How does Creatine work?
Once creatine is absorbed into the muscle cell, it gets converted to creatine phosphate by an enzyme called creatine kinase. The process involves the addition of a high-energy phosphate group. To power muscle contraction the body uses ATP (adenosine triphosphate), a molecule with three high-energy phosphate bonds. When muscle contracts ATP loses a phosphate bond and it gets converted to ADP (adenosine diphosphate). When this happens, creatine phosphate donates its phosphate group to ADP, and with the help of another enzyme converts ADP back to ATP. This process of speeding up ATP regeneration is called the “creatine shuttle”.
