Few people are aware of this simple fact but you should know that there are three forms of creatine available for buying: monohydrate, citrate and phosphate.
What you also need to understand is that phosphate creatine is not easy to absorb by one's body and is not so effective in bodybuilding, so there is a big chance you will not get the expected results.
With citrate creatine research is not conclusive although it does become more popular each day. Monohydrate creatine has been used in research in most cases and is the one that has the most proven results.
This is why, until further news, you should try and look for monohydrate creatine in my view!