Absolute Neutrophil Count (ANC)
Absolute Neutrophil Count measures circulating polymorphonuclear granulocytes, the primary cellular first responders of the innate immune system.
Standard vs. Optimal Reference Ranges× 10³/μL
Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.
Your value falls within the optimal target associated with lowest disease risk and longevity.
1.8 - 7.7 × 10³/μL (or 40% - 70% of total WBC)
General reference distribution across unselected commercial populations.
2.0 - 4.5 × 10³/μL
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Produced in bone marrow and mobilized by G-CSF. Neutrophils phagocytose bacteria, release antimicrobial peptides from primary/secondary granules, and extrude neutrophil extracellular traps (NETs).
Differential Diagnosis
Elevated Levels (ANC High)
- •Acute bacterial infections
- •Systemic inflammatory syndromes
- •Corticosteroid therapy (demargination of neutrophils from vessel walls)
- •Cigarette smoking
Low Levels (ANC Low)
- •Benign ethnic neutropenia (Duffy-null / DARC antigen variant)
- •Autoimmune neutropenia
- •Chemotherapy or drug-induced agranulocytosis
- •Severe viral infections
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Fasting is not strictly required for standard Complete Blood Count, but consistent morning timing is advised due to circadian fluctuations in leukocyte counts. Venipuncture must be performed with minimal stasis in K2-EDTA tubes and gently inverted 8 to 10 times to prevent microclots. Dehydration causes hemoconcentration and spuriously elevates cellular counts; ensure normal fluid intake before testing.
Reflexive Testing Protocol:
- Peripheral Blood Smear with manual microscopic review to evaluate cellular morphology, poikilocytosis, and blast cells
- Reticulocyte Count and Reticulocyte Hemoglobin Equivalent (Ret-He) to assess dynamic bone marrow erythropoietic response
- Complete Iron Panel (Ferritin, Serum Iron, TIBC, Transferrin Saturation) and Soluble Transferrin Receptor
- Serum Methylmalonic Acid and Homocysteine to screen for functional Vitamin B12 and Folate deficiencies
- Hemoglobin Electrophoresis or High-Performance Liquid Chromatography (HPLC) if hemoglobinopathy or thalassemia is suspected
Clinical Citations & Primary Literature (1)
- [1]Neutrophils in Atherosclerosis and Chronic Inflammatory Aging - Circulation Research (2021). PMID: 33793325
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Absolute Neutrophil Count (ANC) into overall healthspan optimization.