Complete Blood Count (CBC)Reported in %Eosinophils (percent)
The percentage of white cells that are eosinophils. Read it with the absolute eosinophil count.
What it measures
This is the eosinophil share of the differential. Because eosinophils are a small population, a one-point swing in the percent can look dramatic and still correspond to a modest change in the absolute count.
Why it is on the panel
It completes the white cell mix. Patterns across neutrophils, lymphocytes, and eosinophils tell a clearer story than any single percent.
How to read it
If the percent is high, check the absolute count before deciding the eosinophils truly increased. Allergies move both, but the absolute count is the one to quote.
When it runs higher
The same settings that raise the absolute count raise the percent: allergy, asthma, parasites, and some drug reactions.
When it runs lower
A percent at the bottom of the interval is usually unremarkable, especially if the absolute count is typical.
How to use this page
This page explains what the measurement is for. It is educational. Your Healiam report includes the reference interval for your age and sex, and a clinician reads that result with your history, medicines, and the rest of the panel. Talk with a clinician before changing diet, supplements, or treatment because of a number on a report.
Eos
Eos is part of the full panel.
No referral or insurance required.
One preventive draw covers this measurement and the rest of the Healiam panel. CLIA-certified results come back in days.