Planetary Herbals Vitex (Chaste Tree Berry) Extract supports women's hormone regulation. Planetary Herbals Vitex Extract has become one of the most widely relied-upon botanicals in American and European herbalism. Planetary Herbals Vitex modifies the effect of the hypothalamus and pituitary glands. This helps regulate and balance female hormone production.The wisdom traditions of China, India, Europe and Native Americans have been explored to find botanicals that support all phases of a woman?s life. Formulations using the highest quality herbs in the world are gentle, natural, and effective. The botanical kingdom, however, is rich with herbal treasures to support healthy reproduction, healthy monthly cycles, and healthy transitions through menopause.