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Παρασκευή 9 Φεβρουαρίου 2018

Efficacy of Different Modes of Vitamin D Supplementation Strategies in Saudi Adolescents

Publication date: Available online 9 February 2018
Source:The Journal of Steroid Biochemistry and Molecular Biology
Author(s): Nasser M. Al-Daghri, Mohammed Ghouse Ahmed Ansari, Shaun Sabico, Yousef Al-Saleh, Naji J. Aljohani, Hanan Alfawaz, Mohammed Alharbi, Abdulaziz M. Al-Othman, Majed S. Alokail, Sunil J. Wimalawansa
Vitamin D deficiency is rampant in the Middle East, even in children and adolescents. This study was designed to investigate the effects of different vitamin D repletion strategies commonly used on serum vitamin D levels of Saudi adolescents. Study design: A 6-month multi-center, controlled, clinical study, involving 34 schools in the central region of Riyadh, Saudi Arabia. Different strategies of vitamin D supplementation were tested (200 ml fortified milk of different brands or vitamin D tablet (1,000IU). Anthropometrics were taken and fasting blood samples withdrawn at baseline and after intervention for the quantification of serum glucose, lipid profile and 25(OH) vitamin D. A significant increase in 25(OH)D level was observed in subjects supplemented with vitamin D tablet, milk brand 2 and milk brand 4, whereas subjects supplied with fortified milk brands 1 and 3 respectively, exhibited a significant decrease in 25(OH)D levels. Analysis of covariance showed that after adjusting for baseline 25(OH)D, age, gender and BMI, the mean 25(OH)D levels of children who were taking vitamin D tablet (9.1±0.8nmol/l) and milk brand 4 were significantly higher (7.3±1.1nmol/l) than children taking milk brand 2 (1.6±1.0nmol/l). Subjects supplied with milk brands 1 and 2 exhibited a significant increase in total cholesterol level, while it dropped significantly in subjects taking milk brand 3, while no changes were observed in other groups. Different strategies in vitamin D supplementation used in this clinical study elicited varying degrees of improvement in serum 25(OH)D level. The observed outcomes were dependent on the strategy and gender in the Saudi adolescent population, with oral tablet supplementation being favored in boys.



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