By naturopath Margaret Jasinska
Did you know that women with a waist circumference greater than 35 inches (88 centimetres) have a higher risk of breast cancer? This is especially true in postmenopausal women. Being overweight or obese is the single biggest preventable cause of cancer after smoking and is linked to 13 types of cancer including bowel, breast, and pancreas. Waist circumference is an indicator of how much visceral fat a person has on their body. Visceral fat is the deep internal fat that gets inside and around the organs. Having a fatty liver, fatty pancreas, and arteries clogged with fat are all indicators of excess visceral fat. This type of fat produces inflammatory chemicals that cause wear and tear to all parts of the body. Having excess inflammation in your body is a risk factor for cancer. The hormone insulin promotes visceral fat accumulation when it is present in excess. Getting insulin levels down is the best way of reducing your waist circumference and cancer risk.
Insulin is an important and necessary hormone in the human body. The problem is a lot of people make too much of it. That’s known as hyperinsulinaemia and can have dangerous health consequences. Recent research has shown that human breast cancer cells have more than 6 times the number of insulin receptors than healthy breast cells. This enables glucose to bind to the cancerous cells and speed their growth. Breast cancer is a frightening disease and it’s becoming far too common. Approximately 1 in 7 women in Australia will develop invasive breast cancer in their life. Only 5 to 10 percent of breast cancer cases are due to a strong family history or a known genetic mutation.
We have known for some time that the growth of breast cancer cells is under the regulation of hormones, growth factors and their receptors. Researchers tested 159 breast cancer tissue specimens for insulin receptor content. What they found was quite startling; the number was more than sixfold higher than the mean value found in 27 normal breast tissues obtained from women who had a total mastectomy as well as the six normal specimens obtained from women receiving breast reduction surgery. The insulin receptor content in breast cancer tissues was also higher than in any normal tissue tested, including the liver which is supposed to be high in insulin receptors. Additionally, testing revealed that the insulin receptor content of the tumours correlated positively with tumour size, tumour grading, and the oestrogen receptor content. In summary, breast cancer cells with more insulin receptors are harder to treat and more life-threatening.
Insulin is a growth-promoting hormone. Your blood level of insulin spikes during childhood and puberty, when your body needs to grow rapidly. As an adult, you don’t require high levels of insulin unless you are pregnant. Excess insulin can encourage the growth of tumours, fibroids, nodules, polyps, cysts, acne, as well as excess body fat. The insulin receptors on the breast cancer cells bind with glucose. Glucose is then allowed to enter the cancer cells where it speeds up their growth. Sugar also raises inflammation in the body, and inflammation speeds cancer growth.
To maintain good health, it is vital to keep your blood insulin level low. How would you know if your blood insulin level is elevated? There is a fasting insulin blood test that your doctor can order for you. A good clue is your waist circumference. People with a slim waist almost always have low-normal insulin levels.