Serum Levels of Vitamin D, Retinol and Zinc in Relation to overweight among Toddlers: Findings from a National Study in Iran.

Some studies have examined the association between micronutrient deficiencies and overweight in children, but data in this regard are conflicting. This study was done to investigate the association between serum levels of vitamin D, A and zinc with overweight in a large sample of Iranian toddlers.A total of 4261 toddlers, aged 15-23 months, who had an Iranian birth certificate and attended primary health care, were included in the current...