Author
BOOTH, SARAH L. - Jean Mayer Human Nutrition Research Center On Aging At Tufts University |
Submitted to: Food and Nutrition Research
Publication Type: Review Article Publication Acceptance Date: 11/1/2012 Publication Date: 1/1/2012 Citation: Booth, S. 2012. Vitamin K: food composition and dietary intakes. Food and Nutrition Research. 56:5505. Interpretive Summary: Technical Abstract: Vitamin K is present in the diet in the forms of phylloquinone and menaquinones. Phylloquinone, which is a major dietary source, is concentrated in leafy plants, and is the vitamin K form best characterized in terms of food composition and dietary intakes. In contrast, menaquinones are the product of bacterial production or conversion from dietary phylloquinone. Food composition databases are limited for menaquinones, and their presence in food varies by region. Dietary intakes of all forms of vitamin K vary widely among age groups and population subgroups. Similarly, the utilization of vitamin K from different forms and food sources appear to vary, although our understanding of vitamin K is still rudimentary in light of new developments regarding the menaquinones. |