Cancer and Omega-6 Fatty Acids
Mr. Ip’s earliest paper, published in Cancer Research in 1985, examined the effects of various combinations of corn oil and coconut oil in the diets of rats fed a cancer-causing chemical. Coconut oil is rich in saturated fat while corn oil contains high levels of linoleate—linoleic acid—an omega-6 polyunsaturated fatty acid and the major type of fat molecule in industrial seed oils. The diets contained different levels of linoleate: 0.5, 1.1, 1.7, 2.2, 3.5, 4.4, 8.5, and 11.5 percent by weight, with total fat at 20 percent by weight.Mr. Ip and his co-authors found that “Mammary tumorigenesis was very sensitive to linoleate intake and increased proportionately in the range of 0.5 to 4.4% of dietary linoleate.” The most severe growth and proliferation of tumors occurred when intake of omega-6 was around 4 percent of the diet by weight (about 2.5 ounces or 5 tablespoons in a typical American diet of 4 pounds of food per day), but even at .5 percent (.3 ounces or about 2 teaspoons), dietary linoleate provoked the growth of tumors. (Linoleate content above 4.4 percent by weight of the diet produced no proportionate increase.)
“High-fat, linoleic acid-rich diets promote chemically induced rat mammary carcinogenesis, virally induced mouse mammary tumor development, and the growth and metastasis of estrogen-independent human breast cancer cells in athymic nude mice. In contrast, saturated fatty acids have no discernible effects on mammary carcinogenesis or progression.”One study Mr. Rose cited (published 1979 in the journal Lipids) specifically showed that saturated fats caused no significant increase in tumor formation compared with that seen in rats fed a diet containing a mere 0.5 percent of corn oil. Mr. Rose summarized his review of over one hundred studies as follows:
“... when a high-fat (20% by wt) diet was provided in the form of corn oil or sunflower rich in [linoleate], there was a pronounced enhancement of mammary tumor development in rats exposed to DMBA [a carcinogen]. In contrast, equivalent total fat intake in the form of saturated fatty acid-containing coconut oil, butter or tallow produced no significant increase in tumor formation compared with that seen in rats fed an 0.5%-corn oil diet. These observations have been confirmed and extended by many investigators.”Let that sink in. Science shows that omega-6 fatty acids—the kind the diet-dictocrats are encouraging us to eat—the kind that has flooded the food supply since the Second World War, encourage the growth of cancer, while butter, coconut oil, and tallow—the kind of fats that government officials warn against—does not support the growth of cancer. In other words, these saturated fats are protective.
Conjugated Linoleic Acid–Protection Against Cancer
In response to the Rose study, Mr. Ip published a follow-up review on the effects of trans fatty acids (the kind of fats in margarine), oleic acid (the kind of fat in olive oil and in various proportions in lard, tallow, and butter), omega-3 polyunsaturated fatty acids (the kind found mostly in fish and fish liver oils, and also in small amounts in eggs, organ meats and animal fats), and a type of fat molecule called conjugated linoleic acid (CLA).He found little evidence that oleic acid or omega-3 fatty acids provide protection against cancer and, surprisingly, that industrially created trans fats did not promote cancer. But what he did find was that CLA, even in very small amounts (less than 1 percent of the diet) provided significant protection against cancer whatever the mix of other fatty acids in the diet.
Dietary Selenium Reported to Protect Against Prostate and Breast Cancers
In 2009, our friend Clement was named principal investigator of a $5.4 million grant from the National Institutes of Health to study the role of finasteride and selenium in preventing prostate cancer. Finasteride (brand name Propecia) is a drug used to treat male pattern baldness and has since been approved to treat men with prostate cancer. In several papers, Mr. Ip reported that dietary selenium on its own provided protection against cancers of both the prostate and the breast.Withholding Vital Information—Ignorance or Criminal Negligence?
Today we’re seeing a profusion of advertising for cancer centers where balded children are forced into chemotherapy while their parents anguish on the sidelines. What kind of dietary advice do these families receive in these centers? Are they told about the research indicating that grass-fed butter will help prevent their kids’ cancers from growing and spreading, and even recurring? Are they encouraged to eat foods rich in selenium?No, they are not. The fact that what science has discovered about cancer protection is not shared with these families—indeed not with any cancer patients undergoing chemotherapy—constitutes a crime of immense proportions. Please don’t tell me that our medical system is based on science. Yes, we have made tremendous strides in the technologies of surgery, but when it comes to the knowledge we need to recover and stay healthy, that remains buried in the obscure papers of Mr. Ip and his colleagues.







