Neutrophils Percentage (Neutrophils %)
Haematology marker
Neutrophils Percentage
Neutrophils Percentage (Neutrophils %)
The proportion of white blood cells that are neutrophils, expressed as a percentage of the total. This is the relative differential value, distinct from the absolute neutrophil count. Because it is a proportion, it shifts whenever any other white-cell line rises or falls, so it is best interpreted alongside the absolute count.
PED Notes
A relative value, so read it together with the absolute neutrophil count and the rest of the differential. Intense training transiently raises the neutrophil percentage (a demargination/stress response), which normalises within a day; always use a rested draw. It is not directly altered by AAS, though the neutrophil-to-lymphocyte relationship is sometimes used as a rough systemic-inflammation gauge in athletes.
When high
When high (>75%):
- Usually reflects a relative shift from acute stress, recent intense exercise, bacterial infection, or corticosteroid effect; post-training elevation is transient
- Confirm with the absolute neutrophil count: a high percentage with a normal absolute count is often just a relative change (for example when lymphocytes are low)
- Persistent, unexplained elevation with a raised absolute count warrants an infection/inflammation screen (CRP)
When low
When low (<40%):
- Often a relative change driven by a high lymphocyte percentage (for example during a viral infection) rather than true neutropenia
- Check the absolute neutrophil count: a genuinely low absolute count (neutropenia) is what matters clinically. In athletes, overtraining, severe caloric restriction, and viral illness are common contributors
- Support with adequate sleep, caloric intake, and recovery; if the absolute count is low (<2.0 x10^9/L), follow the neutropenia guidance under the absolute Neutrophils marker and consult a physician if <1.0 x10^9/L
History Chart
Reading History
Frequently Asked Questions
Reference Ranges
Standard Range