Adolph Coors Co. (RKY.N: Quote, Profile, Research) , the No. 3 U.S. brewer, said on Wednesday it was introducing a low carbohydrate beer to gain market share with health-conscious drinkers. The new beer, called Aspen Edge, is designed to compete with products such as rival Anheuser-Busch Cos. Inc.'s (BUD.N: Quote, Profile, Research) Michelob Ultra.