If you wish to build muscle you need to just take both. I just take 6g of creatine and 1/2 of a gram of L-Glutamine before I exercise. Creatine provides you with the energy you'll want to workout harder and go longer. L-Glutamine can help with muscle tissue repair and recovery. If you are going to do a strength training exercise you want to just take a lot of carbs and twitter.com protein...