22 Mar 2018 --- Kellogg’s has doubled the amount of vitamin D in many of its cereals to help tackle the chronic low levels of this essential vitamin in UK diets. The company’s cereals are to contain 50 percent of people’s daily vitamin D needs per bowl, the highest fortification level across the cereal category. Kellogg’s will roll out the cereals with 50 percent NRV vitamin D fortification across other European and Middle East markets simultaneously on the same brands as sold in the UK and Ireland, a spokesperson for the company tells NutritionInsight.