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Total immunoglobulin E (IgE)
The main antibody marker of the body’s allergic readiness. The total level suggests a direction; it does not name the allergen.
Other names: Total IgESection: AllergologySpecialist: Allergist-immunologistSample: Venous blood
Updated: September 17, 2026·MedProtect editorial team Reference information — not a diagnosis or a prescription
In shortNormal total IgE in adults is up to 100 IU/mL (lower in children, rising with age). It is elevated in atopy (allergic rhinitis, asthma, atopic dermatitis) and helminth infections. A normal IgE does not exclude allergy, and a high one does not name the allergen — for that, specific IgE tests are done.
What this marker is
Immunoglobulin E is the antibody class behind immediate allergic reactions and defense against parasites. Total IgE is the summed level of all such antibodies in blood.
The test answers “is there an allergic readiness (atopy)” but not “what is the allergy to”. To find the culprit, specific IgE to individual allergens or allergy panels are done. Another classic cause of high IgE is helminths.
Reference ranges
Group
Reference range
Adults
up to 100 IU/mL
Teenagers 12–16
roughly up to 60–200 IU/mL — per lab report
Children 6–12
roughly up to 90–200 IU/mL
Children under 6
roughly up to 35–60 IU/mL — rises with age
Newborns
usually < 2 IU/mL
Children’s ranges strongly depend on age — judge the result only against your laboratory’s reference. A normal IgE does not exclude allergy: up to a third of allergic people have an ordinary level. Ranges differ between laboratories.
Check your value
Enter the number from your lab report — see how it compares with the typical range. Mind the units shown in the chosen row.
An approximate comparison with a typical range, not a diagnosis. Ranges differ between laboratories — use the one on your report; a doctor interprets the result.
When it is high or appears: possible causes
AtopyAllergic rhinitis, asthma, atopic dermatitis — IgE rises during flares.
Helminth infectionsParasitic worms — a classic cause of high IgE, often with eosinophilia.
Food and household sensitizationMultiple allergen sensitivities sum into the total level.
Rare immune conditionsHyper-IgE syndrome, some immunodeficiencies — at very high values.
When it is low: possible causes
Low IgEUsually has no clinical meaning; extremely low values occur in rare immunodeficiencies.
What can skew the result
These factors can shift the result without any disease — keep them in mind before a retest:
Allergy flare seasonRecent allergen contactHelminthsAge (rises in children)
How to prepare
Venous blood; no special preparation. Antihistamines do not distort the result. Details: Preparation: venous blood.
When a retest makes sense
IgE itself is not tracked over time: it swings with season and contacts. It is repeated at the allergist’s decision, usually together with specific IgE.
Who usually reviews this result
An out-of-range result is usually reviewed by: Allergist-immunologist, primary care physician, pediatrician. Bring your report and any previous results to the visit.
Names used on lab reports
Look for one of these names on your report: Immunoglobulin ETotal IgETotal IgEIgE
Several markers on your report?
The app reads your whole report — this marker together with its neighbors, not one by one.
An elevated level typical of atopy (allergic rhinitis, asthma, dermatitis) or helminths. The number alone is neither a diagnosis nor a pointer to a specific trigger — next come specific IgE tests to allergens.
IgE normal but allergy exists — how?
Up to a third of allergic people have a normal total IgE. The diagnosis rests on complaints and specific IgE to particular allergens or skin prick tests.
Should a child get IgE “just in case”?
Without complaints — no. The test is indicated when allergy is suspected (sneezing, rash, seasonal cough) or helminths: it helps the doctor decide whether full allergy workup is needed.
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