Dosage Lookup
Vitamin K2
3.0
Moderate
consensus
Consensus Protocol
Dosage
- 100-200mcg MK-7 daily is the commonly cited supplemental dose
- No expert specifies an exact K2 dosage in analyzed videos — Hyman and Johnson take it as part of a combined D3/K2 supplement
Form
- MK-7 (menaquinone-7) is the most common supplemental form due to longer half-life
- Combined D3/K2 supplements are the most practical format
- Food sources include natto (highest K2 content), hard cheeses, egg yolks, and grass-fed butter
Timing
- Take with a fat-containing meal for absorption, same as vitamin D
- Morning or midday preferred
- Take alongside vitamin D3 for synergistic calcium metabolism
Notes
- Individuals on warfarin or other anticoagulants must consult their physician before supplementing with any form of vitamin K — it can interfere with blood-thinning medication
- Vitamin K2 (MK-7) has a longer half-life than K1, meaning consistent daily dosing maintains more stable blood levels
- There is no established RDA specifically for K2 — only for total vitamin K (90-120mcg/day)
Expert Positions
What Each Expert Says
Huberman has zero mentions of vitamin K2 across his entire analyzed video library. Despite detailed coverage of vitamin D, magnesium, omega-3, creatine, and other supplements, K2 does not appear in any episode, AMA, or guest discussion. This absence is notable given the D3+K2 pairing recommended by Hyman, Patrick, and Johnson.
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