Is this the most-wanted cereal killer? An ex-FDA employee has revealed what he claims is the most harmful breakfast cereal on the US market. Dr. Darin Detwiler, who previously served as a food safety expert for the agency, told the Daily Mail that Kellogg’s Froot Loops is the worst of the bunch, pointing out that the rainbow rings are “heavily processed and contain high levels of added sugars, artificial dyes and preservatives, which are linked to health concerns.” Given the laundry list of bad-for-you ingredients in the bagged cereal, Detwiler says excess sugar is the least odious. A 1-cup serving...