Nutrition surveys indicate that gluten-free diets are often low in fiber and micronutrients, particularly B vitamins and certain minerals. GlutenAssure Multivitamin is specially formulated with higher levels of key B vitamins, as well as magnesium, calcium, zinc and selenium. This multivitamin also includes the scientifically researched prolyl-endopeptidase enzyme targeting gluten breakdown. Research suggests that individuals following a gluten-free diet are exposed to an average of 150 to 400 mg of gluten daily.