The Food Plans represent a nutritious diet at four different cost levels. The nutritional bases of the Food Plans are the 1997-2005 Dietary Reference Intakes, 2005 Dietary Guidelines for Americans, and 2005 MyPyramid food intake recommendations. In addition to cost, differences among plans are in specific foods and quantities of foods. Another basis of the Food Plans is that all meals and snacks are prepared at home. For specific foods and quantities of foods in the Food Plans, see Thrifty Food Plan, 2006 (2007) and The Low-Cost, Moderate-Cost, and Liberal Food Plans, 2007 (2007). All four Food Plans are based on 2001-02 data and updated to current dollars by using the Consumer Price Index for specific food items.
When people make decisions about what to eat, they may consider such factors as taste, ease of preparation, nutrition, what others enjoy eating, and price. Many researchers seek to understand what makes some people choose healthful diets while others choose less healthful diets. To conduct these studies, researchers must understand as much of the context of the decisions as possible: What foods are normally enjoyed by an individual and his or her co-diners? How much time does an individual or household have to prepare food? Are there health conditions or other factors that might prompt an individual to value health and nutrition more so than others do? What are an individual’s or household’s budget restrictions?