Creatine is not dangerous. The human body relies on creatine as one compound to supply energy to mucle and nerve cells. Without it, you would eventually be paralyzed, your heart muscles would stop working, your breathing muscles would fail, and you would die. Creatine is perhaps the most widely studied performance enhancement dietary supplement in history. Not one peer-reviewed, double-blind study has definatively shown creatine to be dangerous in healthy individuals. I say "healthy", because if you have a pre-existing kidney problem, it is probably unwise to consume anything that puts extra stress on the kidneys. However, creatine supplementation is perfectly safe in healthy individuals when taken in the recommended dosages , and is even now being actively prescribed by some physicians to treat a variety of neurological conditions such as Alzheimer's, etc. If creatine was dangerous, no one would eat red meat, because it contains significant levels of the compound.