“Never before have we had such a depth of understanding of how diet affects cancer both on a cellular level as well as a population level. Published data show that animal protein promotes the growth of tumors. Animal protein increases the levels of a hormone, IGF-1, which is a risk factor for cancer, and high-casein (the main protein of cow’s milk) diets allow more carcinogens into cells, which allow more dangerous carcinogen products to bind to DNA, which allow more mutagenic reactions that give rise to cancer cells, which allow more rapid growth of tumors once they are initially formed. Data show that a diet based on animal based foods increases a female’s production of reproductive hormones over her lifetime, which may lead to breast cancer. We now have a deep and broad range of evidence showing that a whole foods, plant-based diet is best for cancer.”

The China Study (p 348)
Professor T. Colin Campbell

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