Agnus Castus has a long tradition of use as a general 'balancer' for the female hormones. It has been used since the 6th century BC. Despite its common name, Chaste Tree, Agnus Castus is actually a shrub that grows in the Mediterranean.
Agnus Castus has been subjected to studies for its use in treating Premenstrual Syndrome (PMS) as well as acne.