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2 peer-reviewed studies
What the evidence says
Vitamin K1 doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from medium-quality randomised trials published 2006–2023 with a typical study size of 35 participants.
Based on 2 studies · 1 RCT · 35 total participants
Confidence
LowBy outcome
1 study in the last 5 years
A randomized trial found vitamin K1 added to bisphosphonate did NOT significantly change BMD or bone turnover; only a modest per-protocol effect on hip geometry.
Moore AE et al. · Arch Osteoporos (2023)
A drugs-and-lactation database entry covers vitamin K in breast milk and newborn vitamin-K-deficiency bleeding.
(2006)