Posted 20 March 2006 - 10:18 PM
Xylitol And Insulin Resistance, Diabetes Hypertension, And Hormonal Imbalances
Consuming sugar and other refined carbohydrates results in the rapid release of glucose, or blood sugar. In response, the pancreas secretes insulin to usher glucose into the cells, where it is burned for energy. Excess glucose stresses the system, and over time the cells become less responsive to insulin. This condition, known as insulin resistance, is a huge health problem and it is estimated to affect half the American population. Insulin resistance is associated with abnormalities in cholesterol and triglyceride levels, hypertension, increased risk of heart disease, and diabetes.
The dramatic rise in type-2 diabetes since the mid-1900s directly coincides with our increased consumption of sugar. One long-term study of more than 65,000 women demonstrated that a high-sugar, low-fibre diet increased the risk of type-2 diabetes by 250%. Another recent study found that excessive intake of sugar was the single most important dietary risk factor for heart disease in women and for men. It has been estimated that sugar intake may account for more than 150,000 premature deaths from heart disease in the United States each year.12
Xylitol has been demonstrated in repeated clinical studies to be very slowly metabolised. In fact, on the glycemic index, which measures how quickly foods enter the bloodstream, sugar is rated at 100 and xylitol at just seven! Xylitol is a natural insulin stabilizer, therefore it causes none of the abrupt rises and falls that occur with sugar. In fact, it actually helps in stopping sugar and carbohydrate cravings. Foods sweetened with xylitol will not raise insulin levels. This makes it a perfect sweetener for people with diabetes as well as those wanting to lose weight. There is a growing consensus amongst anti-aging researchers that maintaining low insulin levels is a key to a successful anti-aging program.
Insulin resistance also plays a significant role in hormonal imbalances, including those that lead to breast cancer. High insulin levels increase the production of estrogens, leading to an estrogen-dominant condition, and also interfere with healthy ovarian function. Insulin resistance is a major cause of a growing hormonal problem called polycystic ovarian syndrome (PCOS). PCOS causes the ovaries to become anovulatory, which means that the normal cyclic production of estrogen followed by progesterone either ceases or becomes dysfunctional. Insulin stimulates the ovaries to produce predominantly male hormones, which, in combination with higher insulin and glucose levels, increase weight gain around the waist-a body type that is a risk factor for breast cancer. Signs that the body is being exposed to higher levels of the male hormones include acne, loss of head hair, and an increase in body hair. Lowering insulin levels is crucial for not only treating PCOS but also resolving most other hormonal imbalances, including those leading to breast cancer.13
Dr. John Lee, author of What Your Doctor May Not Tell You About Breast Cancer, explains the connection between insulin resistance and breast cancer:
"Overeating junk food makes you fat. Increased body fat and lack of exercise lead to insulin resistance. Insulin resistance leads to further craving of sugary carbohydrates to generate energy for the body. More insulin is released in response to increased carbohydrate intake, leading to more weight gain. More fat leads to more estrogens, which, in turn, lead to earlier breast development and menstruation. Earlier onset of menstruation leads to more ovulatory cycles and a greater lifetime exposure to estrogens without adequate progesterone. A greater lifetime exposure to estrogens increases breast cancer risk.
"Simultaneously, increased consumption of simple carbohydrates, coupled with insulin resistance, leads to polycystic ovaries and lack of ovulation during menstrual cycles, resulting in excess production of androgens and estrogens, along with inadequate production of progesterone. Excessive estrogen production in the absence of progesterone production leads to estrogen dominance and increased breast cancer risk. Use of contraceptive hormones increases insulin resistance, exacerbating all the above problems."14
Using xylitol instead of sugar, as well as reducing intake of high-glycemic, refined carbohydrate foods, helps to lower the risk not only of PCOS but also of ovarian cysts, fibroids, endometriosis, PMS, hot flashes, weight gain, and depression.
