The new recommendation calls for everyone age one to 70 to take 600 IU of vitamin D a day, while those 71 and older should take 800 IU. At these intakes, 97.5 per cent of the population would have their needs for the nutrient met. The current guideline from Health Canada ranges from 200 IU to 600 IU, depending on age, although breastfed babies need 400 IU daily, a level the panel continues to endorse.