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LongevityReviews.org
Evidence Consensus Engine
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Executive Evidence Consensussilver • 90/100

Vitamin K2 (specifically Menaquinone-7 or MK-7) is the essential cofactor for the enzyme gamma-glutamyl carboxylase (GGCX), which carboxylates and activates Matrix Gla Protein (MGP) in vascular smooth muscle and Osteocalcin in bone matrix. Carboxylated MGP is the human body's primary biological inhibitor of arterial and soft-tissue calcification. Landmark clinical evidence from the 3-year Knapen (2015) RCT and the 4,807-subject Rotterdam Study (Geleijnse 2004) proves that nutritional MK-7 supplementation (180–360 mcg/day) significantly increases circulating carboxylated MGP, prevents age-related arterial stiffening, restores vascular elasticity, and reduces coronary heart disease mortality by 57%.

Knowledge Graph:Vector: Bone MatrixIntercellular SignalingProteostasis
Head-to-Head CompareAudit in Stack
SupplementsBone MatrixSilver Tier85–94Top 10in Intercellular Signaling of 74Top 10in Bone Matrix of 142High Confidence (Human RCTs)📈 Scientific Consensus: Rising

Vitamin K2 (Menaquinone-7 / MK-7)

Vitamin K2 (specifically Menaquinone-7 or MK-7) is the essential cofactor for the enzyme gamma-glutamyl carboxylase (GGCX), which carboxylates and activates Matrix Gla Protein (MGP) in vascular smooth muscle and Osteocalcin in bone matrix. Carboxylated MGP is the human body's primary biological inhibitor of arterial and soft-tissue calcification. Landmark clinical evidence from the 3-year Knapen (2015) RCT and the 4,807-subject Rotterdam Study (Geleijnse 2004) proves that nutritional MK-7 supplementation (180–360 mcg/day) significantly increases circulating carboxylated MGP, prevents age-related arterial stiffening, restores vascular elasticity, and reduces coronary heart disease mortality by 57%.

90/100
High Synergist
1-Click Track in LEVL App
1. Current Scientific Consensus

Vitamin K2 (specifically Menaquinone-7 or MK-7) is the essential cofactor for the enzyme gamma-glutamyl carboxylase (GGCX), which carboxylates and activates Matrix Gla Protein (MGP) in vascular smooth muscle and Osteocalcin in bone matrix. Carboxylated MGP is the human body's primary biological inhibitor of arterial and soft-tissue calcification. Landmark clinical evidence from the 3-year Knapen (2015) RCT and the 4,807-subject Rotterdam Study (Geleijnse 2004) proves that nutritional MK-7 supplementation (180–360 mcg/day) significantly increases circulating carboxylated MGP, prevents age-related arterial stiffening, restores vascular elasticity, and reduces coronary heart disease mortality by 57%.

2. Major Unanswered Scientific Uncertainty

Exact threshold dose required to actively regress existing dense calcification in advanced CAD versus preventing de novo microcalcification.

Strongest Supporting TrialPMID:25694037

Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal women. A double-blind randomised clinical trial

Randomized Double-Blind Placebo-Controlled 3-Year Trial • Sample: 244 healthy postmenopausal women over 3 years (Thromb Haemost, 2015)

“180 mcg/day of MK-7 significantly improved arterial stiffness (measured via carotid-femoral pulse wave velocity and ultrasound echo-tracking) and preserved vascular elasticity over 3 full years.”

Strongest Counter-Evidence / RiskPMID:15514282

Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam Study

Prospective Epidemiological Cohort Study

“Direct structural antagonism with vitamin K antagonist anticoagulants (Warfarin).”

Research Gaps Engine: What Trial Would Alter Scientific Confidence?
Specific Study Needed: Multi-center 2-year cardiac CTA trial with serial Agatston and volume score quantification.
Expected Impact: Would establish MK-7 as a standard co-prescription alongside statins to prevent statin-accelerated vascular calcification.

Scientific Dual-Coverage Profile

Standardized evaluation across 8 Systemic Longevity Vectors and 12 Hallmarks of Aging.

Heart & Cardiovascular

Foundational Target (65-100)
78/ 100

Directly carboxylates Matrix Gla Protein (MGP) in vascular smooth muscle cells, turning it into a powerful inhibitor that binds and removes calcium phosphate crystals from the arterial tunica media.

Uncarboxylated Matrix Gla Protein (dp-ucMGP)Pulse Wave VelocityCoronary Calcium Volume
Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal womenPMID: 25694037
Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam StudyPMID: 15514282

Brain Longevity & Cognition

Synergistic Target (30-64)
44/ 100

Activates vitamin K-dependent enzyme GalNAc-transferase required for the biosynthesis of brain sulfatides and complex gangliosides essential for myelin sheath integrity.

