Other allergen-specific IgE

Allergy · also printed as Specific IgE, Allergen specific IgE, Allergen-specific IgE, Specific IgE (other), RAST

Typical UK adult rangebelow 0.35 kUA/L

Below 0.35 kUA/L (class 0) is the usual result.

What this test measures

This covers IgE antibody against any allergen not listed separately, for example other foods, pollens, animals or medicines. Allergen-specific IgE is graded in classes: below 0.35 kUA/L is class 0 (not detected), then classes 1 to 6 with rising levels. A positive shows sensitisation, meaning the immune system has made antibody; it does not by itself mean the food or substance causes symptoms.

Why doctors request it

Requested when symptoms suggest an allergy to a particular substance.

What commonly pushes it up

Sensitisation to the named allergen
Cross-reaction with related allergens

What commonly pushes it down

A negative result is the usual finding

Everyday reasons for a value outside the range

A positive result without symptoms is common

About the sample

No fasting needed.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

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This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.