Basophils are the least common white blood cells. They release histamine during allergic reactions.
- Normal range (adults)
- Up to 1%
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Basophil, BASO, Basophil Count
Basophils normal range
| Group | %Same unit in all countries |
|---|---|
| Adults | Up to 1 |
Ranges vary slightly between laboratories. The range printed on your own report is the one to go by.
Why is the Basophils test done?
They are part of the WBC differential in a Complete Blood Count.
What does a high Basophils level mean?
High basophils are uncommon and are usually linked to allergy or inflammation.
Common causes
- Allergic reactions
- Chronic inflammation
- Underactive thyroid
- Rarely, bone-marrow disorders such as chronic myeloid leukemia
Diet and lifestyle tips
- Avoid known allergens
- Balanced anti-inflammatory diet
When should you see a doctor?
A clearly raised basophil count, especially with other abnormal blood counts, should be reviewed by a doctor.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.