Al-Othman, Abdulaziz, Al-Musharaf, Sara, Al-Daghri, Nasser M., Yakout, Sobhy M., Alkharfy, Khalid M., Al-Saleh, Yousef, Al-Attas, Omar S., Alokail, Majed S., Moharram, Osama, Sabico, Shaun, Kumar, Sudhesh and Chrousos, George P.. (2012) Tea and coffee consumption in relation to vitamin D and calcium levels in Saudi adolescents. Nutrition Journal, Vol.11 (No.1). Article number 56. ISSN 1475-2891

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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.

Item Type:	Journal Article
Subjects:	Q Science > QP Physiology R Medicine > RA Public aspects of medicine
Divisions:	Faculty of Medicine > Warwick Medical School > Health Sciences
Library of Congress Subject Headings (LCSH):	Coffee -- Health aspects, Tea -- Health aspects, Vitamin D in human nutrition, Teenagers -- Saudi Arabia -- Health and hygiene
Journal or Publication Title:	Nutrition Journal
Publisher:	BioMed Central Ltd.
ISSN:	1475-2891
Date:	August 2012
Volume:	Vol.11
Number:	No.1
Page Range:	Article number 56
Identification Number:	10.1186/1475-2891-11-56
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/52155

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