Specific IgE blood test
Measures allergy antibodies to specific foods, pollens, pets or other triggers - best used to confirm a suspected allergy.
TypeBlood test
HowStandard blood draw.
How oftenWhen you react to something specific.
BeforeAntihistamines don’t affect the result.
WhoPeople with reactions like hives, swelling, wheeze or sneezing after exposure.
Allergy, intolerance and “sensitivity” aren’t the same
A true allergy is an immune reaction (IgE) that can be serious. Intolerance causes discomfort but isn’t immune-driven. Many “sensitivity” tests measure something else entirely.
Allergy (IgE)
“Could it be dangerous?”
Fast reactions - hives, swelling, wheeze. Validated tests exist.
Established
Intolerance
“I just feel bloated.”
Discomfort without immune reaction - e.g. lactose. Tested differently.
Different tests
IgG “sensitivity”
“What about those panels?”
Mostly reflects foods you eat often - not a reliable diagnosis.
Limited evidence
Is it right for you?
Worth considering if…
- You react soon after eating a specific food.
- You have hay fever or pet-related symptoms.
- Skin testing isn’t possible (severe eczema or medications).
A better option if…
- You want to screen for “all” allergies - broad panels without symptoms cause false alarms.
- You suspect sensitivity - IgG panels aren’t reliable.
How it’s measured
Specific IgE
Blood test for chosen allergens.
Component testing
Shows which protein you react to - helps predict severity.
The full picture
What is it?
A blood test for allergy antibodies to specific triggers.
What type of test is it?
A blood biomarker.
What does it measure?
IgE levels against each tested allergen.
Why might someone consider it?
To confirm suspected allergies.
Who is it most relevant for?
People with reactions to specific triggers.
How is it performed?
A blood draw.
How often might it be considered?
When needed.
What can the result help you understand?
Whether you’re sensitised to a trigger.
What are its limitations?
A positive result doesn’t always mean a true allergy - history matters.
What should it be viewed with?
Symptoms, skin prick testing and supervised food challenge.
Where to get it
Through your provider
Usually ordered when symptoms or results point to it.
Lab services
e.g. Quest Diagnostics, Labcorp - typically with a provider order.
Specialists
Your provider may refer you to a specialist to interpret it.
Names are examples only, not endorsements. Your provider can often order the same test - and help interpret it.
Connected to
Questions to ask your provider
- Which allergens should be tested based on my reactions?
Ziva Health
One test is a snapshot. Ziva shows the whole story.
Ziva brings your lab results, wearables and daily readings together - and Isabella tells you what’s changing and what to ask your provider next.
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Being listed doesn’t mean everyone needs this test. Educational only — not medical advice. Results should be interpreted with a qualified clinician. ← Back to Know What to Test