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Benefits of Vitamin K2 (MK-7)

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Evidence-Based Benefits

  • Bone health — a 2013 RCT by Knapen et al. (n=244 postmenopausal women) found MK-7 at 180 mcg/day for 3 years significantly reduced age-related bone loss at the lumbar spine and femoral neck, and improved bone strength indices
  • Cardiovascular protection — K2 activates matrix Gla protein (MGP), the most potent known inhibitor of vascular calcification; the Rotterdam Study (2004, n=4,807) found high dietary K2 intake was associated with 52% lower risk of severe aortic calcification and 57% lower cardiovascular mortality over 10 years
  • Synergy with vitamin D3 — vitamin D increases calcium absorption, while K2 ensures that calcium is deposited in bones rather than accumulating in arteries; this combination may reduce the cardiovascular risk sometimes associated with calcium supplementation
  • Dental health — osteocalcin activation by K2 supports dentin mineralization and may reduce cavity formation; K2-dependent proteins are expressed in dental tissues

What the Research Says

Vitamin K2 has a growing evidence base particularly for bone and cardiovascular health. The 3-year RCT by Knapen et al. (2013, n=244) demonstrated that MK-7 at 180 mcg/day prevented age-related bone mineral density loss and improved bone strength in postmenopausal women. The landmark Rotterdam Study (Geleijnse et al., 2004, n=4,807) found that high dietary K2 (but not K1) intake was associated with significantly lower aortic calcification and cardiovascular mortality. Mechanistically, K2 activates both osteocalcin (bone formation) and MGP (calcification inhibition), providing a biological rationale for its dual bone and cardiovascular benefits. However, more large-scale RCTs are needed to confirm cardiovascular endpoint reduction.

Related Conditions

Joint PainHeart HealthBone Health
Full Vitamin K2 (MK-7) Guide

References

  1. (). Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporosis International. DOI
  2. (). Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam Study. Journal of Nutrition. DOI
  3. (). Vitamin K-containing dietary supplements: comparison of synthetic vitamin K1 and natto-derived menaquinone-7. Blood. DOI