I think I remembed reading something about this in the The Schwarzbein Principle. I may be wrong, it's been a long time. But I do know that I read somewhere that low-carbing starves cancer cells. Although, from this article, it looks like it would be necessary to go very low carb, like induction, to get it to work.

As far as that suit goes, the woman who died from cancer may not have stayed as low-carb as necessary to help fight her cancer. There's also the possiblity it was just too far along when she started treatment.