01
Why supplement?
✓
Supports normal blood clotting
Vitamin K is a cofactor the liver needs to make several clotting proteins.
Mechanism: Established✓
Involved in bone metabolism
Vitamin K is involved in activating bone-related proteins.
Research evidence: PreliminaryADVERTISEMENT
02
How to take it
With foodWith food
Best timeAnytime
For people on warfarin, the priority is a stable daily intake—not cutting out vitamin K entirely.
General wellness120 mcg/day for adult men; 90 mcg/day for adult women (AI)
Specific needsTreatment of deficiency or clotting disorders is decided by a doctor.
How oftenUse the adequate daily intake; anyone on anticoagulants must ask a doctor first.
03
What to watch
Cautions
People on warfarin should not change vitamin K intake on their own; keep it stable and follow medical monitoring.
People with cholestasis or fat malabsorption should ask a doctor first.
Common side effects
· Usual food and supplement amounts are generally well tolerated
Rare but important
· Unstable anticoagulation control may increase thrombosis risk.
Long-term dependenceDoes not cause addiction or typical tolerance.