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Vitamin K nutrition, metabolism, and requirements: current concepts and future research.
Adv Nutr 2012; 3(2):182-95AN

Abstract

In 2001, the US Food and Nutrition Board concluded that there were insufficient data with which to establish a RDA for vitamin K, in large part because of a lack of robust endpoints that reflected adequacy of intake. Knowledge of the relative bioavailability of multiple vitamin K forms was also poor. Since then, stable isotope methodologies have been applied to the assessment of the bioavailability of the major dietary form of vitamin K in its free state and when incorporated into a plant matrix. There is a need for stable isotope studies with enhanced sensitivity to expand knowledge of the bioavailability, absorption, disposition, and metabolism of different molecular forms of vitamin K. Another area for future research stems from evidence that common polymorphisms or haplotypes in certain key genes implicated in vitamin K metabolism might affect nutritional requirements. Thus far, much of this evidence is indirect via effects on warfarin dose requirements. In terms of clinical endpoints, vitamin K deficiency in early infancy continues to be a leading cause of intracranial bleeding even in developed countries and the reasons for its higher prevalence in certain Asian countries has not been solved. There is universal consensus for the need for vitamin K prophylaxis in newborns, but the effectiveness of any vitamin K prophylactic regimen needs to be based on sound nutritional principles. In contrast, there is still a lack of suitable biomarkers or clinical endpoints that can be used to determine vitamin K requirements among adults.

Authors+Show Affiliations

Haemostasis Research Unit, Centre for Haemostasis and Thrombosis, Guy's and St Thomas' NHS Foundation Trust, London, UK. martin.shearer@gstt.nhs.ukNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.
Review

Language

eng

PubMed ID

22516726

Citation

Shearer, Martin J., et al. "Vitamin K Nutrition, Metabolism, and Requirements: Current Concepts and Future Research." Advances in Nutrition (Bethesda, Md.), vol. 3, no. 2, 2012, pp. 182-95.
Shearer MJ, Fu X, Booth SL. Vitamin K nutrition, metabolism, and requirements: current concepts and future research. Adv Nutr. 2012;3(2):182-95.
Shearer, M. J., Fu, X., & Booth, S. L. (2012). Vitamin K nutrition, metabolism, and requirements: current concepts and future research. Advances in Nutrition (Bethesda, Md.), 3(2), pp. 182-95. doi:10.3945/an.111.001800.
Shearer MJ, Fu X, Booth SL. Vitamin K Nutrition, Metabolism, and Requirements: Current Concepts and Future Research. Adv Nutr. 2012 Mar 1;3(2):182-95. PubMed PMID: 22516726.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Vitamin K nutrition, metabolism, and requirements: current concepts and future research. AU - Shearer,Martin J, AU - Fu,Xueyan, AU - Booth,Sarah L, Y1 - 2012/03/01/ PY - 2012/4/21/entrez PY - 2012/4/21/pubmed PY - 2012/9/19/medline SP - 182 EP - 95 JF - Advances in nutrition (Bethesda, Md.) JO - Adv Nutr VL - 3 IS - 2 N2 - In 2001, the US Food and Nutrition Board concluded that there were insufficient data with which to establish a RDA for vitamin K, in large part because of a lack of robust endpoints that reflected adequacy of intake. Knowledge of the relative bioavailability of multiple vitamin K forms was also poor. Since then, stable isotope methodologies have been applied to the assessment of the bioavailability of the major dietary form of vitamin K in its free state and when incorporated into a plant matrix. There is a need for stable isotope studies with enhanced sensitivity to expand knowledge of the bioavailability, absorption, disposition, and metabolism of different molecular forms of vitamin K. Another area for future research stems from evidence that common polymorphisms or haplotypes in certain key genes implicated in vitamin K metabolism might affect nutritional requirements. Thus far, much of this evidence is indirect via effects on warfarin dose requirements. In terms of clinical endpoints, vitamin K deficiency in early infancy continues to be a leading cause of intracranial bleeding even in developed countries and the reasons for its higher prevalence in certain Asian countries has not been solved. There is universal consensus for the need for vitamin K prophylaxis in newborns, but the effectiveness of any vitamin K prophylactic regimen needs to be based on sound nutritional principles. In contrast, there is still a lack of suitable biomarkers or clinical endpoints that can be used to determine vitamin K requirements among adults. SN - 2156-5376 UR - https://www.unboundmedicine.com/medline/citation/22516726/full_citation L2 - https://academic.oup.com/advances/article-lookup/doi/10.3945/an.111.001800 DB - PRIME DP - Unbound Medicine ER -