This suggests that fat is probably not an initiator but a promoter of cancer. Studies of fat's suppressive effects on the immune system, as well as fat's ability to generate free radicals, support this interpretation. Eicosanoids Eicosanoids are hormone-like substances produced from the metabolism of arachidonic acid and other fatty acids. The human body produces a variety of eicosanoids that direct a diverse range of functions, including immune-cell activity, platelet aggregation, inflammation, steroid hormone production, gastrointestinal secretions, blood pressure, and pain sensation. In addition, they can significantly add to the risk of breast cancer, says cancer researcher Wayne Martin, of Fairhope, Alabama.
Sugar is remarkably effective at lowering the immune system's ability to work properly.
The immune-suppressive effect starts within 30 minutes after sugar ingestion and can last for up to five hours. 74 Excessive intake of iron Iron overload refers to an excess of body iron. A Danish study found that iron overload significantly raises the risk of developing cancer. Two other reports suggest that even moderately elevated iron accumulations in the body may increase cancer risk. 76 Much of the cancer in the U.S. population today may be related to overconsumption of red meat, a rich source of iron.