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Vitamin K2

Also known as Menaquinone, MK-4, MK-7

What it is: Fat-soluble vitamin K form
What it does: Activates vitamin K-dependent proteins that direct calcium into bone and teeth and away from soft tissues
Status: Widely used supplement
Evidence: Moderate. Moderate human data.
Uses: Bone and cardiovascular support; often paired with vitamin D3

Caution. Interacts with warfarin and related anticoagulants; keep vitamin K intake consistent if on these drugs.

Summary

Vitamin K2 (menaquinones) activates proteins such as osteocalcin and matrix Gla-protein that help direct calcium into bone and teeth and limit deposition in arteries and other soft tissues. It is frequently combined with vitamin D3 in bone and cardiovascular protocols. People on warfarin or similar anticoagulants need to keep vitamin K intake consistent and coordinate with their clinician.

Checked Jul 19, 2026.

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This entry summarises published information in plain language. It is not medical advice, a dosing recommendation or a substitute for a qualified healthcare professional. Many peptides are not approved for human use, and legal status varies by country. Check anything you rely on against primary sources.