In the 1930s Otto Warburg demonstrated that cancer cells revert from using oxygen for cellular energy to utilization of sugar. This discovery won Warburg the Nobel Prize in Medicine. Now, eight decades later, after vitamin C therapy was thoroughly discredited by modern medicine even though Linus Pauling and Ewan Cameron produced 22% 1-year survival utilizing oral and intravenous vitamin C versus 0.4% with conventional care, researchers show vitamin C blocks the Warburg effect, in particular in colon cancer cells. Vitamin C works by inhibition of a glucose transporter (GLUT-1). Now cancer researchers propose vitamin C therapy combined with conventional chemotherapy. [Oncotarget June 15, 2016] Don’t hold your breath over vitamin C therapy entering the cancer clinic any time soon though.