Kim and Khloe Kardashian shill for Quick Trim, a line of dietary supplements that claim to "Jump start your metabolism!" But American Dietetic Association spokesperson Keri M. Gans, MS, RD, author of The Small Change Diet (Gallery, 2011) promises that weight loss cannot be found in a pill. "People are always drawn to quick fixes--anything that doesn't require a lot of hard work on their end," she says. "They think they'll take these pills and look like the Kardashian sisters. But there's no research to support their use." Want to lose weight? Spend your time and money on items that will fuel your commitment and determination, like a fabulous gym outfit or a session with a trainer or registered dietician.