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Department of Clinical Nutrition, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
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the impact of irregular supply of vitamin D ( 11 ). A further hydroxylation in the kidney to 1,25-dihydroxyvitamin D (1,25OH 2 D) is tightly controlled by the endocrine system and varies little with 25OHD status, until reaching clear deficiency. In a