Move over, peanuts: Milk allergy more common in kids, study says Milk is the most common food allergy for children under 5, but a new study says many cases are not diagnosed and parents are unprepared. By Avichai Scher Peanuts get a lot of attention, but the most common food allergy for kids under 5? Milk. In a study released on Friday, researchers found that milk allergy affects over Keep Reading >>