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Immune System

Neutrophils

White blood cells that respond first to infection or tissue damage.

What is Neutrophils?

Neutrophils can increase with bacterial infections, stress responses, or inflammation and may fluctuate during recovery. They are most informative when viewed with total leukocytes, CRP, and the full differential. Trends help distinguish an acute response from a persistent pattern.

Why is Neutrophils relevant?

Neutrophils are the first-line response of your immune system: they flow rapidly to sites of tissue damage or bacterial infection and clear pathogens. Their count often spikes sharply during acute infections or during intense physical or psychological stress, and falls again as the body recovers. For people who train hard or go through stressful periods, the marker therefore moves with strain and recovery.

How to read Neutrophils in context

Neutrophils are always read within the differential — alongside the other white blood cells, total leukocytes, and optionally CRP. An isolated elevation without context (infection, training, stress, medication) is often not concerning yet but warrants repetition. Low values carry more urgency and are almost always followed up immediately in light of the rest of the count.

Neutrophils is one of 100+ biomarkers in the Optimize panel. Book a blood draw at any of 238+ partner labs in the Netherlands, or upload your existing results in the app.

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