Once upon a time, Jennifer Anniston ate a Big Mac . . . and she hated it.

The 43 year-old actress has been praised for her healthy and clean eating. She told New York Magazine that one time she was on the road with Justin Theroux and there was nothing around except for McDonalds. The actress ordered what she remembers to be a Big Mac and claims the experience was like “putting gasoline in a purified system.” As someone who is constantly eating clean, organic food, putting the greasy burger into her system made her feel “terrible.”

Jennifer Anniston’s healthy body has been the talk of many magazines that have been dying to know her diet habits. She told Celebrity Workout that she credits most of that to her loyal yoga practices, but she also gave the website some of her tips on eating right and fast food certainly is not on the list. Her personal chef, Jewels Elmore even wrote her own cookbook titled The Family Chef: Make Your Kitchen the Heart of Your Family.