Ben Greenfield followed a 12-week carnivore diet including organ meats, meats, fish, some berries, honey, and root tubers, but no vegetables, bread, or grains.

“this was between the time that I interviewed you at my house and the time that I went to the Swiss clinic I did 12 weeks relatively strict carnivore you know I've talked about this before but I you know I threw in some berries some honey a little bit of root tuber like like cellular carbohydrates you know things along those lines but no no vegetables no no bread no grains just mostly you know organ meats meats fish etc”