The Know-It-All author A.J. Jacobs weighs in with the answer. "It breaks down into carbon dioxide and water," A.J. says. "The carbon dioxide you breathe out and the water you either sweat out or you pee out."
The fat cells stay in your body, he says. "They just get thinner. They're just waiting for more fat to come in. They're very sneaky."
All of us experience things that completely hit the reset button on our lives. For Nate Berkus, it was surviving the 2004 tsunami that took the life of his partner, photographer Fernando Bengoechea. Here, the designer shares some of the lessons he learned about hanging on and moving forward.