Vitex Agnus Castus Herbal Supplement Non-Irradiated KosherChaste tree berries are often used as a female tonic. They benefit both the body and the mind through their balancing and normalizing properties, and they"re often used for support during change-of-life periods.Chaste"s benefits are normalizing and balancing. Chaste tree berries are primarily a tonic for the female reproductive system; they"re often used for monthly discomforts and through change-of-life periods.