""[I]n many ways, the breakfast is the most important meal of the day, because it is the meal that gets the day started," Lenna F. Cooper, B.S., writes in a 1917 issue of Good Health, the self-proclaimed "oldest health magazine in the world" edited by none other than Dr. John Harvey Kellogg, the co-inventor of flaked cereal. "It should not be eaten hurriedly, and all the family, so far as possible, should partake of it together. And above all, it should be made up of easily digested foods, and balanced in such a way that the various food elements are present in the right proportions. It should not be a heavy meal, consisting of over five to seven hundred calories," Cooper's article continues.

Granted, Kellogg did hold an M.D. degree, but there's no denying he had a product to sell."

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