This came up once before. It\'s not that I\'m saying androstenone has negative effects, it\'s that one study showed it to have negative effects (and in the article we cite that study). Actually, the co-authors included it with their input. However, this negative effect of androstenone does seem to correlate well with effects reported in other studies. For my purposes, androstenol has been shown to influence luteinizing hormone levels, and I believe that androsterone also will be shown to exert a positive influence on LH. Androstenone, on the other hand, should exert a negative effect; it\'s odor is described as urinous. I can\'t explain why so many folks on this Forum have reported positive effects of androstenone, but that\'s because no one knows yet what the complete story will be on human pheromones. Obviously, there\'s no one product that will work for everyone.