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We read the article of Hocaoğlu-Emre et al (1) entitled ‘Vitamin D Deficiency and Insufficiency According to the Current Criteria for Children: Vitamin D Status of Elementary School Children in Turkey’ in the Journal of Clinical Research in Pediatric Endocrinology with great interest. In this study, the researchers investigated serum vitamin D levels in 640 healthy children between the ages of 6 and 9 years. It was stated that serum vitamin D levels of the subjects were obtained from the hospital records. They explained further that vitamin D levels were checked in healthy children by an “annual check-up for vitamin D status” at the hospital. The authors conclude that close follow-up of vitamin D status especially in the winter and post-winter period is necessary and that vitamin D supplementation be given for a strong bone structure and healthy growth (1).

Vitamin D Deficiency and Insufficiency According to Current Criteria for Children: Vitamin D Status of Elementary School Children in Turkey