This may also explain why “intake of high-fat dairy, but not low-fat dairy, was related to a higher risk of mortality after breast cancer diagnosis.” If a protein in dairy, like casein, was the problem, skim milk might be even worse, but that wasn’t the case. It’s the saturated butterfat, perhaps because it triggered that cancer-spreading mechanism induced by CD36. Women who consumed one or more daily servings of high-fat dairy had about a 50 percent higher risk of dying from breast cancer.
We see the same with dairy and its relationship to prostate cancer survival. Researchers found that “drinking high-fat milk increased the risk of dying from prostate cancer by as much as 600% in patients with localized prostate cancer. Low-fat milk was not associated with such an increase in risk.” So, it seems to be the animal fat, rather than the animal protein, and these findings are consistent with analyses from the Health Professionals Follow-up Study (HPFS) and the Physicians’ Health Study (PHS), conducted by Harvard researchers.
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