One of the hallmarks of cancer is that cancer cells have impaired metabolism. It was found in the 1920’s, by nobel laureate Dr. Otto Warburg, that caner cells are in a state of aerobic glycolysis. This has become known as the “Warburg effect”. What this means is that cancer cells do not use glucose, one of the forms of cellular energy, the same way as normal cells. Cancer cells use this fuel source inefficiently and in doing so this is what allows them to grow quickly, invade and metastasize. It is even hypothesized that cancer develops due to damaged mitochondria which are the energy producing organelles in our cells. This is the reason you may have heard that cancer cells cannot function without glucose. While this is not completely true it has been found that affecting cancer cell metabolism may reduce the growth and spread of cancer cells.