Jennifer Aniston is sharing a story about a time she ate a Big Mac at McDonald’s, saying it did not agree with her and further proving her point that eating healthy is the way to go.

In a Q&A with New York Mag about skincare and beauty, the former Friends star was asked if she had ever been in a situation where she had to eat fast food, and she said yes.

“I'll never forget when Justin and I were on a road trip and we were so hungry. The only thing around was McDonald's. I think I ordered a Big Mac. Wow, my body did not react well to that! It was like putting gasoline in a purified system,” she explained. “I am always trying to eat organic and natural foods, so that just made my stomach turn and made me feel terrible. And I think what you put in your body, as well as stress, is reflected in the quality of your skin.”

USA Today notes Aniston is the spokesperson for SmartWater and urges her friends to “hydrate, hydrate, hydrate!” She is also a self-professed yogi and promotes clean diets and exercise.

image: NBC