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A total of 108 children aged 30–72 months with vitamin D deficiency were studied in a randomized single-blind clinical trial. The deficient children were assigned to three groups, namely, vitamin D-fortified biscuit (BG), capsule vitamin D (CG), and ampoule vitamin D (AG). Capsules and biscuits containing 50,000 IU of cholecalciferol were consumed twice per week for 3 consecutive weeks. Ampoules with 300,000 IU of cholecalciferol were injected intramuscularly in a single dose. Three weeks after treatment, serum 25(OH)D concentrations were measured, and the three groups were compared.