Super Size Me is a 2004 American documentary film directed by and starring Morgan Spurlock, an American independent filmmaker. Spurlock's film follows a 30-day period from February 1 to March 2, 2003 during which he ate only McDonald's food. The film documents this lifestyle's drastic effect on Spurlock's physical and psychological well-being, and explores the fast food industry's corporate influence, including how it encourages poor nutrition for its own profit.
Spurlock ate at McDonald's restaurants three times per day, eating every item on the chain's menu at least once. Spurlock consumed an average of 20.92 megajoules or 5,000 kcal (the equivalent of 9.26 Big Macs) per day during the experiment. As a result, the then-32-year-old Spurlock gained 24½ lbs. (11.1 kg), a 13% body mass increase, a cholesterol level of 230, and experienced mood swings, sexual dysfunction, and fat accumulation in his liver. It took Spurlock fourteen months to lose the weight gained from his experiment using a vegan diet supervised by his future wife, a chef who specializes in gourmet vegan dishes.