I am 20 plus years survivor of breast cancer, DCIS. I had a lumpectomy and radiation and chose not to do the tamoxifen. Your decision depends on you and your family, along with your oncologist input and type of cancer you had. When I had cancer i had to come to terms with the fact that it was my decision and not someone else's on how it is treated. The other disappointment I had and still do to some extent is the lack of connection with the naturopaths and medical teams and dietitians when it comes to these decisions. I made the right decisions for the times but if it were today, I might think twice about radiation for what I had, and would include a vegetarian or vegan diet and use only natural personal care products as my road to good health. The only side effect I had (that I know of) with radiation therapy was a terrible skin rash on my breast that the radiologist said was not caused by radiation, but I got another opinion from a dermatologist and she said it definitely was. It was treated with cortisone and did not return. I did use supplements during radiation and went about my daily life and work. Again, this is such a personal decision that may not be best for you.