title: Development of a diet low in vitamin K-1 (phylloquinone).
abstract: As part of a metabolic study aimed at inducing a subclinical vitamin K deficiency in healthy adults, we designed a diet containing less than 10 micrograms/day of vitamin K-1 (phylloquinone). Two-day menus were constructed from a vitamin K-1 food database developed in our laboratory. This diet offers palatability and provides nutrient adequacy; that is, it meets the Recommended Dietary Allowances for protein and all other vitamins and minerals. An interesting feature of the diet is that the vitamin K-1 level can be kept very low while still fulfilling a large range of energy needs (1,800 to 3,400 kcal/day). The diet proved useful in altering apparent nutritional status for vitamin K-1; after ingestion of the diet for 6 days, plasma concentrations of vitamin K-1 decreased by 80% and fell below the established normal range. Given the well documented drug-nutrient interaction between vitamin K and warfarin--a vitamin K antagonist routinely used in the management of thromboembolic diseases--the dietary information presented in this report may provide useful information for patients undergoing warfarin therapy.
authors.affiliation: School of Nutrition, Tufts University, Boston, MA 02111.
authors.forename: G
authors.initials: G
authors.lastname: Ferland
authors.forename: D L
authors.initials: DL
authors.lastname: MacDonald
authors.forename: J A
authors.initials: JA
authors.lastname: Sadowski
mesh_terms: D000328:Adult; D000368:Aged; D004032:Diet; D004041:Dietary Fats / Q000008:administration & dosage; D004044:Dietary Proteins / Q000008:administration & dosage; D002149:Energy Intake; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010837:Vitamin K 1 / Q000008:administration & dosage* / Q000097:blood; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D004041:Dietary Fats; D004044:Dietary Proteins; D014859:Warfarin; D010837:Vitamin K 1