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Biomarker Encyclopedia

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Home/Biomarkers/Endocrinology & Hormones/ucOC
Endocrinology & HormonesFunctional Vitamin K Bone Sufficiency

Undercarboxylated Osteocalcin (ucOC)

Fraction of bone osteocalcin lacking gamma-carboxylation on its three glutamate residues due to inadequate vitamin K co-factor.

Standard Range<2.0 ng/mL (or <20% total osteocalcin)
Optimal Longevity<1.0 ng/mL
Measurement Unitng/mL
Organ SystemFunctional Vitamin K Bone Sufficiency
Routine Panels:Bone Micronutrient ProfileVitamin K Function

Standard vs. Optimal Reference Rangesng/mL

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.

Interactive Range Analyzer
Unit: ng/mL
ng/mL
Presets:
0 ng/mLOptimal Zone Target3 ng/mL
Optimal Longevity Zone(0.5 ng/mL)

Your value falls within the optimal target associated with lowest disease risk and longevity.

Standard Reference Interval

<2.0 ng/mL (or <20% total osteocalcin)

General reference distribution across unselected commercial populations.

Optimal Longevity Target

<1.0 ng/mL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Lacks the negative charge required to bind ionic calcium (Ca2+) in bone hydroxyapatite crystal lattice.

Differential Diagnosis

Elevated Levels (ucOC High)

  • •Functional vitamin K deficiency in bone
  • •Warfarin anticoagulation therapy
  • •High osteoporotic fracture risk

Low Levels (ucOC Low)

  • •Optimal vitamin K bone status
  • •Complete osteocalcin gamma-carboxylation

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways
At the molecular level, Undercarboxylated Osteocalcin (ucOC) plays an essential physiological role in functional vitamin k bone sufficiency. Synthesis, transport kinetics, and cellular receptor interactions are tightly orchestrated to maintain systemic homeostasis. Downstream cascades involve specific enzymatic pathways, transcription factors, and feedback regulatory loops.
Longevity Risk Architecture & Epidemiology
Direct functional biomarker for tissue vitamin K deficiency in bone; high levels predict hip fracture risk in postmenopausal women.
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 ucOC
  • Targeted organ system imaging or functional dynamic testing related to functional vitamin k bone sufficiency
  • Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
  • [1]Clinical Reference and Molecular Physiology of Undercarboxylated Osteocalcin - The New England Journal of Medicine (2021). PMID: 33990124
  • [2]ucOC Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35222901
Common Panels:Bone Micronutrient ProfileVitamin K Function
View All Panels

Associated Longevity Guides & Clinical Calculators

Medicine 3.0

Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Undercarboxylated Osteocalcin (ucOC) into overall healthspan optimization.

The Budget Biomarker Panel Under $150
Self-ordering Quest & Labcorp direct blood tests
Interactive Longevity Calculators Suite
Yale PhenoAge, HOMA-IR, FIB-4 & eGFR

Related Endocrinology & Hormones Biomarkers

High-Sensitivity C-Reactive Protein
hs-CRP · < 0.5 mg/L
Serum Creatinine
Cr · 0.8 - 1.1 mg/dL (stable across time)
Apolipoprotein B
ApoB · < 60 mg/dL (or < 50 mg/dL in high-risk phenotypes)
PreviousSerum Menaquinone-7 (Vitamin K2) (MK-7 / Vit K2)Micronutrients & VitaminsNextDephosphorylated-Uncarboxylated MGP (dp-ucMGP)Cardiovascular & Lipidology