2.0 BACKGROUND 2.1 Recommendations for Intakes of Vitamin D for Infants The AI value of at least 200 IU/d was derived from the amount of breast milk typically consumed by infants and the concentration of vitamin D in breast milk that resulted in serum 25(OH)D concentrations above 27.5 nmol/L (1). The current recommendations for vitamin D intake in Canada for infants are listed below, but no dosage has been evaluated using dose-response studies conducted in Canada.