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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: Obesity (Silver Spring). 2019 May 16;27(8):1222–1224. doi: 10.1002/oby.22520

Figure 1.

Figure 1.

A) Increases in available calories in the US food supply since 1973 as a function of the protein fraction in the food supply (•) as reported by the food balance sheets published by the Food and Agriculture Organization of the United Nations (FAO) (http://www.fao.org/faostat/en/#data/FBS). The solid and dotted curves show the increase in energy intake associated with the decreased protein fraction of the food supply as predicted by the protein leverage model assuming perfect leverage (L=1) or modest leverage (L=0.5), respectively. B) Time course of the average adult energy intake changes as predicted by a validated mathematical model of human body weight dynamics (▪) to fully explain the observed average weight changes as well as the increases in energy intake predicted by the protein leverage model. C) Observed average adult weight changes (•) according to the National Health and Nutrition Examination Survey (NHANES) and the predicted weight changes due to the increasing energy intake according to the protein leverage model.