One of the less salutary effects of going off to college is the Freshman 15. You've probably heard — and maybe seen, over Thanksgiving — that the average first-year college student gains 15 pounds, thanks to unlimited food at the cafeteria plus unbridled snacking.

Your college freshman, all grownup and independent, may not be willing to listen to your parental cautions about eating right. But maybe she'll listen to another freshman?