Specific IgE (allergen-specific)
Specific IgE measures IgE antibodies against a SINGLE allergen (e.g. birch pollen, cat dander, peanut, milk). It is often ordered as a panel of several allergens at once.
| Rating | Range | What it means |
|---|---|---|
| Good | below 0.35 kU/L | Negative — no signs of sensitization to this allergen. |
| Worth improving | 0.35 – 0.7 kU/L | Low sensitization — not necessarily an allergy; the clinical picture decides. |
| Talk to a doctor | 0.7 kU/L and above | Elevated — sensitization to this allergen; clinical allergy ONLY with matching symptoms. |
Why it matters
A positive result means sensitization — not necessarily disease.
If it’s low
Low/negative sIgE means the absence of IgE sensitization to this allergen (but it rarely rules out all forms of reaction).
If it’s high
A higher value means stronger sensitization and a somewhat greater likelihood that it is clinically significant — but the history and symptoms decide, not just the number. With food, a supervised challenge test is often needed.
What to do
Do not interpret the results yourself — a positive IgE without symptoms usually does not mean an allergy and is not a reason to avoid the food. Discuss the meaning (and a possible challenge test) with an allergist; unnecessary diets can be harmful.
Read together with
IgE (total) · Eosinophils (abs.)
Articles about this marker
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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