General Mills introduced its oat-based, ready-to-eat cold cereal as CheeriOats but, in 1946, changed its name to Cheerios because of a trademark dispute with Quaker Oats. Today, it comes in nearly a dozen different flavors and is marketed to children as well as adults. It has used several different characters in its advertising over the years, including Charlie Brown from Peanuts. Why did the US Food and Drug Administration call Cheerios an "unapproved new drug" in 2009?
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