If you or a loved one is battling cancer, I recommend getting acquainted with Dr. Thomas Seyfried's work yesterday.
"The higher the blood sugar, the faster the tumor grows. The lower the blood sugar, the slower the tumor grows...
...The strategy is not complicated. If the tumor cell needs fermentable fuel, then you take the fermentable fuel away, and you transition the body to a non-fermentable status (ketosis). You lower the blood sugar the tumor cells need, and you elevate ketone bodies, which the tumor cells can't use, but the normal cells can. The tumor needs fuel, it can't live without energy. When you take away that fuel, the tumor cells die."
TL;DR: Cut out the blood sugar-raising crap (i.e. go carnivore), and the cancer cells starve out. It's that simple; yet zero modern doctors understand this, because their entire Big Pharma-sponsored educational track kept these simple facts hidden to pad sick-care profits.