A new study conducted at the Harvard T.H. Chan School of Public Health, and published in the British Medical Journal, has found that consuming high levels of fruit as a teenager – and oranges and kale as a young adult – can significantly reduce the risk of breast cancer.
For the study, researchers took data from 90,476 premenopausal women currently aged 27 to 44 from the Nurses’ Health Study II who completed a questionnaire on diet in 1991, and compared it to a diet questionnaire completed in 1998 by 44,223 of those women. They then did a follow up in 2013.
“There were 3235 cases of invasive breast cancer during follow-up to 2013”, states the study’s abstract. “Of these, 1347 cases were among women who completed a questionnaire about their diet during adolescence (ages 13-18). Total fruit consumption during adolescence was associated with a lower risk of breast cancer.”