This report fills a request for a study of food deserts-areas with limited access to affordable and nutritious food-from the Food, Conservation, and Energy Act of 2008. The report summarizes findings of a national-level assessment of the extent and characteristics of food deserts, analysis of the consequences of food deserts, lessons learned from related Federal programs, and a discussion of policy options for alleviating the effects of food deserts. Overall, findings show that a small percentage of consumers are constrained in their ability to access affordable nutritious food because they live far from a supermarket or large grocery store and do not have easy access to transportation.

Results from reviewed studies indicate that for most participants in the Food Stamp Program-children, nonelderly men, and the elderly-use of food stamp benefits does not result in an increase in either Body Mass Index (BMI) or the likelihood of being overweight or obese. However, for nonelderly women, who account for 28 percent of the food stamp caseload, some evidence suggests that participation in the Food Stamp Program may increase BMI and the probability of obesity. Different results for age and sex subgroups remain unexplained. Further, because food stamp benefits are issued to households, not individuals, mixed results across age and sex subgroups make it difficult to target policy alternatives to address potential weight gain among some participants while not affecting others in the household.