IgG (immunoglobulin G)
IgG is the main antibody in the blood and the carrier of long-term (memory) immunity. Serum IgG reflects the capacity of humoral defense.
| Rating | Range | What it means |
|---|---|---|
| Talk to a doctor | below 7 g/L | Low IgG — possible impaired humoral immunity; if you have symptoms, seek advice. |
| Good | 7 – 16 g/L | IgG within range. |
| Worth improving | 16 g/L and above | Elevated IgG — often chronic infection/inflammation; if it persists, seek advice. |
Why it matters
Low → possible immune deficiency; high → chronic infection/inflammation.
If it’s low
Reduced IgG (with symptoms) can indicate an immune deficiency — greater susceptibility to infections. A doctor/immunologist assesses it.
If it’s high
Elevated IgG often accompanies chronic infection/inflammation or an autoimmune disease; a marked rise can indicate a monoclonal gammopathy (consultation needed).
What to do
A single value is not a diagnosis — it is evaluated with symptoms (e.g. recurrent infections) and with IgA/IgM. With an abnormality, consult a doctor/immunologist.
Read together with
IgA (immunoglobulin A) · IgM (immunoglobulin M)
This content is for information only and is not a substitute for medical advice. Talk to your doctor about your results.
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