Relationships between carbohydrate, protein and energy consumption and the obesity prevalence in the US. A: The trends in the per capita carbohydrate consumption (Ref. ) and the obesity prevalence (Ref. ). Lag-regression result of the relationship between the per capita carbohydrate consumption in 1961-1994 and the obesity prevalence in 1971-2004 is given in the panel. CHO = carbohydrate. B: The trends in grain and sugar contribution to total carbohydrate (Ref. ). C and D: The relationships between grain and sugar contribution to daily per capita carbohydrate consumption and the obesity prevalence. E and F: respectively showing that the per capita protein and energy consumption increased in parallel with the obesity prevalence with a one-year lag. The one-year lag-regression result is presented in each panel.