60
Views
93
CrossRef citations to date
0
Altmetric
Research Article

Nutritional Intake of Vitamins K1 (Phylloquinone) and K2 (Menaquinone) in The Netherlands

, , , , , & show all
Pages 115-122 | Published online: 13 Jul 2009
 

Abstract

Vitamin K plays a key role in the hepatic synthesis of blood clotting factors. Recently, other tissues (bone, vessel wall) were shown to produce vitamin K-dependent proteins not involved in blood coagulation. Multiple forms of vitamin K have been found in human food: phylloquinone (K1) and various menaquinones. A recommended dietary allowance (RDA) has only been defined for K1, and its value is exclusively based on blood clotting data. We have prepared a provisional table of menaquinones in food, which has been used to calculate the total vitamin K intake in a well-defined cohort of the Dutch population. It is concluded that K1 is the major form of nutritional vitamin K, that total vitamin K intake is higher than in other populations described and that the correlation between vitamin K intake and serum concentration is poor. It is suggested that present RDA values be reconsidered and intakes comparable with those in the highest quartile of our study population are recommended.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.