What Is Globulin in a Blood Test? Normal Range & What It Means
Also known as: Serum globulin, total globulin, globulin blood test
Globulins are a group of proteins made by your liver and immune system that help fight infection, transport nutrients, and support blood clotting. They're measured as part of the total protein on a metabolic panel. A normal globulin level is roughly 2.0–3.5 g/dL; high globulin can signal chronic inflammation or infection, while low globulin can reflect immune or liver issues.
Globulin normal range
| Category | Range (g/dL) |
|---|---|
| Normal | 2.0–3.5 g/dL |
| High | > 3.5 g/dLOften inflammation or infection |
| Low | < 2.0 g/dLImmune or liver-related |
Reference ranges vary by laboratory. Use the range printed on your own report as the definitive comparison.
What high Globulin can mean
- Chronic infection or inflammation
- Autoimmune conditions
- Liver disease
- Rarely, blood cancers such as multiple myeloma
What low Globulin can mean
- Immune deficiency
- Kidney disease (protein loss)
- Liver disease affecting protein production
What to do about an abnormal result
- Globulin is interpreted with albumin, total protein, and the A/G ratio.
- Persistently high globulin may prompt protein electrophoresis to identify the type.
- A single mildly abnormal value is often rechecked before further testing.
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Frequently asked questions
What does high globulin mean?
High globulin most often reflects chronic inflammation or infection, since the immune system produces more antibody proteins. It can also occur with autoimmune disease, liver disease, and, less commonly, blood cancers like multiple myeloma. It's evaluated with your A/G ratio and total protein.
Should I worry about slightly high globulin?
A mildly high globulin level is common and often not serious, especially during or after an infection. Your doctor considers it alongside your other protein values and symptoms before ordering additional tests.
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Medically reviewed by Antonieta Rueda, MD and Ayham Shneker, MD · Last reviewed July 6, 2026
This article is for informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or your lab results.