A vegan diet treats colon cancer

In this short and powerful testimony Chris Ward shares his story of how he refused chemotherapy and cured himself with a raw vegan diet.
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Colon cancer arises from polyps—35 percent of people consuming the typical Western diet are found to have colon polyps. Meat, fat, and the lack of fruits, vegetables, and dietary fiber are the primary causes of polyps and subsequent colon cancer.
http://pcrm.org/kickstartHome/celebrity/mcdougall/index.cfm
Quote: John A. McDougall, M.D., is a physician and nutrition expert
A vegan diet is best for our physical health ( See the research in http://www.adelicatebalance.com.au/ ) and our spiritual health, see World Peace Diet by Will Tuttle  (see this lecture: http://www.youtube.com/watch?v=SvZpF1R6GUo and www.worldpeacediet.org)
Please consider this:
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Gary Francione: I mean that our thinking about animals is very confused. On one hand, we claim to regard animals as members of the moral community. We claim to embrace a moral and legal obligation not to inflict “unnecessary” suffering or death on animals. We can, of course, debate the meaning of “necessity,” but whatever it means, it must rule out suffering and death imposed for reasons of human pleasure, amusement, or convenience. If it does not do so, then the exception would completely swallow the moral rule.
The problem is that 99.99% of our animal use cannot be justified by anything but human pleasure, amusement, or convenience. For example, we kill more than 12 billion land animals every year in the United States alone for food. No one maintains that it is necessary to eat animals to lead an optimally healthy lifestyle and an increasing number of mainstream health care professionals tell us that animal foods are detrimental to our health. Animal agriculture is a disaster for the environment because it involves a most inefficient use of natural resources and creates water pollution, soil erosion, and greenhouse gasses. The only justification that we have for the pain, suffering, and death that we impose on these billions of animals is that we enjoy eating animal foods, or that it is convenient to do so, or that it is just plain habit.
We regard some animals—our “pets”—as members of our families. We see them as nonhuman persons. We love them and they love us back. We are not in any way speaking or thinking anthropomorphically when we say that dogs and cats are sentient beings with distinct personalities. That is simply a matter of fact. We have no doubt that they have an interest in avoiding pain, suffering, and death. We grieve when they die. But our dogs and cats are no different from the animals whose bodies we eat or who are used to produce dairy and eggs. We love some animals; we stick forks into others. That is what I mean by “moral schizophrenia.”"
http://cup.columbia.edu/static/interview-gary-francione