Andro is one of a class of supplements known as prohormones. I've tried many "andros" in the past and pretty much agree with the majority of the board they suck. For the hell of it about three months ago I tried 1-AD by ergo and 1-Test by Sci fit my strength gains have been nothing short of incredible using only legal supps. Another good point to make is that the two prohormones above do not convert to estrogen, which was one of the major downfalls of the early prohormones.