Eosinophils
Eosinophils are white blood cells that release granules containing enzymes to target parasites and regulate allergic and asthmatic inflammation. Elevated counts are typical in allergies, asthma, eczema, drug reactions, parasitic infections, and some cancers and autoimmune conditions. Very high counts warrant evaluation for hypereosinophilic syndromes.
20 of 22 providers
Complete Blood Count (CBC)
1-4% or 0.04-0.4 x10^9/L
What is Eosinophils?
Eosinophils are white blood cells that release granules containing enzymes to target parasites and regulate allergic and asthmatic inflammation. Elevated counts are typical in allergies, asthma, eczema, drug reactions, parasitic infections, and some cancers and autoimmune conditions. Very high counts warrant evaluation for hypereosinophilic syndromes.
Why It Matters
Elevated in allergies, asthma, parasitic infections, and some cancers. Important for diagnosing allergic conditions and monitoring treatment response.
Which Providers Test Eosinophils?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | ✓ | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | ✓ | $349 | 65 |
 Labcorp OnDemand | ✓ | $398 | 40+ |
| ✓ | $486 | 40+ | |
| ✓ | $449 | 288 | |
| ✓ | $349 | 100+ | |
| ✓ | $829 | 54 | |
 Function Health | ✓ | $365 | 160+ |
| ✓ | $250 | 65 | |
| ✓ | $495 | 80+ | |
| ✓ | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| ✓ | $375 | 95+ | |
| — | $Varies | 75+ | |
| ✓ | $190 | 100+ | |
| ✓ | $99 | 50 | |
| — | $124 | 60 | |
| ✓ | $349 | 130+ | |
| ✓ | $349 | 80+ | |
| ✓ | $375 | 85 | |
| ✓ | $700 | 128 | |
| ✓ | $99 | 100+ |
Frequently Asked Questions
What is Eosinophils?
Eosinophils are white blood cells that release granules containing enzymes to target parasites and regulate allergic and asthmatic inflammation. Elevated counts are typical in allergies, asthma, eczema, drug reactions, parasitic infections, and some cancers and autoimmune conditions. Very high counts warrant evaluation for hypereosinophilic syndromes.
What is the optimal range for Eosinophils?
The standard reference range for Eosinophils is 1-4% or 0.04-0.4 x10^9/L. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Eosinophils?
20 out of 22 blood testing providers include Eosinophils in their panels. This biomarker is widely available across major providers.
What category does Eosinophils fall under?
Eosinophils is categorized under Complete Blood Count (CBC). This category includes biomarkers that help assess related aspects of health and wellness.
Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12