As you draft your argument, make sure to support your claims with specific evidence: facts, examples, and other evidence from your research. Harba, for example, uses factual evidence to make the point that the typical American diet is damaging.

Michael Pollan, who has written extensively about Americans’ unhealthy eating habits, cites the Centers for Disease Control in arguing that “fully three quarters of US health care spending goes to treat chronic diseases, most of which are preventable and linked to diet: heart disease, stroke, type 2 diabetes, and at least a third of all cancers.”