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Osteoporos Int. 2006;17(8):1122-32. Epub 2006 May 9.

No effect of vitamin K1 intake on bone mineral density and fracture risk in perimenopausal women.

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  • 1Department of Endocrinology and Metabolism C, Aarhus Sygehus, Aarhus University Hospital, Tage-Hansens Gade 2, Aarhus C, 8000, Denmark. rejnmark@post6.tele.dk

Abstract

INTRODUCTION:

Vitamin K functions as a co-factor in the post-translational carboxylation of several bone proteins, including osteocalcin.

AIM:

The aim of this study was to investigate the relationship between vitamin K(1) intake and bone mineral density (BMD) and fracture risk in a perimenopausal Danish population.

DESIGN:

The study was performed within the Danish Osteoporosis Prevention Study (DOPS), including a population-based cohort of 2,016 perimenopausal women. During the study approximately 50% of the women received hormone replacement therapy (HRT). Associations between vitamin K(1) intake and BMD were assessed at baseline and after 5-years of follow-up (cross-sectional design). Moreover, associations between vitamin K(1) intake and 5-year and 10-year changes in BMD were studied (follow-up design). Finally, fracture risk was assessed in relation to vitamin K(1) intake (nested case-control design).

RESULTS:

In our cohort, dietary vitamin K(1) intake (60 mug/day) was close to the daily intake recommended by the Food and Agriculture Organization (FAO). Cross-sectional and longitudinal analyses showed no associations between intake of vitamin K(1) and BMD of the femoral neck or lumbar spine. Neither did BMD differ between those 5% that had the highest vitamin K(1) intake and those 5% that had the lowest. During the 10-years of follow-up, 360 subjects sustained a fracture (cases). In a comparison between the cases and 1,440 controls, logistic regression analyses revealed no difference in vitamin K(1) intake between cases and controls.

CONCLUSION:

In a group of perimenopausal and early postmenopausal women, vitamin K(1) intake was not associated with effects on BMD or fracture risk.

PMID:
16683180
[PubMed - indexed for MEDLINE]
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