Get tested with Superpower

If you’ve been postponing blood testing for years or feel frustrated by doctor appointments and limited lab panels, you are not alone. Standard healthcare is often reactive, focusing on testing only after symptoms appear or leaving patients in the dark.

Superpower flips that approach. We give you full insight into your body with over 100 biomarkers, personalized action plans, long-term tracking, and answers to your questions, so you can stay ahead of any health issues.

With physician-reviewed results, CLIA-certified labs, and the option for at-home blood draws, Superpower is designed for people who want clarity, convenience, and real accountability - all in one place.

Key benefits of White Blood Cells (WBC) testing

• Reveals how well your immune system is responding to infection or stress.
• Flags hidden infections before symptoms become severe or complications develop.
• Spots immune system imbalances that may explain fatigue or recurring illness.
• Guides antibiotic decisions by clarifying whether infection is bacterial or viral.
• Tracks recovery after illness, surgery, or chemotherapy to confirm healing progress.
• Detects bone marrow or blood disorders early when treatment is most effective.
• Best interpreted with your symptoms and differential count for precise insight.

What is White Blood Cells (WBC)?

White blood cells are living immune cells that circulate in your blood and tissues. They are produced primarily in your bone marrow and released into the bloodstream as part of your body's defense system.

Unlike red blood cells that carry oxygen, white blood cells are your immune system's mobile army. They patrol your body looking for infections, foreign invaders, and damaged cells.

Your body's frontline defenders

There are several types of white blood cells, each with specialized roles. Neutrophils attack bacteria, lymphocytes coordinate immune responses and produce antibodies, monocytes clean up debris, eosinophils fight parasites, and basophils trigger allergic reactions.

A window into immune activity

The total white blood cell count reflects how actively your immune system is working at any given moment. Your bone marrow constantly adjusts production based on signals from infection, inflammation, stress, or other immune challenges.

More than just infection fighters

White blood cells also participate in wound healing, tissue repair, and surveillance for abnormal cells. Their numbers and proportions tell a dynamic story about what's happening with your immune health.

Why is White Blood Cells (WBC) important?

White blood cells are your immune system's frontline defenders, patrolling blood and tissues to detect and neutralize infections, foreign invaders, and abnormal cells. A typical count ranges from about 4,000 to 11,000 cells per microliter, with optimal values usually sitting comfortably in the middle of that range. This biomarker reflects how well your body can mount an immune response and whether your bone marrow is producing cells at a healthy rate.

When your immune army runs too small

A low white blood cell count, called leukopenia, signals that your bone marrow isn't producing enough defenders or that cells are being destroyed too quickly. This leaves you vulnerable to frequent infections, slow wound healing, and fatigue. Causes range from autoimmune conditions and certain medications to nutritional deficiencies and bone marrow disorders.

When your immune system goes into overdrive

An elevated count, or leukocytosis, usually means your body is fighting an infection, responding to inflammation, or under physical stress. Chronic elevation can point to autoimmune disease, blood cancers like leukemia, or ongoing inflammatory conditions. You might experience fever, swelling, or unexplained fatigue.

The bigger immune picture

White blood cell counts connect directly to bone marrow health, spleen function, and inflammatory signaling throughout the body. Persistent abnormalities can signal deeper issues with immune regulation, increasing long-term risks for infection, autoimmune disease, or hematologic disorders.

What do my White Blood Cells (WBC) results mean?

Low white blood cell count

Low values usually reflect reduced immune cell production or increased destruction. This can occur with bone marrow suppression from certain medications, autoimmune conditions, viral infections, or nutritional deficiencies like B12 or folate. A persistently low count may signal reduced capacity to fight infection and slower wound healing. Some people have benign ethnic neutropenia, a harmless inherited pattern more common in individuals of African or Middle Eastern descent.

Optimal white blood cell count

Being in range suggests balanced immune surveillance and appropriate inflammatory tone. Your bone marrow is producing white cells at a steady rate, and your body is clearing old or damaged cells efficiently. Most healthy adults sit in the mid to lower portion of the reference range, typically between 4,000 and 9,000 cells per microliter.

High white blood cell count

High values usually reflect an active immune response to infection, inflammation, physical stress, or tissue injury. Acute bacterial infections commonly drive counts upward. Chronic elevation may indicate ongoing inflammation, smoking, steroid use, or less commonly, a bone marrow disorder. Pregnancy and intense exercise can also raise counts temporarily.

Factors that influence white blood cell levels

White blood cell counts fluctuate with time of day, hydration, stress, and recent illness. Corticosteroids, lithium, and some antibiotics can elevate counts, while chemotherapy and immunosuppressants lower them. Always interpret results alongside symptoms and clinical context.