Capacity of the US Food System to Accommodate Improved Diet Quality: A Biophysical Model Projecting to 2030

Current Developments in Nutrition
Zach ConradLisa Jahns

Abstract

Increasing Americans' diet quality will require changes to the food supply. Due to the complex nature of the food system, this is not as straightforward as simply increasing the production of healthy foods and decreasing the production of unhealthy foods. Little is known about whether the US food system can produce enough food, given finite agricultural resources, to support shifts toward healthier eating patterns. The aim of this study was to model the capacity of the US food system to accommodate a shift toward a healthier diet by 2030. A biophysical simulation model estimated the proportion of the US population that could be fed a given diet based on food system constraints, currently and projected to 2030. The model accepted data inputs on food intake, crop yields, and population size. Linear and nonlinear regression models were used to estimate projected food intake and crop yields based on recent historical data (1980-2014). Diet quality was estimated using the Healthy Eating Index-2015. The US agricultural system can produce enough food to feed 146% of the population by 2030. A greater proportion of the population can be fed a high-quality diet than a low-quality diet (178% compared to 119%). To accommodate increased die...Continue Reading

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