Creatine Fuel (Stack) Twinlab's Creatine Fuel Stack is an advanced performance promoter containing pure Creatine Monohydrate, an energy producing substance for optimal performance, and cell-volumizing amino acids glutamine and taurine.* Result - Creatine may improve muscle strength, performance and lean mass.* Science - research suggests that Creatine users had a significant increase in peak power output, mean body mass and muscular performance.* Depletion of phosphocreatine can result in muscular fatigue and fading muscle power. Each specially formulated Creatine Fuel Stack capsule contains pure creatine monohydrate synergistically combined with cell-volumizing amino acids glutamine and taurine, the two most abundant free amino acids in muscle tissue. Creatine plays an important role in the transfer of energy.* In the muscle, it is used to fuel the process of contraction. It is converted to phosphocreatine, which is important for short energy bursts such as sprinting and weightlifting. Depletion of phosphocreatine can result in muscular fatigue and fading muscle power.