Tier 1: Strong Evidencecapsule

Vitamin K2

MK-7 (Menaquinone-7) — 180 mcg

$16/month (30-day supply)

What it does

Vitamin K2 MK-7 is the long-acting form that ensures calcium goes where it belongs: into your bones and teeth, not your arteries. It activates osteocalcin (bone protein) and matrix GLA protein (prevents arterial calcification). MK-7 has a longer half-life than MK-4, meaning one daily dose maintains consistent blood levels.

Key benefits

Bone mineralisation
Arterial health
Dental health
Synergistic with D3

The evidence

Rotterdam Study showed 57% reduced risk of heart disease with adequate K2 intake. MK-7 form has superior bioavailability and longer half-life vs MK-4.

Important

If you take warfarin or other blood thinners, consult your doctor before supplementing K2 — it affects clotting factor synthesis.