Vitamin K helps prevent osteoporosis.

  Low vitamin K intake is associated with bone loss and fractures in people with osteoporosis. And some research suggests that chronic warfarin, a vitamin K antagonist, decreases bone density.

  Several studies suggest that supplementation with a specific form of vitamin K called menaquinone might increase bone density and reduce the risk for fracture.

  But all of the fracture data comes out of Japan. And there is no reliable evidence that taking the form of vitamin K available in the U.S. and Canada, phytonadione, can reduce fracture risk.

Get concise, unbiased advice for effective drug therapy, plus CE/CME

Prescriber's Letter includes:

  • 12 issues every year, with brief articles about new meds and guidelines
  • 48+ CE courses, including the popular CE-in-the-Letter
  • Quick reference drug comparison charts
  • Access to the entire archive

Already a subscriber? Log in

Volume pricing available. Get a quote