Serum Sclerostin (SOST)
Glycoprotein secreted exclusively by mature osteocytes embedded within mineralized bone matrix that acts as a potent negative regulator of bone formation.
Standard vs. Optimal Reference Rangespmol/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.
25 - 65 pmol/L (300 - 800 pg/mL)
General reference distribution across unselected commercial populations.
30 - 55 pmol/L
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Binds LRP5/6 and Frizzled co-receptors on osteoblasts, inhibiting canonical Wnt/beta-catenin signaling and arresting osteoblast differentiation.
Differential Diagnosis
Elevated Levels (SOST High)
- •Osteoporosis with suppressed osteoblast bone formation
- •Vascular medial arterial calcification in CKD
- •Prolonged immobilization and mechanical unloading
Low Levels (SOST Low)
- •Sclerosteosis and van Buchem disease (genetic SOST deficiency with massive hyperostosis)
- •Romosozumab therapeutic response
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Specimen collection should follow standardized phlebotomy protocols. Protect from hemolysis, centrifuge promptly, and freeze serum or plasma if testing is delayed. Patient should be in a resting, fasting state where indicated.
Reflexive Testing Protocol:
- Confirmatory testing and secondary biomarker quantification for SOST
- Targeted organ system imaging or functional dynamic testing related to osteocyte wnt-lrp5 bone formation brake
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Serum Sclerostin - The New England Journal of Medicine (2021). PMID: 34190124
- [2]SOST Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Serum Sclerostin (SOST) into overall healthspan optimization.