From what I understand, there is no truth in the statement that cancer feeds or causes prostate cancer. However, what sugar can do, depending on intake amount, cause other issues that will have a bearing on your overall health, which affects any number of health issues. I believe moderation is a good consideration in all that I do. Once diagnosed with advanced metastatic prostate cancer, I have repeatably found myself questioning what I want my "quality" life to be like. I restricted my intake of a lot of things, only to eventually consider that a bit of chocolate and sugar is not going to end my life tomorrow. With several life threatening issues, I now consider my quality of life to be first on my mind. The emotional side of issue is where I tend to struggle. One thing is for certain, you do get to decide what is best for YOU!