Documentary filmmaker Morgan Spurlock first shot to national attention with his 2004 film Super Size Me. He ate nothing but McDonald’s food and chronicled his ill health during that time. Spurlock and his film became a cultural phenomenon. He received the Best Director award at Sundance and was nominated for an Academy award. But what if McDonald’s wasn’t the real problem with his health? Each day during his month-long experiment, he ate all his meals only at McDonald’s, and he ate large servings by any restaurant’s standards. No one forced him. By the experiment’s end, he reported experiencing shakes (as...