointestinal disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Protein

Frequently asked questions

What does a normal range mean for this test?
A normal range isn’t provided here because reference intervals vary by lab and demographic. Your results will be compared to your specific lab’s standards.
How often should I get this test?
Your doctor will determine how often you need this test based on your health condition, symptoms, and treatment plan. Follow-up tests may be scheduled if your results are outside expected ranges.
Can diet affect my protein test results?
Yes, diet can influence protein levels. High-protein diets or conditions like malnutrition may alter results. Always discuss your diet with your healthcare provider if you have concerns.
  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