Xenadrine, quite frankly, is one of the most recognizable fat burner brand names in history (only Muscle Tech's Hydroxycut supercedes it, in my opinion). It has taken several forms over the last several years—the original ephedra-based Xenadrine RFA-1, and the ephedra-free Xenadrine EFX.

I was just over at BodyBuilding.com checking out some of the more popular fat burners when I came across Species Nutrition's Lipolyze. Apparently, it's one of the top selling "stimulant free products." However, that's not really why I decided to review it.