In this talk at CrossFit’s 2017 Health Conference, Australian orthopedic surgeon Dr. Gary Fettke presents a history of the junk science behind prevailing nutrition guidelines. Fettke has come under attack for his critique of the mainstream: Because of his dietary recommendations (“low-carb, healthy fat”), Fettke was reported to Australia’s medical board. But “the message is too important to be silenced,” Fettke states. “I feel that the combination of fructose, refined carbohydrate, and polyunsaturated oils is toxic, inflammatory, and at the root cause of all disease that we look at.”