Creatine is a substance produced by our body (mainly in the liver, kidneys, and pancreas) from three amino acids: glycine, arginine, and methionine. This substance is secreted into the bloodstream and distributed to the body's various cells. Due to its functions in the body, creatine is one of the most widely used supplements for athletes. In fact, it has been proven that consuming 3 grams of creatine improves physical performance in successive bouts of short, high-intensity exercise.