Your Immune Protein Fraction
Globulins are the "other" blood proteins besides albumin. They include your immunoglobulins (antibodies: IgG, IgA, IgM, IgE), transport proteins, and complement. The globulin level is usually calculated (total protein minus albumin). High globulins suggest your immune system is revved up or a plasma cell disorder.
What is Globulin?
Globulins = total protein - albumin. Includes alpha-1 (AAT, HDL), alpha-2 (haptoglobin, ceruloplasmin), beta (transferrin, complement, LDL), and gamma (immunoglobulins) fractions. SPEP separates these fractions and identifies monoclonal spikes.
↑ What High Globulin Means
Immune system activation or abnormal protein production. Polyclonal: chronic infections (HIV, hepatitis, TB), autoimmune disease, chronic liver disease. Monoclonal: myeloma, lymphoma, MGUS.
Common symptoms:
If infection: fever, fatigue, organ-specific symptoms · If myeloma: bone pain, anemia, kidney failure, hypercalcemia · Often found incidentally
↓ What Low Globulin Means
Reduced immune protein production—immunodeficiency, nephrotic syndrome, or acute illness.
Common symptoms:
Recurrent infections
Why It Matters
When normal:
Elevated globulin triggers SPEP to rule out myeloma
Low globulin identifies immunodeficiency
A/G ratio inversion is a red flag
Complements albumin for complete protein picture
Risks if abnormal:
High: possible myeloma, chronic infection, autoimmune disease
Low: infection susceptibility
Monoclonal spike in gamma region: urgent hematology evaluation
What Can Cause Abnormal Levels?
Chronic Infection/Inflammation (high)
40% likelyPolyclonal immunoglobulin production from chronic antigenic stimulation.
Monoclonal Gammopathy (high)
20% likelyMGUS, myeloma, Waldenström macroglobulinemia produce a single abnormal protein.
Liver Disease (high)
Cirrhosis causes polyclonal hypergammaglobulinemia (reduced hepatic antigen clearance).
Autoimmune Disease
SLE, RA, Sjögren all elevate globulins.
Immunodeficiency (low)
CVID, agammaglobulinemia, or secondary from medications.
What You Can Do
If elevated: SPEP to distinguish polyclonal from monoclonal
Impact: Critical distinction—monoclonal needs hematology evaluation \u00B7 Timeline: Prompt
If lifestyle changes aren't enough:
If monoclonal spike: serum free light chains, 24h urine protein, bone survey
Impact: Myeloma workup \u00B7 Timeline: Urgent
Recommended retest: Per clinical context; SPEP if elevated
Got your blood test report?
Upload your PDF and understand ALL your markers in 2 minutes. Plain language. Traffic light status. No medical jargon.
Analyze My Report — FreeFirst report is free. No credit card needed.