A teenager died recently after taking the "One Chip Challenge," eating Paqui's uber-spicy tortilla chip and going as long as possible without eating or drinking anything else. The cause of death remains unclear. But there's an interesting lesson here about the uselessness of "non-GMO" food labels. Actress Jessica Biel sells all-natural Tylenol—which is identical to plain ole' Tylenol. Another case of dubious health marketing? Yep.