Not especially, though a bad diet does mess with your immune system -- and type 2 diabetes has as many bad consequences as cigarette smoking. Best to avoid all the sugar-infused crap that Big Food stacks on the supermarket shelves, eat vegetables and a little protein.
Well all cells depend on blood sugar for energy. But your blood sugar levels still make no difference on the speed cancer cells grow.
Everything you do or eat, or don't do and don't eat, can give you cancer. I don't believe in any of it.
It wouldnt suprise me