Basophils
Basophils are the rarest circulating granulocytes and release histamine and heparin during allergic and inflammatory reactions. Elevations can occur with chronic inflammation, hypothyroidism, or myeloproliferative disorders including chronic myeloid leukemia. Low counts are common during acute infection, stress, or pregnancy and rarely clinically meaningful alone.
20 of 22 providers
Complete Blood Count (CBC)
0-1% or 0-0.1 x10^9/L
What is Basophils?
Basophils are the rarest circulating granulocytes and release histamine and heparin during allergic and inflammatory reactions. Elevations can occur with chronic inflammation, hypothyroidism, or myeloproliferative disorders including chronic myeloid leukemia. Low counts are common during acute infection, stress, or pregnancy and rarely clinically meaningful alone.
Why It Matters
Release histamine during allergic reactions. Elevated in some blood cancers and allergic conditions. Rarely clinically significant alone.
Which Providers Test Basophils?
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 Basophils?
Basophils are the rarest circulating granulocytes and release histamine and heparin during allergic and inflammatory reactions. Elevations can occur with chronic inflammation, hypothyroidism, or myeloproliferative disorders including chronic myeloid leukemia. Low counts are common during acute infection, stress, or pregnancy and rarely clinically meaningful alone.
What is the optimal range for Basophils?
The standard reference range for Basophils is 0-1% or 0-0.1 x10^9/L. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Basophils?
20 out of 22 blood testing providers include Basophils in their panels. This biomarker is widely available across major providers.
What category does Basophils fall under?
Basophils 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