In 2004, Health Canada reaffirmed its population health policy that all breastfed, healthy term infants in Canada receive a daily vitamin D3 supplement of 400 IU (5). This policy recommendation was made in consultation with the Canadian Expert Advisory Committee on Dietary Reference Intakes (DRI). They determined that the 1997 DRI value for vitamin D of 200 IU was too low for Canadians based on Canadian studies (6, 7) and surveillance systems (1) that indicated a high rate of vitamin D deficiency and vitamin D deficient rickets continued in Canada.