Vitamin K2 (MK-7) Effects on the Body

Primary Biological Functions

• The American College of Cardiology recommends vitamin K2 for its role in blood clotting, as it carboxylates coagulation factors II, VII, IX, and X, making them functionally active 2

Clinical Evidence for Health Benefits

• Vitamin K2 has anti-inflammatory effects, as evidenced by its correlation with lower concentrations of inflammatory markers in vivo, potentially through suppression of NF-κB signal transduction 3, 4
• The European Food Safety Authority (EFSA) and Institute of Medicine (IOM) have established an adequate intake (AI) for vitamin K, but only for K1, highlighting a significant gap in nutritional guidance for vitamin K2 1, 7

Safety Profile

• Clinical Nutrition guidelines state that vitamin K1 and K2 are not associated with toxicity, and MK-7 has a documented history of safe and effective use without adverse effects 1, 4, 6

Critical Clinical Caveat

• Patients on warfarin or other anti-vitamin K drugs must maintain consistent vitamin K intake and avoid sudden major changes, as vitamin K2 can overcome warfarin's effect, and blood clotting tests require monitoring 1, 2, 4

Dietary Sources

• Fermented cheeses are a major source of vitamin K2, and full-fat dairy products and fermented dairy also provide K2, according to Praxis Medical Insights 5