Jimmy Kimmel Asks Gluten-Free People What Gluten Is — And Hilariously, They Have No Idea In places like NYC and LA that go nuts for the latest diet crazes, being gluten-free is a growing trend — and Jimmy Kimmel has stepped in to poke some fun at all the people jumping on the bandwagon. The market for gluten-free products grew 44% between 2011 and 2013, and is projected to continue to rise, reaching sales of $15.6 billion by 2016. ...