" Fed Up," a film that received a lot of attention at the Sundance Film Festival, focuses on the sugar industry and its effect on the health of Americans, and promises to change everything you thought you knew about food and exercise.

The film follows the lives of a group of children over the course of two years as they diet and exercise in an effort to become healthier.

"Fed Up" includes interviews with experts and some of the most powerful newsmakers in the nation, and examines the relationship between the food industry and the U.S. government.

It was executive produced by Laurie David, the Academy Award-winning producer of "An Inconvenient Truth," executive produced and narrated by veteran broadcast journalist and Yahoo's global anchor, Katie Couric, and directed by Stephanie Soechtig.

"Fed Up" opens in theaters nationwide on May 9.