Serum Haptoglobin (Hp)
Hepatic alpha-2 glycoprotein that binds free hemoglobin released during intravascular hemolysis with extremely high affinity.
Standard vs. Optimal Reference Rangesmg/dL
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.
30 - 200 mg/dL
General reference distribution across unselected commercial populations.
50 - 150 mg/dL
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Forms haptoglobin-hemoglobin complexes cleared by CD163 macrophage scavenger receptors, preventing renal tubular oxidative injury.
Differential Diagnosis
Elevated Levels (Hp High)
- •Acute and chronic systemic inflammation (acute phase response)
- •Biliary obstruction
- •Corticosteroid therapy
Low Levels (Hp Low)
- •Intravascular and extravascular hemolytic anemia
- •Ineffective erythropoiesis
- •Severe liver failure
- •Congenital ahaptoglobinemia
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Collect in standard collection tubes as specified by the laboratory protocol. Avoid hemolysis and process serum/plasma promptly within 2 hours. Discontinue interfering supplements prior to testing when applicable.
Reflexive Testing Protocol:
- Confirmatory testing and secondary biomarker panel evaluation for Hp
- Targeted imaging or functional organ assessment related to free hemoglobin scavenging & hemolysis
- Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Physiological Dynamics of Serum Haptoglobin - The New England Journal of Medicine (2021). PMID: 33890124
- [2]Hp in Human Longevity and Pathophysiological Risk Stratification - The Lancet (2022). PMID: 35122901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Serum Haptoglobin (Hp) into overall healthspan optimization.