Dietary Reference Intakes The Essential Guide to Nutrient Requirements (2006) / Chapter Skim
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Pages 254-261
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From page 254... ...
TABLE 1 Dietary Reference Intakes for Vitamin K by Life Stage Group DRI values (mg /day) AIa ULb males females Life stage group 0 through 6 mo 2.0 2.0 7 through 12 mo 2.5 2.5 1 through 3 y 30 30 4 through 8 y 55 55 9 through 13 y 60 60 14 through 18 y 75 75 19 through 30 y 120 90 31 through 50 y 120 90 51 through 70 y 120 90 > 70 y 120 90 Pregnancy £ 18 y 75 19 through 50 y 90 Lactation £ 18 y 75 19 through 50 y 90 aAI = Adequate Intake.
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From page 255... ...
PART III: VITAMIN K 255 VITAMIN K V itamin K functions as a coenzyme for biological reactions involved in blood coagulation and bone metabolism. Phylloquinone, the plant form of vitamin K, is the major form in the diet.
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From page 256... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 256 loquinone is then secreted into the lymph and enters the circulation as a com ponent of chylomicrons. The circulating vitamin K is taken up by the liver and other tissues.
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From page 257... ...
PART III: VITAMIN K 257 intramuscularly or 2.0 mg orally within 6 hours of birth. This practice is supported by both U.S.
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From page 258... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 258 The hydrogenation of plant oils to form solid shortenings results in some conversion of phylloquinone to 2′,3′-dihydrophylloquinone. This form of vi tamin K is more prevalent in margarines, infant formulas, and processed foods, and it can represent a substantial portion of total vitamin K in some diets.
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From page 259... ...
PART III: VITAMIN K 259 TABLE 2 Potential Interactions with Other Dietary Substances Substance Potential Interaction Notes SUBSTANCES THAT AFFECT VITAMIN K Vitamin E Elevated intakes of vitamin E Increased intakes of vitamin E have not been reported may antagonize the action of to antagonize vitamin K status in healthy humans. vitamin K
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From page 260... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 260 min K activity with anticoagulation medications. A search of the literature re vealed no evidence of toxicity associated with the intake of either the phyllo quinone or the menaquinone forms of vitamin K
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From page 261... ...
PART III: VITAMIN K 261 KEY POINTS FOR VITAMIN K Vitamin K functions as a coenzyme for biological reactions 3 involved in blood coagulation and bone metabolism. Since data were insufficient to set an EAR and thus calculate 3 an RDA for vitamin K, an AI was instead developed.
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