Carl Pappenheim absolutely goes off on a graph he found on the back of a box of Cheerios, which purports to show you how Cheerios will stave off brain lesions. Or something.
I'm reminded of Bill Bryson's "Rated FIRST against the Ford El Crappo for safety!" diatribe on advertising - if a glucose drink is the only competition then Cheerios can't be doing too well against anything more sensible. But wait! Sugary energy drinks aren't the only competition! The other condition is.. no breakfast! Which actually beats Cheerios in the first half hour!
It just picks up speed from there. Check out the full fun.