I'm on tamoxifen and have been for 8 months now. I have had a variety of side effects, but am now learning how to deal with them. My question is soy? Has anyone's doctor told them not to eat soy? Soy in some ways mimicks estrogen. I was wondering because I love to eat edamame (soy beans) and haven't had any since I was diagnosed. Being that we are all supposed to be eating 5 fruits and vegetables a day, I'd like to know, since this would be an easy one for me.