MuscleSport ExcelR8 Pro Series pre-workout is made up of two proprietary blends and one transparent ingredient. The list of features behind ExcelR8 includes 3.2g of beta-alanine, a 400mg mix of caffeine, infinergy, and synephrine, and a 2.375g blend of creatine HCl, creatine monohydrate, tauric acid, glycerol, and beet extract.