Chasteberry
Chasteberry is the fruit of the chaste tree, a small shrub-like tree native to Central Asia and the Mediterranean region. The name is thought to come from a belief that the plant promoted chastity--it is reported that monks in the Middle Ages used chasteberry to decrease sexual desire.
Common Names -- chasteberry, chaste-tree berry, vitex, monk's pepper
Chasteberry has been used for thousands of years, mostly by women to ease menstrual problems and to stimulate the production of breast milk. chasteberry does so by helping the body increase its own natural levels of progesterone.