Cancer is often caused by the environment – and what we eat is the number one way we are exposed to the environment. In this full-length fascinating presentation, Dr. Campbell recounts his unexpected discovery that animal protein – promotes cancer. Dr. Campbell describes how he was able in multiple experiments to turn cancer “on” and “off” by manipulating the amount of animal protein in the diet. This is the background that led to Campbell’s famous China Study, and his bestseller by the same name.