What are bioidentical hormones and how do they work in your body? OB-GYN physician Dr. Christiane Northrup answers all your questions about bioidentical hormones in this video. She explains why hormones such as Premarin are not good for you, and she gives you a list of biodentical hormones that are safe and effective. Dr. Northrup also explains how plant-based- hormones can support your body. If you want to take hormones, learn which ones your body recognizes so that you get the benefits without the risks associated with chemically – derived hormones.