Lindsey Bahr
April 09, 2014 AT 06:36 PM EDT

Forget everything you know about obesity.

In a new trailer for the documentary Fed Up, experts line up to expose the insidious lies and misinformation about why our waistlines continue to expand. Katie Couric executive produced (along with Laurie David) and narrates the doc, which premiered at the 2014 Sundance Film Festival.

Check it out after the jump. It might make you think twice about what you just had for lunch.

Fed Up is set to hit theaters on May 9.

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