Bone-Specific Alkaline Phosphatase (BSAP)
Isoform of alkaline phosphatase anchored to the outer membrane of osteoblasts, reflecting active skeletal mineralization.
Standard vs. Optimal Reference Rangesug/L
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.
7.0 - 20.0 ug/L
General reference distribution across unselected commercial populations.
8.0 - 15.0 ug/L
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Hydrolyzes inorganic pyrophosphate (a potent mineralization inhibitor) to promote hydroxyapatite crystal formation.
Differential Diagnosis
Elevated Levels (BSAP High)
- •Active bone turnover and osteoporosis
- •Paget disease of bone
- •Osteoblastic bone metastases
- •Rickets/Osteomalacia
Low Levels (BSAP Low)
- •Adynamic bone disease
- •Hypophosphatasia (genetic ALPL mutation)
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 BSAP
- Targeted imaging or functional organ assessment related to osteoblast mineralization activity
- Comprehensive metabolic and inflammatory baseline panel (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Physiological Dynamics of Bone-Specific Alkaline Phosphatase - The New England Journal of Medicine (2021). PMID: 33890124
- [2]BSAP 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 Bone-Specific Alkaline Phosphatase (BSAP) into overall healthspan optimization.