The first experiment ever to show that low-fat diets could help prevent a return of breast cancer now reveals, with longer follow-up, that the benefit was almost exclusively to women whose tumor growth was not driven by hormones.
The new results suggest but cannot prove that these women might be able to cut their risk of dying from cancer by up to 66 percent with such diets.
"That's as great or better than any treatment intervention that we've given" for this type of cancer, which is notoriously hard to treat, said Dr. C. Kent Osborne of Baylor College of Medicine in Houston. He had no role in the study.
However, for women whose cancers are fueled by hormones - the vast majority of breast cancer patients - the diet change seemed to make little difference in survival.
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