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Serum 25-hydroxyvitamin D (25OHD) is the main circulating form of vitamin D in the blood. Vitamin D status in adults is determined by numerous factors such as oral intake, skin generation, and body composition. However, there is limited understanding regarding determinants of 25OHD in young children. The aim of this study was to identify modifiable factors that may act as determinants of 25OHD at five years of age. Analysis conducted on 79 children from the ROLO Kids study. Dietary intakes and dietary habits were measured using a food frequency questionnaire and levels of sun exposure were assessed using a lifestyle questionnaire, both completed by the mother. Child weight, height, and skinfolds were measured. Vitamin D status was sufficient (25OHD > 50 nmol/L) in 61% of the participants. Neither reported dietary vitamin D nor calcium intake was significantly associated with 25OHD. Intakes of …