Hi Rebecca, me again, hope you don't think I'm being a pain but I've just been doing some research on what Femerelle contains. It appears to be made up of plant oestrogens or phytoestrogens as they are also called. I asked my oncologist about soy isoflavone supplements, which are also phytoestrogens, and was advised not to take them. At out recent BCC 'Moving Forward' course, the medical herbalist who came to talk about diet and nutrition also advised us that having plant oestrogens from natural food sources was okay but to stay away from them as supplements as they were in a much too concentrated form for us since our diagnosis. Your oncologist may have a different view but please check with them before you take anything. Take care Pat x