While eating fruits and vegetables as an adult may not lower one's chances of developing breast cancer, there are other measures that can help, Smith-Warner said.
"Reducing or eliminating alcohol consumption, increasing physical activity, and controlling body weight can help prevent breast cancer," she said.
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Eating fruits and vegetables may, however, reduce the risks of other cancers, and could even work against breast cancer when consumed during childhood. This effect is attributed to antioxidants, which neutralize cancer-causing chemicals.