SugarMama - The study was based on rural populations in China, but they also took the theories they got from that and did lab work on rats. Before and after exposing them to carcinogens they altered the amount of casein (milk protein) in their diet. At every point from the cancer "taking" to how it developed, the casein acted like a light switch... 20% casein = "on" (cancer started or progressed), 5% casein = "off" (cancer didn't start or stopped progressing). Notice that it wasn't 0%... see if you can wean yourself down to 5% of your diet being from dairy.
Critical - have you tried plant protein like soy and tempeh? The Eat to Live diet isn't entirely vegan... 10% of your diet can come from eggs, fish, nonfat dairy.
I think any improvement you make in your diet is helpful, so only do what works for you. I just found out last night that a friend who survived breast cancer shortly after me has been re-diagnosed with only months to live. I also am overweight, take blood pressure meds, recently dodged a high-blood sugar bullet, have a family history of alzheimers... all illnesses this diet claims to prevent/cure. I'm going whole hog and not feeling a bit deprived.