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Pep was a brand of whole-wheat breakfast cereal produced by the Kellogg Company, and introduced in 1923, which became the first to be fortified with vitamins B and D in 1938.[1] Pep was a long-running rival to Wheaties, and also the sponsor of Mutual Radio's The Adventures of Superman radio series.[2] One of Pep's advertising slogans was "the Sunshine cereal".
Pep became one of the first "fortified" cereals, with an infusion of vitamins, beginning in the 1930s. Extensive advertising, from print advertisements to sponsorship of The Adventures of Superman and the television and radio shows of Tom Corbett—Space Cadet helped keep the brand in the public's (particularly children's) consciousness. Pep was included in "variety packs" of serving-sized boxes of Kellogg's cereals. The cereal's "mildly laxative" property was routinely mentioned in print ads.[3] Pep faded from popularity as public tastes changed, and the brand was discontinued in the late 1970s.[4]