"Chasteberry, the fruit of the deciduous chaste tree, has been used throughout Mediterranean nations for thousands of years. Nature's Plus Herbal Actives Chasteberry fruit extract is uniformly standardized to a minimum of 0.5% (750 mcg) agnuside and 0.6% (900 mcg) aucubin to guarantee that each and every capsule provides consistent potency and activity. Each capsule, providing the greatest concentration of active botanical principles, maximizes the synergistic benefits of the whole fruit, which naturally contains aromatic oils, iridoid glycosides, monoterpenes (agnuside, aucubin and eurostosid) and flavonoids (casticin and vitexin). "