Macro partitioning

Reduction in industrially produced trans fat intake was the primary driver of improved dietary quality in the US adult population between 1999 and 2010, accounting for more than half of the total improvement.

While you should still aim to eat more fruits, vegetables, and whole grains, the single most impactful dietary change for public health in the US context has been the elimination of trans fats, largely achieved through food industry reformulation rather than individual choice. Focus on reading labels for 'partially hydrogenated oils' and supporting policies that limit these fats, as this structural change has driven the biggest improvements in dietary quality.