What It Measures
This test measures the total number of white blood cells (leukocytes) per microliter of blood. White blood cells include neutrophils, lymphocytes, monocytes, eosinophils, and basophils — each playing distinct roles in immune defense. The count reflects overall immune system activity and bone marrow function.
White blood cell (WBC) count measures the total number of leukocytes circulating in the blood. WBCs are the cornerstone of the immune system, defending against infections, foreign invaders, and abnormal cells. An abnormal WBC count can signal infection, inflammation, immune disorders, or bone marrow dysfunction.
Current Value
What High Means
Elevated WBC (leukocytosis, >11.0 x10³/µL) can indicate acute bacterial or viral infections, chronic inflammation, allergic reactions, stress response (physical or emotional), smoking, corticosteroid use, leukemia or other myeloproliferative disorders, tissue damage (burns, surgery, trauma), and autoimmune conditions. Even mildly elevated WBC in the 6.0–10.0 range has been associated with increased cardiovascular risk and all-cause mortality in epidemiological studies.
Possible Symptoms
Often asymptomatic when mildly elevated. With significant leukocytosis: fever, fatigue, malaise, night sweats, unexplained weight loss, easy bruising or bleeding (if due to leukemia), bone pain, swollen lymph nodes, recurrent infections paradoxically if WBCs are dysfunctional.
What Low Means
Low WBC (leukopenia, <4.0 x10³/µL) can indicate bone marrow suppression (from chemotherapy, radiation, or toxins), viral infections (HIV, hepatitis), autoimmune conditions (lupus), severe bacterial infections (sepsis consuming WBCs), nutritional deficiencies (B12, folate, copper, zinc), aplastic anemia, or congenital bone marrow disorders. Low WBC increases susceptibility to infections.
Possible Symptoms
Frequent or recurrent infections, slow wound healing, fever, mouth sores, sore throat, fatigue, malaise, skin infections, pneumonia susceptibility, swollen glands.
Risk Factors
Cardiovascular disease (elevated WBC is an independent risk factor), chronic infections, autoimmune disorders (rheumatoid arthritis, lupus), leukemia and lymphoma, chronic inflammation, metabolic syndrome, obesity, smoking-related disease, bone marrow failure syndromes, immunodeficiency disorders.
Actionable Advice
Supplements
- •Vitamin C
- •Vitamin D3
- •Zinc
- •Vitamin B12
- •Folate
- •Astragalus
- •Echinacea
- •Medicinal mushrooms (reishi, turkey tail)
- •Selenium
- •Copper
Diet & Lifestyle
- •Exercise regularly at moderate intensity (150+ min/week) — excessive intense exercise can transiently suppress WBC
- •Prioritize 7-9 hours of quality sleep; sleep deprivation impairs immune function
- •Manage chronic stress through meditation, breathwork, or therapy — cortisol dysregulation affects WBC
- •Stop smoking — smoking chronically elevates WBC and drives inflammation
- •Maintain a healthy body weight; obesity drives chronic low-grade inflammation and elevated WBC
- •Eat an anti-inflammatory diet rich in fruits, vegetables, omega-3 fatty acids, and fiber
- •Minimize alcohol consumption — excess alcohol suppresses bone marrow function
- •Stay hydrated — dehydration can falsely concentrate WBC counts
- •Address chronic infections or dental issues that may drive persistent WBC elevation
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Historical Trend
Resources & Studies
All Readings
| Date | Value | Change |
|---|---|---|
| 2026-01-28 | 5.9 Thousand/uL | -2.2 |
| 2025-09-18 | 8.1 Thousand/uL | -0.9 |
| 2025-08-25 | 9 Thousand/uL | +1.0 |
| 2025-07-31 | 8 Thousand/uL | +0.4 |
| 2025-06-27 | 7.6 Thousand/uL | — |