Low-dose vitamin K reduces INR excursions, but may not improve outcomes
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Bottom line: Low-dose vitamin K reduces INR excursions, but does not improve time in therapeutic range. This study did not have an adequate sample size to establish whether clinically meaningful outcomes would be affected, and low-dose vitamin K is not widely available in a commercial formulation with reliable dosages.
Evidence-based practice 20, no. 7 (2017): E13