Americans are “poisoning” themselves, says John Mackey, the co-chief executive officer of healthy food grocery Whole Foods Markets.

Never one to mince words, Mackey talked openly about jerks in leadership roles and took Americans to task for their toxic eating habits and their “workaholic” culture when he sat down with CEO Guru host Steve Tappin. But Mackey is on a mission to change those habits, starting with his own company.

Click “play” on the arrow above to learn how Mackey puts his corporate muscle behind correcting some of the workplace’s biggest drains, including obesity, “assholes” in upper management and meetings that drag… and drag… and drag.