Maca has a long-held folk reputation as a powerful aphrodisiac, but do human studies bear out these results?
A possible answer to that question lies with work carried out at an Italian hospital in 2009. Two-and-a-half grams of Maca extract was given daily to twenty-five men diagnosed with erectile dysfunction, while a equally large group of men with the same medical problem received a placebo. Three months out no improvement was noted among those dosed with the placebo. whereas the subjects getting the Maca reported more frequency and satisfaction in their sex lives.