Some foods and dietary patterns have been linked to an increased risk of various cancers. A direct link between unhealthy diet and lifestyles to cancer risk has been shown, and research on this subject continues. Diet serves as a contributor to the onset of cancer in about 30-35% of cases, yet isolated nutrients play a smaller role than overall dietary patterns. The available data is inconsis-tent for many foods, which further clouds the issue. This course reviews some of the more recent studies assessing diet and how it pertains to the elevated risk of developing cancer as well as prevention.