Casein it turns out is what his experiments showed to be the culprit in fueling cancers in rats. I saw a more recent interview where he admits that it's not meat in itself but the particular protein that is mainly in dairy products. It's the stuff used to glue labels on beer bottles, it's really tenacious. In fact when it's in your arteries it takes a long time to go away. That is definitely not a good protein for you as his test show, but meat in itself isn't horrible as I also thought myself. After being vegan/vegetarian I had to go back to meat.