High fructose corn syrup (HFCS) causes cancer in a unique way because much of it is contaminated with mercury due to the complex way it is made. High fructose corn syrup causes selenium deficiencies because the mercury in it binds with selenium, driving selenium levels downward. Selenium is crucial for glutathione production and its deficiency in soils tracks mathematically with cancer rates. Selenium and mercury are also eternal lovers having a strong affinity to bond with each other.
Already touched on briefly, excess sugar spikes insulin levels and insulin’s eventual depletion. High insulin and insulin-like growth factor (IGF-1) are needed for the control of blood sugar levels that result from chronic ingestion of high-carbohydrate meals (like the typical American diet, that is full of grains and sugars). Increased insulin levels are pro-inflammatory and pro-cancer and can directly promote tumor cell proliferation via the insulin/ IGF-1 signaling pathway.
Dr. Christine Horner has a lot to say to women about insulin and breast cancer:
When it comes to breast cancer, insulin is no friend. One of the biggest reasons is due to the fact that both normal breast cells and cancer cells have insulin receptors on them. When insulin attaches to its receptor, it has the same effect as when estrogen attaches to its receptor: it causes cells to start dividing. The higher your insulin levels are, the faster your breast cells will divide; the faster they divide, the higher your risk of breast cancer is and the faster any existing cancer cells will grow.
There’s also another detriment that high insulin levels can inflict. It makes more estrogen available to attach to the estrogen receptors in breast tissue. Insulin regulates how much of the estrogen in your blood is available to attach to estrogen receptors in your breast tissue. When estrogen travels in the blood, it either travels alone seeking an estrogen receptor, or it travels with a partner, a protein binder, that prevents it from attaching to an estrogen receptor. Insulin regulates the number of protein binders in the blood. So, the higher your insulin levels are, the fewer the number of protein binders there will be and therefore the more free estrogen that will be available to attach to estrogen receptors.
In other words, when your insulin levels are up, free-estrogen levels are up, and both of them speed up cell division. That’s why high insulin levels increase your risk of breast cancer so much. Eating sugar increases your risk of breast cancer in another way. It delivers a major blow to your immune system with the force of a prizefighter.
Dr. Horner talks about a study conducted by Harvard Medical School (2004) that found that women who, as teenagers, ate high-glycemic foods that increased their blood glucose levels had a higher incidence of breast cancer later in life. “So, encouraging your teenage daughter to cut back on sugar will help her to lower her risk of breast cancer for the rest of her life,” she said.