The correlations between the grain contribution and consumption and the obesity prevalence in US adults. A: The trends in the grain contribution to niacin (Ref. ) and the obesity prevalence (Ref. ). B: The 10-year lag-regression plot using the data in A. C and D show the similar correlations in both sexes. E: The trends in the yearly grain consumption (Ref. ) and the obesity prevalence (Ref. ). The 10-year lag regression result is presented in each panel. F: The lag-regression plot of the obesity prevalence in 1988-2004 against the per capita grain consumption in 1978-1994 using the data in E.