A food desert is an area that has limited access to affordable and nutritious food. In contrast, an area with greater access to supermarkets and vegetable shops with fresh foods may be called a food oasis. The designation considers the type and the quality of food available to the population, in addition to the accessibility of the food through the size and the proximity of the food stores.
In 2017, the United States Department of Agriculture reported that 39.5 million people or 12.8% of the population were living in low-income and low-access areas. Of this number, 19 million people live in "food deserts", low-income census tracts that are more than one mile from a supermarket in urban or suburban areas and more than 10 miles from a supermarket in rural areas.
Food deserts tend to be inhabited by low-income residents with inadequate access to transportation, which makes them less attractive markets for large supermarket chains. These areas lack suppliers of fresh foods, such as meats, fruits, and vegetables. Instead, available foods are likely to be processed and high in sugar and fats, which are known contributors to obesity in the United States.
However, a number of studies suggest that poor health in "food deserts" is primarily caused by differences in demand for healthy food, rather than differences in availability.
History
By 1973, the term "desert" was ascribed to suburban areas lacking amenities important for community development. A report by Cummins and Macintyre states that a resident of public housing in western Scotland supposedly coined the more specific phrase "food desert" in the early 1990s. The phrase was first officially used in a 1995 document from a policy working group on the Low Income Project Team of the UK's Nutrition Task Force.
Initial research was narrowed to the impact of retail migration from the urban center. More recent studies explored the impact of food deserts in other geographic areas (such as rural and frontier) and among specific populations like minorities and the elderly. The studies addressed the relationships between the quality (access and availability) of retail food environments, the price of food, and obesity. Environmental factors can also contribute to people's eating behaviors. Research conducted with variations in methods draws a more complete perspective of "multilevel influences of the retail food environment on eating behaviors (and risk of obesity)."
Advocates within the Food Justice movement have identified that terms like "Food Desert" undermines how the intersections of race and class largely influences minority communities' inaccessibility to fresh foods. To better describe what is taking place, activists such as Karen Washington have begun to use the term "food apartheid." The activist and community organizer Karen Washington describes the term as "[looking] at the whole food system, along with race, geography, faith, and economics." As a result, there has been a paradigm shift within the movement with community organizers encouraging members of affected neighborhoods to consider how inadequate food systems correlate with the intersectionality of race and class. The Planting Seeds Just Tour serves as an example, as it visited solution based projects to resist injustices with ecological wisdom and food justice that were run by women of color. The tour also highlighted economically viable alternatives to provide healthy food and created spaces in which community members could participate in conversations regarding sustainability.
Definitions
Researchers employ a variety of methods to assess food deserts including directories and census data, focus groups, food store assessments, food use inventories, geographic information system (GIS), interviews, questionnaires and surveys measuring consumers' food access perceptions. Differences in the definition of a food desert vary according to the following: The type of area, urban or rural Economic barriers and affordability of accessing nutritious foods, including the cost of transportation, price of foods, and incomes of those in the area The distance to the nearest supermarket or grocery store number of supermarkets in the given area type of foods offered, whether it be fresh or prepared nutritional values of the foods offered
The multitude of definitions, varying by country, has fueled controversy over the existence of food deserts.
It should also be noted that because it is too costly to survey the types of foods and prices offered in every store, researchers use the availability of supermarkets and large grocery stores (including discount and supercenter stores) as a proxy for the availability of affordable nutritious food.