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YouTube™ is considered a convenient and popular platform to seek healthcare information, which is uploaded by people of various professions. This study aimed to assess the content and quality of the YouTube videos containing information about vitamin D for children. A YouTube search was performed using the terms ‘vitamin D for children’ and ‘vitamin D deficiency in children’. Two independent reviewers scored the videos with the use of a customized 11-point scoring scheme and the 5-point Global Quality Scale (GQS) to assess the content an