Creatine is synthesized mainly in the liver and kidneys. It is then transported to the muscles, where it is stored in the form of creatine phosphate (phosphocreatine). When your muscles need energy, creatine phosphate breaks down to release adenosine triphosphate (ATP), a molecule that supplies energy to the cells.
It therefore increases the energy available to you when your muscles contract. What's more, it increases strength during short, intense workouts and facilitates recovery, helping you to build muscle mass and volume.
Creatine comes in different forms: capsules, tablets, powder or liquid, to suit the preferences of every athlete.