Food waste and economic waste on food is one of the most important challenges that people face today. No one should be starving but the foods we choose contribute to unsustainable standards for both our pocketbooks and our environment. Achieving more sustainable food budget needs to be driven by a mathematical approach. Biochemistry and nutrition should take a front seat to things like personal taste and social norms around eating.
The following shopping list is suitable for one person for one week who is of an average size or weight and activity level based on a caloric need of 2000 calories per day. While some are larger and some are more active perhaps this 2000 calorie limit will impose a reasonable level of caloric restriction to better manage your weight and health or will simply mean that you need to anticipate a slightly higher budget based on your inflexible caloric needs.