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Nutrition Journal
Published in: Nutrition Journal 1/2012

Open Access 01-12-2012 | Research

Tea and coffee consumption in relation to vitamin D and calcium levels in Saudi adolescents

Authors: Abdulaziz Al-Othman, Sara Al-Musharaf, Nasser M Al-Daghri, Sobhy Yakout, Khalid M Alkharfy, Yousef Al-Saleh, Omar S Al-Attas, Majed S Alokail, Osama Moharram, Shaun Sabico, Sudhesh Kumar, George P Chrousos

Published in: Nutrition Journal | Issue 1/2012

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Abstract

Background

Coffee and tea consumption was hypothesized to interact with variants of vitamin D-receptor polymorphisms, but limited evidence exists. Here we determine for the first time whether increased coffee and tea consumption affects circulating levels of 25-hydroxyvitamin D in a cohort of Saudi adolescents.

Methods

A total of 330 randomly selected Saudi adolescents were included. Anthropometrics were recorded and fasting blood samples were analyzed for routine analysis of fasting glucose, lipid levels, calcium, albumin and phosphorous. Frequency of coffee and tea intake was noted. 25-hydroxyvitamin D levels were measured using enzyme-linked immunosorbent assays.

Results

Improved lipid profiles were observed in both boys and girls, as demonstrated by increased levels of HDL-cholesterol, even after controlling for age and BMI, among those consuming 9–12 cups of coffee/week. Vitamin D levels were significantly highest among those consuming 9–12 cups of tea/week in all subjects (p-value 0.009) independent of age, gender, BMI, physical activity and sun exposure.

Conclusion

This study suggests a link between tea consumption and vitamin D levels in a cohort of Saudi adolescents, independent of age, BMI, gender, physical activity and sun exposure. These findings should be confirmed prospectively.
Appendix
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Metadata
Title
Tea and coffee consumption in relation to vitamin D and calcium levels in Saudi adolescents
Authors
Abdulaziz Al-Othman
Sara Al-Musharaf
Nasser M Al-Daghri
Sobhy Yakout
Khalid M Alkharfy
Yousef Al-Saleh
Omar S Al-Attas
Majed S Alokail
Osama Moharram
Shaun Sabico
Sudhesh Kumar
George P Chrousos
Publication date
01-12-2012
Publisher
BioMed Central
Published in
Nutrition Journal / Issue 1/2012
Electronic ISSN: 1475-2891
DOI
https://doi.org/10.1186/1475-2891-11-56

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