VitaminNo.013
Vitamin K2
Directs calcium to bones, supports clotting.
Typical / RDA90–120 mcg
Upper limitNone set
EvidenceModerate
How to take it
Timing With a mealFood With fatForm MK-7
What to know
Helps shuttle calcium into bone rather than arteries; often paired with vitamin D and calcium. Found in natto, cheese, and egg yolks.
Interactions & cautions
- Interferes with warfarin — keep intake consistent and tell your doctor.
Do you actually need it?
Mainly relevant if supplementing high-dose D and calcium.
Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.