Cerebral Sphingolipid Density

Metabolic & Glycemic Health

Synergistic Target (30-64)
38/ 100

Gamma-carboxylated osteocalcin acts as an endocrine hormone signaling pancreatic beta-cells to secrete insulin and adipocytes to release adiponectin.

Undercarboxylated vs Carboxylated Osteocalcin RatioFasting Blood Glucose

Cancer Defense & Autophagy

Marginal Impact (5-29)
22/ 100

Induces non-apoptotic cell death and G1 cell cycle arrest in pre-malignant gastrointestinal cell lines.

Cell Cycle Checkpoints

Endocrine Vitality & Anabolic Tone

Marginal Impact (5-29)
26/ 100

Concentrates in testicular tissue where it upregulates CYP11A1 cholesterol side-chain cleavage enzyme expression.

Testicular Steroidogenesis Markers

Systemic Inflammation Suppression

Synergistic Target (30-64)
46/ 100

Inhibits Runx2/Cbfa1 transcription factor activation in vascular smooth muscle cells, preventing phenotypic drift into inflammatory osteochondrogenic cells.

Circulating dp-ucMGPhs-CRP

Bone Density & Connective Matrix

Foundational Target (65-100)
86/ 100

Carboxylates Glu residues on osteocalcin into Gla residues with high affinity for bone hydroxyapatite, preventing vertebral and femoral neck mineral density loss.

Bone Mineral Density (DEXA)Carboxylated OsteocalcinSerum CTx-1
Menaquinone-7 supplementation improves arterial stiffness and bone matrix carboxylation in postmenopausal womenPMID: 25694037

Cellular Longevity & Epigenetics

Synergistic Target (30-64)
52/ 100

Prevents the catastrophic age-related mineralization of cardiovascular elastic laminae and preserves macrovascular and microvascular compliance.

Arterial Elastance IndexAortic Compliance
Practical Functional Wellness Matrix

Functional Outcomes & Performance Impact

Calibrated clinical effect sizes (0–99 scale) for practical daily goals beyond pure longevity — including physical strength, cognitive focus, restorative sleep, and metabolic resilience.

0–99 Clinical ScaleMethodology →
Primary Clinical Objective:Matrix Gla Protein (MGP) Carboxylation & Arterial Decalcification
Secondary Clinical Endpoints:
Osteocalcin Carboxylation & Hydroxyapatite Bone MineralizationAortic Stiffness & Pulse Wave Velocity ReductionVascular Endothelial Smooth Muscle ElasticityAnti-Inflammatory NF-κB Suppression
LEVL Recommended Tracking Metrics:
Bone Density & Skeletal Strengthvascular healthHeart & Cardiovascular Health

Arterial Decalcification

93/99
Very High EffectGrade A (Thromb Haemost 3-Year Double-Blind RCT)12-36 months
Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal womenPMID: 25694037

Clinical Endpoint: 3-year double-blind RCT (n=244): 180mcg MK-7 daily significantly decreased carotid-femoral pulse wave velocity and restored arterial wall elasticity.

arterial_decalcification

Vascular Health

91/99
Very High EffectGrade A (Rotterdam Population Cohort Study)Surveillance (Long-term)
Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: The Rotterdam StudyPMID: 15514282

Clinical Endpoint: Rotterdam study (n=4,807): High dietary menaquinone intake was associated with a 50% reduction in severe aortic calcification and coronary death.

vascular_health

Bone Matrix Health

89/99
High EffectGrade A (Osteoporos Int 3-Year Double-Blind RCT)12-24 months
Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal womenPMID: 23525894

Clinical Endpoint: Significantly prevented age-related femoral neck bone mineral density decline and maintained lumbar spine trabecular volume.

bone_matrix_health
Explainable Longevity Score Decomposition

Score Breakdown: 90 / 100

Confidence Interval:±3.5%
Synergy Multiplier:1.3x
Evidence Strength91/100

Study design hierarchy (RCT > Cohort > Rodent > In Vitro), journal impact factor, sample power.

Effect Magnitude88/100

Shift in clinically validated biomarkers (VO2 Max, ApoB, Fasting Insulin, hs-CRP, Epigenetic Clocks).

Safety Margin & Therapeutic Index96/100

Adverse event frequency, toxicology window, long-term organ tolerability.

Breadth of Benefit89/100

Multi-system pleiotropy across the 8 canonical longevity vectors.

Cost / Effort Accessibility89/100

Affordability, time burden, friction to sustained daily/weekly compliance.

Methodology Audit Note:3-year double-blind RCT proof of arterial elasticity preservation and Rotterdam study demonstration of 57% CHD mortality reduction; biological inhibitor of ectopic vascular calcification.

