You Are What You Eat is a British dieting programme presented by Trisha Goddard and Amir Khan that broadcasts on Channel 5. The show was originally broadcast on Channel 4, before moving to Channel 5 in 2022 for its revived series. Both the Channel 4 and Channel 5 versions of the show were produced by CPL Productions (formerly Celador).The show originally ran from 2004 until 2006 on Channel 4 with controversial host Gillian McKeith. On 5 March 2021 it was confirmed the show would be revived with Goddard and Khan replacing McKeith as host, with the first episode of the new series broadcast back-to-back on Channel 5 with Dr Amir's How To Give Up Sugar (and Lose Weight) (also known as Dr Amir's Sugar Crash) on 5 January 2022.

You Are What You Eat was also the title of an American film from 1968. The phrase "You are what you eat" was first expressed by Ludwig Feuerbach in 1863 (German: Der Mensch ist, was er iszt.).