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Labwise › Tests › Complete blood count (CBC)

Eosinophils %%

Eosinophils are white blood cells that rise with allergies and some parasitic infections. This is their share of all white cells.

See your own Eosinophils % on its range.

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What Eosinophils % measures

Eosinophils are white blood cells that rise with allergies and some parasitic infections. This is their share of all white cells.

If your Eosinophils % is low

A low share of eosinophils is typical and rarely notable.

Commonly associated with

Worth asking your clinician: Only alongside other CBC questions.

If your Eosinophils % is high

A higher share of eosinophils is commonly associated with allergies, asthma, eczema, some medications and parasitic infections.

Commonly associated with

Worth asking your clinician: Whether the absolute eosinophil count is elevated and whether allergy history explains it.

Typical reference range

GroupTypical range
Adults0 – 5 %

Typical adult values used by many US labs. Your own report prints the range your lab validated for its method, and that range is the one that counts. Labwise always uses the printed range first.

If it is within range

The share of eosinophils among your white cells is typical.

Also listed as

Eos, Eosinophils, Eos %

Related tests

This page is general information about what a laboratory test measures and what results outside a reference range are commonly associated with. It is not medical advice, does not diagnose any condition and does not replace your clinician. Discuss your results with your healthcare provider.