By Angela Haupt and Kurtis Hiatt, U.S. News
The Food Pyramid falls, Weight Watchers rises, and other major diet news. A roundup.
Another year has passed and we still don't fully understand what happens when we eat -- why we gain or lose weight, which foods should be embraced or cast aside, how nutrients are absorbed. But that just makes researchers even hungrier to find out. This past year, scientists explored everything from the effect of diet on heart health to the link between particular foods and fatness.
From their work, U.S. News has selected the following eight as the standouts in the diet news of 2011.