Diet a major factor in breast cancer time for government action

Hamburg, Germany: The rapid increase in the knowledge of breast cancer determinants and the continuing increase in incidence of breast cancer means that it is time to move from knowledge to action, a scientist said today (Friday 19 March) at the 4th European Breast Cancer Conference. Dr. Franco Berrino, head of preventive and predictive medicine at the Instituto Nazionale Tumori, Milan, Italy, said that high levels of sex hormones and insulin-like growth factors were associated with cancer risk, and that the typical western diet increased their biological effect.

"Breast cancer risk can be reduced by avoiding hormone replacement therapy, increasing physical activity, not being overweight, and eating a more healthy diet", said Dr. Berrino. "The problem with the diet of most people in the West is that it tends to include processed foods high in sugars and fats, too much red meat and dairy products, and not enough unrefined grains and vegetable products. This diet reduces the body's sensitivity to insulin, and this in turn stimulates the production of sex hormones and other growth factors, which are directly linked to breast cancer risk."

Eating more of the latter and less of the former food groups would not only reduce obesity, but would reduce the risk of several cancers, as well as cardiovascular and other chronic diseases, he said.

Dr. Berrino is currently looking at the effect of diet and hormonal risk factors in women carrying a mutated BRCA1 and BRCA 2 gene, the most common mutation found in breast cancer. These women have a very high lifetime risk of developing breast cancer, and most of them develop the disease in their 30s or 40s. However, he said, it is not clear why some mutation carriers develop the disease and others do not, nor why some develop it early and some much later in life. "Our hypothesis is that the incidence of breast cancer among mutation carriers depends on environmental factors, of which diet will be a ma

Contact: Mary Rice
Federation of European Cancer Societies

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