Traditionally, the dried roots of the Andean maca are used in the treatment of male and female sterility. In addition, they are also used to treat male and female sexual dysfunction and states of fatigue and stress.
Traditionally, maca, also called Peruvian ginseng is used as a defenses stimulant, for chronic fatigue syndrome, memory improvement, menstrual disorders, symptoms associated with menopause and other reproductive and sexual disorders such as impotence and sexual dysfunction.
In human trials it has been known to lead to an increase in semen volume and sperm count per ejaculation, and motile sperm count after four months of administration.
As for sexual behavior, a 12-week human study found an improvement in sexual desire at 8 and 12 weeks after the initiation of treatment.