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. 2010 Dec;49(8):473-81.
doi: 10.1007/s00394-010-0106-y. Epub 2010 Apr 13.

Dietary B Vitamin Intakes and Urinary Total Arsenic Concentration in the Health Effects of Arsenic Longitudinal Study (HEALS) Cohort, Bangladesh

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Free PMC article

Dietary B Vitamin Intakes and Urinary Total Arsenic Concentration in the Health Effects of Arsenic Longitudinal Study (HEALS) Cohort, Bangladesh

Maria Argos et al. Eur J Nutr. .
Free PMC article

Abstract

Purpose: The objective of this analysis was to evaluate the effects of dietary B vitamin intakes on creatinine-adjusted urinary total arsenic concentration among individuals participating in the Health Effects of Arsenic Longitudinal Study (HEALS) cohort in Araihazar, Bangladesh. Arsenic exposure is a major public health problem in Bangladesh, where nearly 77 million people have been chronically exposed to arsenic through the consumption of naturally contaminated groundwater. Dietary factors influencing the metabolism of ingested arsenic may potentially be important modifiers of the health effects of arsenic in this population.

Methods: Daily average B vitamin intakes from a validated food frequency questionnaire and laboratory data on drinking water and urinary arsenic concentrations among 9,833 HEALS cohort participants were utilized. Statistical analyses were conducted using generalized estimating equations incorporating knotted spline linear regression.

Results: Increasing dietary intakes of thiamin, niacin, pantothenic acid, and pyridoxine were found to significantly increase urinary total arsenic excretion, adjusted for daily arsenic intake from drinking water and other potential confounders.

Conclusions: These results suggest that higher intakes of certain B vitamins may enhance the excretion of arsenic from the body. This study offers new insights into modifiable dietary factors that relate to arsenic excretion and thus provides potential avenues for the prevention of arsenic-related health effects.

Figures

Fig. 1
Fig. 1
Scatterplot of logarithms of creatinine-adjusted urinary total arsenic versus daily arsenic intake with individual values plotted as gray points and cubic smoothing spline indicated in black line. The vertical lines at −2 and +2 indicate location of knots for linear spline regression model used in subsequent analyses

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