“…Vitamin D fortification varies widely between countries, as detailed in the section on Food fortification with vitamin D. These drawbacks may explain the wide variability between countries and the lack of a consistent pattern by age. The mean vitamin D intake ranged between 1 and 4 µg/ day, with some exceptions in selected groups of children, adolescents and pregnant women, probably due to vitamin D supplements (126,164,165,166,167,168,169,170,171,172,173,174,175,176). These intakes are well below the RDA of 10-20 µg/day, depending on age and reproductive stage (2,177).…”