Anyway, here is a video outlining new research into this same topic:
The research is reported here and the full article is available here
Cancer cells tend to take up more glucose than healthy cells, and researchers are increasingly interested in exploiting this tendency with drugs that target cancer cells' altered metabolism.
Cancer cells' sugar cravings arise partly because they turn off their mitochondria, power sources that burn glucose efficiently, in favor of a more inefficient mode of using glucose. They benefit because the byproducts can be used as building blocks for fast-growing cells.
Drugs or diet, if this knowledge can help find a solution to cancer then that is good.