The caveat is finding a high-quality supply of creatine. So many on-line reviews for once great brands of creatine powder talk about how those brands recently switched to a new supplier, how the consistency changed to that of powdered sugar, and how all of a sudden they were getting major gastrointestinal problems from a brand that used to be good.

It's hard to know where to go for the right kind of supplement. I've taken it as an exercise supplement in the past with no seeming downsides, but in a few hours search, I couldn't find a supply that doesn't have dozens to hundreds of these complaints against it.