A loaf of sliced wheat bread is seen on the shelf at the Noe Valley Bakery and Bread Co. November 21, 2003 in San Francisco, California. The popularity of Atkins-style, low carbohydrate diets has contributed to the drop in consumption of bread in the U.S. over the past year as 40 percent of Americans ate less than in 2002. (Photo by Justin Sullivan/Getty Images)