Supplementing Creatine helps muscle cells produce more energy by increasing phosphocreatine stores within muscles. Phosphocreatine aids in the formation of adenosine triphosphate (ATP) , a key molecule the body's cells use for energy. The rate of ATP resynthesis limits your ability to continually perform at maximum intensity, as you use ATP faster than you reproduce it. Supplementing creatine allows the cells to produce more ATP energy to fuel muscles during high intensity exercise.Creatine is effective for adding muscle mass. Studies have shown it to alter numerous cellular pathways that lead to new muscle growth. It increases levels of insulin like growth factor IGF-1, a hormone that promotes increases in muscle mass. It has been shown to boost the formation of proteins that create new muscle fibers and adds water content to muscles, known as cell volumization to help grow muscle size.