The World Cancer Research Fund and the American Institute for Cancer Research had independent scientists at Imperial College in London review all the 1012 ‘cancer and diet’ studies in the medical literature.
This was the most comprehensive, evidence-based research on cancer and diet ever undertaken.
Following that, another Independent Expert Panel reviewed the results and made judgements.
What did they recommend?
“Consume a plant-based diet. On meat, the clear message that comes out of our report is that red and processed meat increases risk of bowel cancer and that people who want to reduce their risk should consider cutting down the amount they eat.” Teresa Nightingale, General Manager of WCRF said, “Many people feel confused about cancer prevention because it can seem like a new study is published every week that suggests that a new substance either causes or prevents cancer. But this takes the latest scientific findings and adds them to the existing body of evidence in a way that ensures our advice takes the latest research into account. This means people can be confident that our recommendations are up-to-date as well as being the most evidence-based information on cancer prevention available anywhere in the world. This latest report shows that there is enough evidence to recommend that people can reduce their bowel cancer risk by consuming less red and processed meat and alcohol, having more foods containing fibre, and by maintaining a healthy weight and being regularly physically active. This report confirms that bowel cancer is one of the most preventable types of cancer…”
From the report ‘Expert Report, Food, Nutrition, Physical Activity, and the Prevention of Cancer: a Global Perspective’, Word Cancer Research Fund (WCRF) and AICR, 2007–11.