My 55 year old friend died of metastatic breast cancer that went to the brain. Her oncologist told her not to eat any sugar because it feeds cancer. She complied and perhaps lived longer...but sadly did eventually die...
This TED Talk by Dr William Li on Angiogenesis, Can We Starve Cancer is very informative concerning the relationship between what we eat and cancer. https://www.ted.com/talks/william_li?language=en