4 forms · which to buy
Vitamin K
The form sold at a premium is often not the one the trials used. Here is every vitamin k we carry, what each was tested for, and at what dose.
Start with what you want it for
Each row is one reason people take vitamin k, and the form that actually has the evidence for it.
Strong
Also sold for this, without evidence we can stand behind: Vitamin K2 (MK-4).
Every form, side by side
A form with nothing listed is not a bad product — it means no trial we could find has tested it for anything we cover.
Sold for these too — with less behind it
Weaker evidence, conflicting results, or a claim we could not verify. The page for each says which.