IgG blood test in Chiswick
An IgG blood test measures immunoglobulin G, the most common antibody in the blood and the main source of long-term protection after infection or vaccination. It is booked to look at overall antibody levels and immune health.
What the test measures
Immunoglobulin G (IgG) makes up the largest share of antibodies circulating in the blood. It is produced as the immune system learns to recognise a particular germ, and it provides lasting protection after infection or vaccination. IgG is also the only antibody that crosses the placenta, giving newborn babies protection in their first months.
This test measures total IgG, not antibodies to any one infection, and it is not an IgG food intolerance test. It shows whether your overall IgG production is within the usual range, which is useful when looking at recurrent infections or conditions that affect the immune system.
The price includes the blood sample taken at our Chiswick clinic, analysis at the Randox accredited laboratory, a practitioner review of your result with you, and a GP feedback report on request.
Who it is for
- You have repeated or slow-to-clear infections and want to check your antibody levels.
- You take medicines that can lower antibody production and want monitoring.
- You have a long-term inflammatory, liver or autoimmune condition.
- A previous test showed raised total protein or globulin.
- You want a baseline of immune proteins as part of an in-depth health review.
Understanding your result
Your report shows your IgG level against the laboratory reference range. A low IgG can mean the body is not producing enough antibodies, which may be inherited or caused by medicines such as steroids or immune-suppressing treatments, by some blood conditions or by losing protein through the kidneys or gut. Low levels may increase the chance of infections.
A raised IgG is commonly seen with chronic infections, liver disease and autoimmune conditions. Less often, it can reflect a condition where one antibody type is produced in excess, which a specialist may investigate with further tests. A value outside the range is a prompt for discussion, not a diagnosis.
Preparing for your test
No fasting is needed for an IgG test. Tell us about any recent infections, vaccinations, immunoglobulin treatment and medicines that affect the immune system. Keep taking prescribed medicines unless your doctor advises otherwise, and we will confirm any other preparation when you book.
IgG is included with IgA and IgM in Advanced GP3 and in Omnia Signature, which covers immune proteins among many other markers. You can also see every blood test and price in Chiswick.
Questions
How much is an IgG test in Chiswick?
An immunoglobulin G (IgG) blood test at Omnia Lifestyle costs £49. The price covers your sample in Chiswick, analysis at an accredited laboratory, a practitioner review and a GP feedback report on request.
Is this an IgG food intolerance test?
No. This test measures your total IgG antibody level as a marker of immune function. IgG food intolerance tests are different and are not recommended by NHS allergy specialists.
Will this show if I am immune to a specific infection?
No. Total IgG does not show protection against any particular germ. Specific antibody tests are needed for that.
What does a low IgG mean?
It can suggest reduced antibody production, which may be related to medicines, protein loss or an immune condition. Your practitioner will discuss whether further assessment with your GP is advisable.
