Here’s a clip from Zach Galifianakis’s visit to last night’s Conan, where he shares some of the secrets to his dieting success. Among the secrets not eating anything from the fast food companies that advertise during Conan as well as these handy tips: “Fast food you can’t do, you have to eat whole grains and that kind of stuff, and you have to cut out whipped cream pizzas.†Watch more from the interview below, where Galifianakis talks about his strict parenting style and the post-Between Two Ferns phone call he got from President Obama.