"... we were finding that high protein intake, in excess of the amount needed for growth, promotes cancer. Like flipping a light switch on and off, we could control cancer promotion merely by changing levels of protein..He was criticized for not discussing aspects of cow's milk and other animal foods which could confound the relationship between animal protein and cancer. I recently saw an article by Campbell addressing this concern:
The effects of protein feeding on tumor development were nothing less than spectacular. ... [In one experiment] all animals that were administered [the carcinogen] aflatoxin and fed the regular 20% levels of casein [a cow's milk protein] either were dead or near death from liver tumors at 100 weeks. All animals administered the same level of aflatoxin but fed the low 5% protein diet were alive, active and thrifty, with sleek hair coats at 100 weeks. This was a virtual 100 to 0 score, something almost never seen in research."
I would never have dreamed that our results up to this point would be so incredibly consistent, biologically plausible and statistically significant.
Let there be no doubt: cows milk protein is an exceptionally potent cancer promoter."
"The adverse effects of animal protein, as illustrated in our laboratory by the effects of casein, are related to their amino acid composition, not to the effects of pasteurization, homogenization, or of the presence of hormones, pesticides, etc. Even though pasteurization and homogenization may cause slight changes in the physical characteristics of proteins, I know of no evidence where amino acid contents are altered by these treatments. This is important because it shows that there will be no difference in the biological effects of animal based protein from grass-fed or feed lot fed animals. Moreover, the casein that we used in our extensive experiments was before hormones were introduced and before factory farming became the norm, thus it mostly represented animals that were grass fed."Here's Campbell talking about protein, why we associate protein with animal foods, and the danger of consuming too much:
- Grass-Fed Animal Agriculture, T. Colin Campbell Foundation
A problem with eating a low-carb diet is that, by default, it has you eating more fat and protein. As we saw in my previous post, dietary fat can predispose someone to insulin resistance and diabetes. Here we see that animal protein can predispose one to cancer.
The alternative to eating a low-carb diet is eating a relatively high-carb diet ... but have those carbs be minimally processed, plant-derived, with very little added fat.