This document summarizes trends in dietary intake and physical activity in the US based on NHANES data from 1971-2010. It finds that from 1971-2000, calorie intake and carbohydrate intake increased for both men and women, while fat and saturated fat intake decreased. From 2000-2010, calorie intake decreased while carbohydrate intake decreased and fat, saturated fat, and protein intake increased. From 2007-2008 to 2009-2010, calorie intake decreased for both sexes, while carbohydrate intake decreased and protein intake patterns differed between men and women. Overall it shows changes in macronutrient distribution and energy intake over time in the US.