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Search Term: vitamin K


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  • Questions & Answers [hide all summaries]
    (September 2015)
    In response to our recent article on osteoporosis, a reader asks for our opinion regarding the use of the dietary supplement PROSTEON for this disorder. See our independent assessment of this supplement.
  • Should Vitamins Be Regulated As Drugs? [hide all summaries]
    (June 2010)
    Increasing knowledge about the risks and, in some cases, lack of benefits of vitamins suggests that by classifying vitamins as drugs, companies would be forced to give patients much more information than they now provide and would have to back medical claims for efficacy and safety with evidence. The article also provides recent evidence of previously unknown harms from certain vitamins and updates on current knowledge about the 13 most commonly used vitamins.
  • Review of Adverse Effects and Contraindications of Various Dietary Supplements Used for Weight Loss [hide all summaries]
    (December 2002)
    Ephedra, or ma huang, the natural form of the stimulant ephedrine, the most infamous and dangerous drug found in dietary supplements sold for weight loss, is at last beginning to receive the negative notoriety it deserves. Ephedra causes heart attacks and strokes because of its ability to raise blood pressure and heart rate. Article discusses the risk of other dietary supplements.

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