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Total Serum Protein by Bromocresol Green (BCG) Method

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

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

Quick summary

["Your blood protein levels help doctors assess overall health, kidney function, and nutritional status."]

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

Key facts at a glance

LOINC
7845-1
Short code
T sol lar IgA Ser Ql
Synonyms
T sol lar IgA Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 This Test Is Done

Doctors may order this test to check for conditions affecting protein production, such as liver disease, kidney problems, or malnutrition. It can also help monitor treatments for conditions like chronic kidney disease or certain cancers.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into a vein in your arm to draw blood. This usually takes a few minutes.

What the Results Mean

Lower than expected protein levels might suggest malnutrition, liver disease, or kidney issues. Higher levels could indicate dehydration or certain inflammatory conditions. Your doctor will interpret results in the context of your overall health.

Common Conditions Monitored

This test is often used to monitor conditions like chronic kidney disease, liver disease, and certain types of cancer, where protein levels can change over time.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Serum Protein

Frequently asked questions

What causes low protein levels in blood?
Low protein levels can result from conditions like liver disease (where proteins aren’t made properly), kidney disease (where proteins are lost in urine), severe infections, or malnutrition. It may also be due to certain medications or rapid weight loss.
What are normal protein levels in blood?
Normal protein levels vary by lab and individual, but typically range between about 6.4 to 8.3 grams per deciliter (g/dL). Your doctor will compare your results to your specific reference range.
Can diet affect protein test results?
Yes, diet can influence protein levels. Eating a balanced diet with adequate protein intake helps maintain normal levels. Extreme dietary changes, such as very low-protein diets, may temporarily affect results.
  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