Block says fiber is beneficial because it can help women control their appetite and may decrease the number of calories they consume. Achieving and maintaining a healthy weight, particularly after menopause, is widely viewed as one factor that influences survival.
Which is why Estabrook at the Comprehensive Breast Center is offering that nutrition class in the first place.
"When you look at cancers, most are caused by weight gain," she said. "The fatter you are, the more estrogen circulates in your body, and when there's more estrogen, the risk of breast disease increases.
"But cancer survival is not just about eating one kind of fruit or vegetable. It's about making the right lifestyle choices, including exercise. Diet is one part of a larger picture."