Eosinophils (%)

Shows what share of your white blood cells are eosinophils, which can reflect allergies or inflammation.

Last reviewedJune 16, 2026
Whole blood
sample type
~3 mL
blood needed
~7 days
results in app
Morning, 7 to 11am
best timing
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In short

This is the share of your white blood cells that are eosinophils, given as a percentage. Eosinophils respond to allergies and parasite infections.

The percentage comes from the differential part of a complete blood count and is best read next to the absolute eosinophil count.

Blood Health (CBC & Iron)
Reviewed against DGKL reference practice.
Why it matters

Why test this?

A raised eosinophil percentage often goes with allergies, asthma, eczema, a drug reaction, or a parasite. Because a percentage shifts whenever another cell type changes, it is interpreted together with the absolute count rather than on its own.

Reference ranges

What is a normal result?

Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.

Typical adult range, automated differential:

MeasureTypical range
Eosinophils, percent of WBC1 to 6 %

Ranges are guidance only and vary by laboratory and analyser. Read against your lab's own reference range, aligned to German practice (DGKL).

Ranges are guidance and vary by lab and assay, aligned with DGKL practice. Always read your result against your own lab's reference interval.
What you'll learn

What insights will this test give you?

You learn what proportion of your white cells are eosinophils. With the absolute count and the rest of the differential, it helps point toward an allergic tendency or a parasite.

What affects your level

What can affect this result?

What can skew the result

The percentage moves when any other white cell type rises or falls. Levels vary through the day and drop with corticosteroids. Allergy flares raise them. Delays before analysis can affect the result.

Best interpreted with

Best read with the absolute eosinophil count and the other differential percentages, since they all add up to 100 percent of the white cells.

How testing works

How is this tested?

Sample
Whole blood
Blood needed
~3 mL
Method
Flow cytometry
Best timing
Morning, 7 to 11am
FAQ

Common questions

What does a high eosinophil percentage mean? It often relates to allergies, asthma, certain infections like parasites, or medicine reactions. Your clinician may check the absolute eosinophil count for context.

What can affect my result? Steroids, recent illness or stress, time of day, hard exercise, smoking, and dehydration can shift values. Allergy flares and some medicines can raise eosinophils.

Do I need to fast? No. Fasting is not required. For trends, try to test at the same time of day.

How often should I test this? Usually with a routine CBC or when symptoms are being evaluated or monitored. Your clinician will guide timing.

How long do results take? Results are usually ready in about 7 days.

What should I discuss with my clinician? Share symptoms, allergy history, recent travel, and all medicines, especially steroids. Ask whether to check the absolute eosinophil count or related tests.

Related biomarkers

Markers usually read alongside this one

On this page
Why testReference rangesWhat you'll learnWhat affects itHow testing worksSourcesFAQ
✦ Privately insured? German PKV usually reimburses.

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