Chasteberry

Chasteberry (Latin name Vitex Agnus-Castus) is used to ease symptoms of premenstrual syndrome (PMS) as well as to regulate menstruation. Though it contains no hormones, it appears that chasteberry can affect hormonal activity by stimulating the pituitary gland to decrease production of prolactin, a hormone involved in milk production. The reduction in prolactin can help to alleviate breast tenderness and other discomforts associated with PMS.