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September 22/29, 1999

Vitamin K–Supplemented Snacks Containing Olestra: Implication for Patients Taking Warfarin

Author Affiliations

Margaret A.WinkerMD, Deputy EditorIndividualAuthorPhil B.FontanarosaMD, Interim CoeditorIndividualAuthor

JAMA. 1999;282(12):1133-1134. doi:10-1001/pubs.JAMA-ISSN-0098-7484-282-12-jbk0922

To the Editor: Olestra, the Food and Drug Administration (FDA)–approved fat substitute contained in snack foods, lists an unspecified amount of vitamin K as an additive.1,2 This raises concern because patients taking warfarin are typically educated about the need to maintain a consistent intake of foods containing vitamin K. Thus, vitamin K found in this unexpected source warrants further assessment.