Morgan Spurlock uses common documentary techniques such as a narrator, script, and interviews to present his argument in Supersize Me that fast food is unhealthy. As the narrator, he directly addresses the audience to explain how eating only McDonald's food for a month affected his health. The script outlines arguments that fast food can cause obesity and that fast food companies are responsible for rising obesity rates. Spurlock interviews doctors, the Surgeon General, customers, and fast food employees to support his position and give his views more validity.