The researchers also showed that the amount of beef tallow in the mouse diet did not affect human breast tumor growth rate, whereas increasing amounts of corn oil promoted tumor growth. These results indicate that there is no benefit to reducing beef tallow intake, but as increase in corn oil may be unhealthy. In a third study, researchers at MSU looked at CLA's effect on skin tumors in mice. This may be important to counteract a lifetime accumulation of cancer promoters. These studies show that CLA in meat inhibits some types of cancer.
Scientists are unsure if it inhibits all cancers.
Overall effects of dietary carcinogens and anticarcinogens is unknown. H.A.J. Schut, Ph.D., Medical College of Ohio. Influence of Meat Fatty Acids on Human Immune Cell Function and Tumor Growth. E.A. Repasky, Ph.D., Health Research, Inc., Roswell Park Cancer Institute Division. Dietary Conjugated Dienoic Linoleate Modulation of Skin Tumor Promotion in Mice.