Neutrophils
Haematology marker
Neutrophils
Category: Haematology
Unit: x10^9/L
Most abundant white blood cell type. First responders to bacterial infection.
PED Notes
Can be transiently elevated after intense training. Chronic elevation may indicate infection or inflammation. Not typically directly affected by AAS.
When low (neutropenia, <2.0 x10^9/L):
Supplements:
- Zinc -- 30mg/day (supports immune cell production)
- Vitamin C -- 1-2g/day (supports neutrophil function)
- Probiotics -- 10-20 billion CFU/day
Lifestyle:
- Rule out overtraining -- reduce training volume/intensity temporarily
- Ensure adequate sleep (7-9h) and caloric intake
- If <1.0 x10^9/L, consult a physician -- increased infection risk
When high (neutrophilia, >7.5 x10^9/L):
- Usually reactive: bacterial infection, acute inflammation, physical stress, corticosteroid use
- Post-training elevation is transient and normalises within 24h
- Persistent elevation without obvious cause warrants investigation (infection screen, CRP)
References:
- Prasad, A. S., Mantzoros, C. S., Beck, F. W. J., Hess, J. W., & Brewer, G. J. (1996). Zinc status and serum testosterone levels of healthy adults. Nutrition, 12(5), 344-348. DOI: 10.1016/S0899-9007(96)80058-X
History Chart
Reading History
Frequently Asked Questions
Reference Ranges
Standard Range
2 - 7.5 x10^9/L