Katherine Streeter for NPR
Maria Fabrizio for NPR

Woman weighing herself. ImageZoo/Corbis hide caption

itoggle caption ImageZoo/Corbis

Sure, these Buffalo-chicken-and-kale-stuffed mushrooms look tasty, but they aren't the giant bowl of salt and corn syrup your brain really, really wants. Matthew Mead/AP hide caption

itoggle caption Matthew Mead/AP

Belviq, a weight-loss drug from Arena Pharmaceuticals, was approved by the Food and Drug Administration in 2012. With the agency's approval of Saxenda in December, there are four new weight-loss pills available. Arena Pharmaceuticals Inc/Reuters/Landov hide caption

itoggle caption Arena Pharmaceuticals Inc/Reuters/Landov

Even versions of Zi Xiu Tang Bee Pollen labeled "genuine" and "anti-counterfeit" have been found to contain the drug sibutramine, which was supposed to come off the U.S. market in 2010 for safety reasons. Food and Drug Administration hide caption

itoggle caption Food and Drug Administration

Photos from Liz Paul's blog entries on Prior Fat Girl. The blog chronicles women's weight loss journeys. Courtesy of Liz Paul/PriorFatGirl.com hide caption

itoggle caption Courtesy of Liz Paul/PriorFatGirl.com

Carlos Romero and girlfriend Kate Rowe sit down for a meal they cooked together. Two years ago, Carlos Romero weighed 437 pounds. Mike Kane for NPR hide caption

itoggle caption Mike Kane for NPR