The report on updated evidence for colorectal cancer was published in 2011.
The evidence that foods containing dietary fibre protect against colorectal cancer was upgraded from probable to convincing by the Expert Panel.
The updated meta-analyses (per 10g/d) showed a 10 per cent decreased risk for colorectal cancer. These analyses included 15 studies compared with eight for the Second Expert Report and showed more consistent results.
The updated evidence for other exposures judged convincing and probable for the Second Expert Report was confirmed.
In summary the evidence that:
- Physical activity protects against colon cancer is convincing
- Consumption of red meat and processed meat are causes of colorectal cancer is convincing
- Consuming alcoholic drinks is a cause of colorectal cancer is convincing for men (probably for women)
- Body fatness and abdominal fatness, and the factors that lead to greater adult attained height, or its consequences, are causes of colorectal cancer is convincing
- Consumption of garlic, milk, and calcium, probably protect against colorectal cancer
In addition to the report which summarises the Panel's conclusions, you can view the full systematic literature review (SLR) of the evidence here.