Breast Cancer: More Veggies Not Better
Breast Cancer Survival Has No Extra Benefit With ‘Over-the-Top’ Veggie Eating
WebMD News Archive
July 17, 2007 -- Healthy diet and exercise may help women survive breast
cancer -- but eating more than five daily servings of fruits and vegetables
doesn't offer extra benefit.
The disappointing finding comes from a seven-year study of more than 3,000
women successfully treated for early breast cancer.
University of California, San Diego cancer researcher John P. Pierce, PhD,
and colleagues urged half the women to eat the "5-A-Day" servings of
fruits and vegetables recommended by the National Cancer Institute. The other
half of the women underwent intensive training to get them to eat even more of
these healthy foods.
"We got people up to 12 servings of fruits and vegetables a day,"
Pierce tells WebMD. "So how extreme do you need to go? If you take five
servings a day, do you need to go over the top? The answer is no. But this
doesn't mean you should not eat your 5-A-Day."
After trying to follow their diets for more than seven years, 17% of the
women in each group saw their cancer return, and 10% in each group died.
Pierce and colleagues report their findings in the July 18 issue of
TheJournal of the American Medical Association. An editorial by
Susan M. Gapstur, PhD, associate director for cancer prevention and control at
the Robert H. Lurie Comprehensive Cancer Center of Northwestern University,
Chicago, accompanies the study.
Gapstur and Pierce agree that the study showed no added breast cancer
survival benefit from adding extra servings of fruits and vegetables.
Gapstur notes that while the women seemed to eat a lot of healthy foods,
they also ate more fats than they were supposed to.
"While it did appear the fruit and vegetable intake increased, clearly
the self-reported total diet and fat intake didn't achieve its goal,"
Gapstur tells WebMD. "The dietary fat intake did not improve. In fact, the
women seemed to be eating a higher quantity of fat at the end of the study than
they were at the start."
Pierce points to an earlier report on these women in the June 10 issue of
the Journal of Clinical Oncology. That study found that regardless of
whether they were obese, breast cancer survivors who followed the 5-A-Day diet
-- and exercised about 30 minutes a day -- had significantly improved