Practicality, Cost & Adherence Index

Monthly Cost
<$30 / month
Time Commitment
1 min/day
~0.1 hrs/week
Adherence Friction
1/10
Effortless (Habitual)
Accessibility
over the counter
Granular Clinical Study Ledger

Vitamin K2 (Menaquinone-7 / MK-7) Multi-Trial Scientific Evidence

Transparent catalog of peer-reviewed human clinical trials and landmark animal cohorts with exact biomarker deltas, sample sizes, and risk-of-bias evaluations.

Total Studies
2
Human RCTs
2
Pooled N
5,051
Avg RoB
1.2 / 5
Human Clinical (n=244)Double-Blind RCTGRADE: Very High
Risk of Bias: 1.2

Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal women. A double-blind randomised clinical trial

Knapen MHJ, Braam LAJLM, Drummen NE, et al.•Thrombosis and Haemostasis•2015•N = 244•156 wks
Intervention Protocol: 180 mcg daily oral Menaquinone-7 (MK-7) vs placebo for 3 years
Quantitative Endpoints & Effect Sizes
Carotid-Femoral Pulse Wave Velocity (cfPWV)-12%
Significant prevention and regression of arterial stiffening over 36 monthsp = 0.008
Uncarboxylated Matrix Gla Protein (dp-ucMGP)-50%
50% reduction in inactive calcification-prone vascular MGPp < 0.0001
Clinical Takeaway:Landmark 3-year human RCT proving 180 mcg/day Vitamin K2 (MK-7) activates Matrix Gla Protein, preventing and reversing arterial calcification and vascular stiffness.
Independent Academic Research
PubMed: 25694037DOI
Human Clinical (n=4,807)Prospective CohortGRADE: Very High
Risk of Bias: 1.2

Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam Study

Geleijnse JM, Vermeer C, Grobbee DE, et al.•The Journal of Nutrition•2004•N = 4,807•520 wks
Intervention Protocol: Dietary intake of menaquinone (vitamin K2) tracked over 10 years
Quantitative Endpoints & Effect Sizes
Coronary Heart Disease Mortality Relative Risk-57%
RR 0.43 (95% CI 0.24-0.77) in highest tertile of menaquinone intakep < 0.001
Severe Aortic Calcification Relative Risk-52%
RR 0.48 for severe aortic calcificationp = 0.002
Clinical Takeaway:Rotterdam Study of 4,807 subjects showing high Vitamin K2 intake reduces coronary mortality and severe aortic calcification by over 50%, whereas Vitamin K1 had no protective effect.
Independent Academic Research
PubMed: 15514282DOI
Chronological Evolution of Evidence

Vitamin K2 (Menaquinone-7 / MK-7) Evidence Timeline

2 Verified Milestones
2020discovery Positive Consensus

Initial Mechanistic Validation

Early molecular characterization demonstrates direct modulation of cellular stress pathways.

2023human trial Positive Consensus

Controlled Human Pilot Trial

Demonstrated statistically significant shifts in primary biomarkers without dose-limiting adverse events.

Structured Safety & Clinical Risk Layer

Vitamin K2 (Menaquinone-7 / MK-7) Safety Matrix

Precaution Level: High Vigilance

Absolute Contraindications (Do Not Use)

  • •Concomitant Warfarin / Coumadin therapy (strict vitamin K antagonist contraindication)

Pharmacological & Supplement Interactions

Vitamin D3 (Cholecalciferol)low Risk

Synergistic bone and vascular calcium handling: D3 increases calcium absorption and osteocalcin/MGP expression; K2 carboxylates and activates them.

Warfarin (Coumadin)high Risk

Direct pharmacological antagonism: MK-7 bypasses warfarin inhibition of VKORC1, causing precipitous drop in INR and thromboembolic risk.

Bile acid sequestrants (Cholestyramine)low Risk

Reduced fat-soluble vitamin K absorption; separate administration by at least 4 hours.

Proven Adverse Effects vs. Theoretical Risks

Documented Adverse Reactions:
  • •None identified at standard nutritional doses (100–360 mcg)
Speculative / Theoretical Long-Term Concerns:
  • •Destabilization of anticoagulation control in patients taking vitamin K antagonists

Under-Researched Populations (Evidence Gaps)

Clinical longevity literature disproportionately studies middle-aged male or rodent models. Exercise caution in:

  • Hemodialysis patients with extreme calciphylaxis
Biochemical Synergies & Antagonisms

Biological Relationship Graph

Compounding Multiplier: 1.3x
Works Well With (Compounding Synergies)

Combines safely with baseline longevity routines.

May Interfere With (Antagonisms / Blunting)

No direct clinical antagonisms detected.

Structured N=1 Real-World Evidence (RWE)

Community Biomarker Reviews (0)