Basophils
The least common white blood cells — involved in allergic reactions.
What is it
Basophils are the least numerous white blood cells and participate in allergic and inflammatory responses.
Why it's measured
Basophil counts have been studied in research on allergic conditions and certain blood disorders.
Reference range
Standard laboratory reference
0 – 2% of WBC
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with allergic conditions and certain blood disorders in research literature.
Lower
Generally not clinically concerning.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Part of standard CBC with differential.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.