Maca is an herbal medicine that comes from Peru. It has been used for centuries as a food by the natie peoples. Maca is now used to change hormone levels during menopause, help with stress and to control irregular menstrual (period of bleeding). It is also used to balance adrenal glad hormones. Maca is also used for men with Erectile Dysfunctions. Other names for Maca include: Lepidium peruvianum and Roayal Maca. Check with your doctor before using Maca.