Fast food. It's cheap, convenient, and predatorily marketed to us when we're young in the hope that we'll be consumers for life. For many companies, that strategy has paid off: more than 1 in 3 American adults consume fast food on a given day, according to the CDC.
But there's a wrinkle in that math. If we eat too much of this stuff, that frequent consumer's lifespan could be a lot shorter than if he'd eaten more food unassociated with clowns, colonels, kings, and freckle-faced girls with red pigtails. Studies have found…