Fat-soluble vitamin essential for calcium metabolism and bone health. Works synergistically with Vitamin D to direct calcium into bones rather than arteries.
How it works
Activates matrix Gla-protein (MGP) and osteocalcin, which regulate calcium deposition in bones and prevent arterial calcification.
Evidence-based uses
MK-7 form preferred for longer half-life. Essential companion to Vitamin D supplementation for bone and cardiovascular health.
Clinical Evidence
MK-7 supplementation (180mcg/day) significantly decreased age-related bone mineral density decline and improved bone strength indices.
Safety
Vitamin K directly opposes the anticoagulant effect of warfarin. Any vitamin K supplementation requires careful INR monitoring and physician oversight.
Compare prices
4 products compared across Australian retailers. Sorted by price per serve.
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| Product | Price | /serve | |
|---|---|---|---|
Best NOW Foods NOW MK-7 Vitamin K2 100mcg iHerb | $22.50 | $0.19 | |
Life Extension Life Extension Super K Life Extension | $28.00 | $0.31 | |
Garden of Life mykind Organics Vitamin K2 Garden of Life | $34.50 | $0.58 | |
Thorne Thorne Vitamin K2 (MK-4) Thorne | $36.00 | $1.20 |
Prices in AUD. Some links are affiliate links — we may earn a commission at no extra cost to you.
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Vitamin K2 has 1 known interaction. Check if it's safe with your medications.
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This information is for educational purposes only and is not intended as medical advice. Always consult a healthcare professional before starting any supplement. Evidence ratings are based on peer-reviewed clinical research. Individual results may vary.