White Blood Cell Count
White blood cells (leukocytes) are immune system cells that fight infections, destroy abnormal cells, and mediate allergic reactions.
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Conventional Range
4,500 - 11,000 cells/μL
Optimal Range
5,000 - 8,000 cells/μL
Why It Matters
WBC count reflects immune system activity and can indicate infection, inflammation, immune disorders, or blood cancers.
If Your Level Is High
Elevated WBC (leukocytosis) often indicates infection, inflammation, stress, medications, or rarely leukemia.
Possible Causes
- Infection
- Inflammation
- Stress
- Leukemia
- Medications
If Your Level Is Low
Low WBC (leukopenia) increases infection risk and may indicate bone marrow problems, autoimmune disease, or certain medications.
Possible Causes
- Viral infections
- Bone marrow disorders
- Autoimmune disease
- Chemotherapy
How to Optimize
Address underlying infections or conditions, ensure adequate nutrition, manage stress, avoid immunosuppressive exposures.
Dietary Factors
- Overall nutrition
- Vitamin deficiencies
- Protein intake
Lifestyle Factors
- Stress levels
- Exercise
- Sleep
- Infection exposure