A line of whole-grain breads fortified with vitamin D, folic acid, and fiber was recently launched in United States groceries by Sara Lee Bakery Group, Inc., St. Louis, Mo., a leading producer of packaged bakery products in fresh, refrigerated, and frozen bakery segments. Marketed under the name Earth Grains Extra Fiber, the breads were developed to provide a source of important nutrients that Americans are underconsuming, while delivering a good taste. Three varieties are available: 100% Whole …