It’s fairly clear that creatine monohydrate causes weight gain. For many, this is a benefit. Unfortunately, some of this quick weight gain comes from water and reverses once supplementation stops. Still, creatine is a very common supplement used to gain strength and muscle mass. Does creatine actually increase muscle mass or is it all just temporary body weight?
There are fundamental problems with supplementing creatine in order to improve aerobic performance. While creatine definitely helps improve anaerobic performance, there is much less evidence to suggest it does the same in an aerobic environment.