He says the CIA has shown up at his door with questions. Colleagues have warned him not to pursue his controversial research findings. One of his professional organizations considered kicking him out because of his research, and national panels that once wooed him now ignore him.
But in the end, T. Colin Campbell is a consummate researcher. When his findings belied one of his own foundational beliefs about nutrition, Campbell found himself standing alone at a crossroads: continue a respected and tenured academic career at a prestigious school or go public and advocate for scientific findings that counter established tenets of nutrition, contradict government dietary guidelines, are misunderstood by the medical establishment and belie the marketing claims of major food corporations.
Campbell says he chose the truth. In response to a comment that he picked a fight with a billion-dollar industry, Campbell said, “No, it’s a trillion-dollar industry.”
The professor emeritus in nutritional biochemistry at Cornell University said research has proven that consumption of animal products, including meat, fish and dairy, triggers chronic diseases and impaired health and poses a greater risk than heredity or environment. He has linked casein, a protein in milk, with breast cancer. His lifelong professional focus has been cancer and nutrition, and Campbell says that our national and global fight with cancer has targeted the wrong enemy.
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Though he is scholarly and genteel, Campbell is not reserved. He’s impatient and blunt. He dismisses the Atkins diet, Paleo diet, South Beach diet and high protein diet. He’s not a supporter of celebrity physicians who prescribe diets of wild salmon, expensive grass-fed beef and costly nutritional supplements. He comes down firmly on the side of health for everyone, not just the wealthy who can afford pharmaceutical supplements of questionable health benefit and expensive prescription medications for blood pressure, cholesterol and diabetes.
Campbell advocates disease prevention at the end of a fork. He was prominently featured in the award-winning documentary Forks Over Knives, and is the focus of a new documentary Plant Pure Nation, due out in early 2015 and produced by his son Nelson+ Campbell.
Colin Campbell discounts physicians as reliable sources of nutritional advice for their patients. Physicians, he said, received minimal to no nutritional education in medical school and have not generally conducted investigative laboratory research themselves.
Campbell, however, has spent more than five decades in laboratory research, much of it publicly funded. He’s adamant the public has a right to know his results.
“Diet can be used to prevent and reverse cancer just like it prevents and reverses heart disease,” he said. “A diet high in animal protein increases the amount of carcinogens going to the cells. It increases the enzyme MFO (mixed function oxidase) that causes increased carcinogenic activity.”
In the lab, Campbell has shown that increasing consumption of animal protein alters MFO and activates cancer while decreasing consumption detoxifies cancer. A high protein diet derived from animal products increases cell replication and increases oxygen free radicals associated with cancer and aging.
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“High-protein bars are crazy,” Campbell said. “Plants alone can easily provide all the protein we need.”
By demeanor and upbringing, Campbell is an unlikely warrior. He grew up on a dairy farm in Virginia convinced of the nutritional value of milk. Early in his academic career as one of the youngest tenured professors at Cornell University, Campbell was researching dietary protein among children in the Philippines and was surprised to see a high correlation between consumption of animal protein and liver cancer. He was further surprised when he read an obscure research paper published by scientists in India linking dairy protein with cancer.
“This was counter to everything we believed,” he said.
The work started a line of inquiry that amassed the scientific foundation for what Campbell calls a “whole-food, plant-based diet: whole foods, no processed foods, only plants, no meat, fish or dairy and no added oils.” He wrote about the diet and his epidemiological studies in his book The China Study. The book, written with his son Thomas Campbell, was published in 2005 and was expected to have a limited audience. It has now sold over a million copies and been translated into 25 languages. Campbell’s sequel, Whole: Rethinking the Science of Nutrition, came out in 2013 and is a New York Times bestseller.
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