2 forms studied

Does vitamin k help with joint pain?

Yes — but only in one form. Vitamin K2 (MK-7) is the one that was tested, and the others sold for this do not carry the same evidence.

Form by form

Strongest first. Evidence for one salt or ester is not evidence for another, so each is rated on its own trials.

Trials used 90–180 mcg · 2 studies

Trials used 15–45 mg · 1 study · tested as Vitamin K2 (MK-7)

Worth knowing before you buy. Vitamin K2 (MK-4) is widely sold for joint pain, but the trials behind that use tested vitamin k2 (mk-7) instead.