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

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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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Official URL: http://dx.doi.org/10.1186/1475-2891-11-56

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
Faculty of Medicine > Warwick Medical School

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

Official Date:

August 2012

Dates:

Date	Event
August 2012	Published

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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