NLR
A simple ratio shown in research to reflect systemic inflammatory burden.
What is it
The neutrophil-to-lymphocyte ratio is calculated from the CBC differential. It has been studied as a marker of systemic inflammation across many disease states in published research.
Why it's measured
NLR has been associated with cardiovascular risk, cancer prognosis, and chronic inflammation in published research.
Reference range
Standard laboratory reference
< 2.5 ratio
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 systemic inflammation and adverse outcomes across many conditions in published research.
Lower
Generally considered favorable.
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
Calculated from 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.