Is my Neutrophils (%) normal?
Free blood test checker · Standard + longevity-optimal ranges
What is a normal Neutrophils level?
Neutrophils are the most abundant white blood cells and the first responders to bacterial infection. Normal percentage is 40-70% of total WBC. Elevated neutrophils (neutrophilia) typically indicate bacterial infection or inflammation. Low neutrophils (neutropenia) increase infection risk. The neutrophil-to-lymphocyte ratio (NLR) is an emerging systemic inflammation predictor.
| Range | Values |
|---|---|
| Standard Reference | 40–70 % |
| High Risk | > 80 % |
| Low Risk | < 30 % |
What causes abnormal Neutrophils levels?
Elevated neutrophils: bacterial infection (most common), acute inflammation, physical/emotional stress, corticosteroid use, smoking, myeloproliferative disorders (CML), and post-surgical response. Low neutrophils: chemotherapy, aplastic anemia, autoimmune neutropenia, viral infections, B12/folate deficiency, medications (methimazole, carbimazole, clozapine), and benign ethnic neutropenia.
When should you see a doctor?
See your doctor if absolute neutrophil count is below 1,500/µL (neutropenia) or if neutrophils are markedly elevated with signs of infection (fever, chills). ANC below 500/µL is a medical emergency requiring protective isolation and urgent evaluation. Persistent neutrophilia without clear cause warrants bone marrow evaluation.
Neutrophils and longevity
The neutrophil-to-lymphocyte ratio (NLR) is one of the most promising emerging biomarkers of systemic inflammation and biological aging. Elevated NLR reflects chronic low-grade inflammation (inflammaging) — the persistent, sterile inflammatory state that drives cardiovascular disease, neurodegeneration, and cancer in aging populations. An NLR below 2 is associated with better outcomes across multiple disease states. Tracking NLR alongside CRP provides a comprehensive picture of inflammatory burden.
Where to get a Neutrophils test
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Related biomarkers
These biomarkers are often tested alongside Neutrophils for a more complete picture.
Frequently asked questions
What is a normal neutrophil percentage?
What is the neutrophil-to-lymphocyte ratio (NLR)?
What causes neutropenia?
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Sources: Reference ranges based on AHA/ACC, ADA, and AACE clinical guidelines. Biological variation data from Ricos/Westgard database. Longevity-optimal ranges reflect targets used by preventive and functional medicine practitioners.
Last reviewed: April 2026. This tool provides general health information and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider about your specific results.