Phytonadione / Phylloquinone (Vitamin K1)
Phytonadione / Phylloquinone (Vitamin K1) is a tier 1 form of Vitamin K, used in 3,318 on-market products .
3,318
on-market products
tier 1
quality tier
n/a
elemental fraction
Why this tier: Best-studied form and basis of the AI, but has a much shorter half-life than MK-7 (Schurgers 2007).
Source: Schurgers LJ et al. 2007, Blood 109(8):3279-83, PMID 17158229