Also known as chaste treeuses premenstrual syndrome pms period pain teenage acnedescription this herb has a long tradition of use as a general balancer for the female hormones despite its common name chaste tree agnus castus is actually a shrub found in the mediterranean the fruit of the plant is used in phytotherapy and gives off a pleasant peppermintlike smellhow it works agnus castus acts on the pituitary gland to increase the secretion of luteinising hormone which leads to an increase