Eosinophils
Immune system healthEosinophils combat parasites and participate in allergic responses.
Reference range
0.55.5
Low
Normal
High
%
Source: lab benchmark
Reference ranges may vary between labs and assays. Always interpret results with your healthcare provider.
Why this matters
Elevated levels, called eosinophilia, can signal the presence of allergies, asthma, eczema, or parasitic infections, and very high levels may indicate autoimmune conditions or certain blood disorders. Monitoring eosinophil levels can provide early insight into immune system activity and overall inflammatory status.
How this connects to other biomarkers
- Elevated Eosinophils suggests allergy/atopy, parasitic infection, drug reaction, or an eosinophilic disorder; persistent elevation > 1.5 × 10⁹/L warrants evaluation for hypereosinophilic syndrome (a rare condition with eosinophil infiltration of organs) and underlying malignancy.
- Low Eosinophils are usually clinically silent; transient suppression occurs with Cortisol elevation (acute stress, exogenous steroids, Cushing's syndrome).
Included in
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