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Globulin Test
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Lab Tests

Globulin Test

Globulin tests measure specific proteins in your blood to help evaluate liver function, kidney health, and immune system performance.

What is a Globulin Test?

Globulins are proteins produced by your liver and immune system that play critical roles in fighting infection, blood clotting, and organ function. There are three main types: alpha, beta, and gamma globulins. Common tests include:

  • Total protein test: Measures the total amount of protein in the blood, including globulins and albumin. Low levels may indicate liver or kidney disease.
  • Serum protein electrophoresis: Measures the levels of specific types of globulins to assess immune system function and diagnose conditions like multiple myeloma.

Why Do I Need a Globulin Test?

Providers may order these tests during routine checkups, to monitor existing liver or kidney conditions, or to investigate symptoms such as:

  • Nausea, vomiting, or lack of appetite
  • Fatigue or weakness
  • Jaundice (yellowing of skin and eyes)
  • Abdominal swelling or pain
  • Swelling in ankles and legs
  • Dark urine or light-colored stool
  • Frequent itching

Serum protein electrophoresis may also be used to diagnose autoimmune diseases like lupus or rheumatoid arthritis, allergies, or certain cancers.

What Happens During the Test

A health care professional collects a blood sample from a vein in your arm using a small needle. The procedure typically takes less than five minutes.

Understanding Results

  • Low globulin levels: May indicate liver disease, kidney disease, or malnutrition.
  • High globulin levels: May indicate infection, inflammatory disease, immune disorders, tuberculosis, or certain cancers such as multiple myeloma or lymphoma.

Abnormal results can also be caused by dehydration, pregnancy, or certain medications.

Frequently Asked Questions

No, fasting is generally not required for a globulin test. You can eat and drink normally before the appointment unless your healthcare provider has given you specific instructions related to other blood tests being performed at the same time.
Several medications can alter globulin levels. For example, anabolic steroids, oral contraceptives, and certain antibiotics may increase levels, while anticonvulsants and some steroids may decrease them. Always provide your doctor with a complete list of all prescription drugs, over-the-counter medications, and supplements you are taking before the test to help them interpret the results accurately.
Results for a standard total protein or globulin test are often available within 24 to 48 hours. However, if a more detailed serum protein electrophoresis is ordered to analyze specific protein fractions, it may take several days to a week for the laboratory to process the sample and send the results to your provider.
Elevated globulin levels often suggest that your immune system is actively responding to a chronic infection, inflammation, or autoimmune condition. In some cases, high levels can indicate the presence of abnormal proteins produced by plasma cells, which is a key marker in diagnosing conditions like multiple myeloma or lymphoma. Your doctor will typically order additional tests to pinpoint the exact cause.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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