As some people are aware, you can now find creatine on the market in three forms: phosphate, citrate, and monohydrate. My feeling is that the phosphate variety is not easily absorbed by the body and for this reason will not yield effective and substantial results. The citrate variety seemed to be catching on for a time, but again the research is sketchy here. In fact, nearly all the positive clinical studies that have been done on creatine have utilized the monohydrate form, and this is the only form that I currently recommend.