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Serum or Plasma Total Protein by Bromocresol Purple Method

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

This test measures the total amount of protein in your blood, which includes albumin and globulins. Proteins are essential for maintaining fluid balance, supporting immunity, and transporting nutrients.

Quick summary

["Total protein helps assess overall health, kidney function, and potential protein-losing conditions."]

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

Key facts at a glance

LOINC
75020-8
Short code
t(9;22)(ABL1,BCR) Mar
Synonyms
t(9;22)(ABL1,BCR) Mar
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
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 healthcare provider may order this test to check for conditions like malnutrition, kidney disease, liver problems, or certain infections. It can also help monitor long-term health in people with chronic illnesses.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

Higher-than-normal results might suggest liver disease, dehydration, or overproduction of proteins. Lower-than-normal results could indicate malnutrition, kidney disease, or excessive protein loss.

Common Conditions Affecting Results

Conditions like cirrhosis, kidney failure, or severe infections can alter protein levels. Hormonal imbalances, certain medications, or recent illnesses may also impact results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Protein

Frequently asked questions

How often should I get this test?
Your provider will determine how often you need this test based on your health condition. It may be done once or multiple times a year depending on your treatment plan.
What does it feel like to have blood drawn?
Most people describe it as a quick, minor discomfort. A small needle is used to draw blood, and you may feel a slight pinch or sting. Most people recover quickly without complications.
Can I eat or drink before this test?
You can eat and drink normally before this test unless your provider instructs otherwise. Avoiding alcohol or heavy meals may not be necessary unless specified.
  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