The prevalence of childhood and adolescent obesity has increased during the past decades. A high body mass index (BMI) is associated with a low vitamin D status. The purpose of this study was to determine the prevalence of vitamin D deficiency and insufficiency in Norwegian children and adolescents with excess body weight.
Vitamin D status and seasonal variations of 25(OH)D and 1,25(OH)(2)D were analyzed in 102 children and adolescents (70 girls and 32 boys), 8-19 yr of age, with overweight and obesity.
Overall, 50% of the children and adolescents included in the study had a low vitamin D status (25(OH)D