It has exploded in popularity over the last couple years, but creatine has been around for several years now. It is legal in both Canada and the US, but many people believe it will soon be illegal too.
Creatine increases energy and improves performance for in certain sports.
In the same case as Androstenedione, creatine has not been around for very long, so the long term effects are still unknown. Long term effects will have to be found but simply waiting and seeing what happens in the future. Creatine is also produced in the body naturally, because of this, one of the long term side effects is believe to be that the body will stop producing creatine naturally and supplemented creatine will be needed. If the body stops producing creatine and creatine is not taken orally, researchers believe muscle will eventually turn to fat. There have been improvements in knee extensions, bench press, cycle sprints, running sprints, and jumping.