Part 1: Vitex and Luteinizing Hormone - The Shocking Truth! When I was first learning about herbal medicine, I learned that Vitex, also known as Chaste Tree Berry, was very specific for helping to regulate irregular menstrual cycles. Since I had irregular cycles due to PCOS, this was very interesting information to me. PCOS is a condition I focus on in my clinical practice, and I have always considered Vitex a suitable herbal choice. But recently, I started to hear other expe