True. But the issue of animal protein and cancer growth is not simply one of correlation. I spent several years reviewing the laboratory data, animal studies, epidemiological evidence, and clinical trials in humans (in addition to interviewing researchers from all over the world) before I came to this conclusion and wrote WHAT THE EXPERTS SAY ABOUT FOOD AND CANCER. Animal protein is the ONLY macronutrient that increases IGF-1 levels significantly, and I suggest you read up on the influence of IGF-1 on cancer growth before you comment further. If you chose not to or don't believe me, go to http://www.nutritionfacts.org (Dr. Michael Grieger's website) and see his take on it. In the meantime, I would say that ANYONE that has a cancer that is made worse by growth factors like IGF-1 should avoid animal protein entirely and get their protein from plant sources.
