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"Keep in mind that every lifestyle factor counts and it is never too late to adopt a healthy lifestyle," said study co-author Bernard Srour, of the French National Institute of Health and Medical Research.
Researchers analyzed data from more than 41,000 adults in France, age 40 and older, who had never been diagnosed with cancer. Between May 2009 and January 2017, nearly 1,500 cases of cancer were diagnosed in the group.
But those who fared best cancer-wise adhered more closely to dietary guidelines developed by the World Cancer Research Fund (WCRF) and the American Institute for Cancer Research (AICR), the researchers said.
A 1-point increase on the guidelines' score of healthy eating was associated with a 12 percent decrease in overall cancer risk, a 14 percent decrease in breast cancer risk, and a 12 percent decrease in prostate cancer risk.
The study was published July 26 in the journal Cancer Research.
The study authors concluded that the "synergistic contribution" of a healthy diet was more significant than any single dietary recommendation in reducing cancer risk.
For example, antioxidants from fruits and vegetables may counteract some of the cancer risks posed by red meat and processed meat. Similarly, by lowering blood pressure, exercise could partly offset the effects of high-salt foods.
The researchers said the WCRF/AICR recommendation to avoid alcohol most likely contributed to that diet's role in reducing cancer risk.
"In its last report, the WCRF stated that there is now strong, convincing evidence that alcohol consumption increases the risks of oropharyngeal, esophagus, liver, colorectal and postmenopausal breast cancers," said study co-author Mathilde Touvier, also of the French Institute of Health and Medical Research and the University of Paris.
It appears alcohol is linked with stomach and premenopausal breast cancers as well, Touvier added.
-- Robert Preidt
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