Documentarian Morgan Spurlock, best known for the 2004 film Supersize Me, died Thursday at the age of 53.

Spurlock had been battling cancer, according to his family. He was a former smoker who quit before he embarked on his one-month binge of purely McDonald’s meals for three meals, which he turned into a movie. At the time, the fast food chain had the option to “supersize” any meal into its largest possible size, which Spurlock accepted whenever asked. His documentary eventually led to the end of the practice and an Oscar nod.