CHICAGO—Turkey sandwiches, long suspected of being a rich source of turkey sandwiches, were found to contain a substantial amount of turkey sandwich in every bite, the Food and Drug Administration reported Monday. "While traces of turkey sandwich can be found in other foods, such as turkey, bread, mayonnaise, or turkey-and-ham sandwiches, only turkey sandwiches contain 100 percent turkey sandwich," the report read in part. "In addition, eating a turkey sandwich a day is proven to help reduce the risk of not eating turkey sandwiches. This is great news for the 12 million Americans who aren't currently getting enough turkey sandwich." The report noted that turkey sandwiches are no longer considered to be a good source of hot dogs.