Katherine Reeves examines weight loss as a means of cancer prevention. Empirical evidence that weight loss can reduce cancer risk is lacking, in part because it is difficult to identify cohorts of adults who can lose weight and maintain the weight loss. Reeves suggests that the emergence of Bariatric surgery provides options for achieving and maintaining weight loss among morbidly obese adults. Therefore, studying this population provides an opportunity for a natural experiment to evaluate if weight loss can reduce cancer risk. Reeves will be preparing a grant application titled “Cancer Incidence Following Weight Loss Surgery” to the National Cancer Institute to evaluate if bariatric surgery can reduce cancer risk using data obtained through the Cancer Research Network (CRN). Reeves’ intended benefit of this research is to promote the health of American families, many of which are touched by obesity, cancer, or both.