Guest guest Posted January 16, 2008 Report Share Posted January 16, 2008 Merck at http://www.merck.com/mmpe/sec01/ch004/ch004m.html Vitamin K_1 (phylloquinone) is dietary vitamin K. Dietary fat enhances its absorption. Infant formulas contain supplemental vitamin K. Vitamin K_2 refers to a group of compounds (menaquinones) synthesized by bacteria in the intestinal tract; the amount synthesized does not satisfy the vitamin K requirement. Vitamin K_1 (phylloquinone) is not toxic when consumed orally, even in large amounts. However, menadione (a synthetic, water-soluble vitamin K precursor) can cause toxicity and should not be used to treat vitamin K deficiency. I did read high dose vitamin K associated with leukemia. May have been K3. Will research and repost. I am sorry if I scared anyone. Quote Link to comment Share on other sites More sharing options...
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