What it does
Are forms of vitamin K2, a family involved in activation of vitamin K-dependent proteins.
Possible deficiency symptoms
There is no separate symptom checklist that diagnoses an MK-4 or MK-7 deficiency.
Food sources
Some cheeses and fermented foods; natto is a source of MK-7.
Supplement forms
Menaquinone-4 (MK-4) and menaquinone-7 (MK-7).
Before taking a supplement
Vitamin K can interfere with warfarin. A supplement is not a substitute for osteoporosis assessment.
Questions for your visit
Could my diet, medicines, absorption or another condition explain my concern? What evidence would support treatment, and how would we check whether it helps?
Names you may see
MK-4 & MK-7
Sources & perspective
This is an editorial adaptation of the Purser Wellness nutrient reference app. Purser teaching connections are labeled separately from clinical interpretation. Private cases and individual treatment protocols are not reproduced.
Use the public resources below for additional context.
NIH Office of Dietary Supplements: MK-4 & MK-7
