By Cancer Site

Evidence shows that diet, physical activity and weight affect the risk of many types of cancer. For some cancers, it is not yet possible to determine if these factors play a role. This does not mean such links do not exist, simply that more research is needed. AICR reports examine the evidence linking diet, physical activity and weight to 17 cancers using a rigorous and systematic process.

Strong evidence of link

Visit each cancer site below to see how diet, weight and physical activity raises or lowers risk:

No Strong Evidence of a link

AICR reports also examined the available evidence for other cancers using the same process. The results are as follows*:

  • Cervical Cancer
    There is as yet no strong evidence that any aspect of diet, physical activity and weight influences the risk of cervical cancer.
  • Bladder Cancer
    There is as yet no strong evidence that any aspect of diet, physical activity and weight influences the risk of bladder cancer.
  • Skin Cancer
    It is well established that skin cancer is directly caused by excessive sun exposure. No strong evidence emerged, that skin cancer links to diet, weight and physical activity with the exception of arsenic in drinking water, for which a probable link to skin cancer was found.
  • Nasopharyngeal Cancer
    This cancer is rare in the United States but common in Southern China. Analysis of global evidence concluded that Cantonese-style salted fish is probably a cause of this cancer.

Lifestyle and Other Cancers

For the following cancers, evidence was too limited to examine. AICR/WCRF reports issued no conclusions about them but flagged the need for further research on possible lifestyle links. And although there is currently insufficient evidence to definitively determine if these cancers are related to diet, weight and physical activity, AICR funds innovative research involving these cancers that seeks to find and map such links.

  • Thyroid Cancer
  • Testicular Cancer
  • Lymphoma (Hodgkin’s and Non-Hodgkin’s)
  • Leukemia
  • Multiple Myeloma
  • Cancers of the Musculoskelatal System (Liposarcoma, fibrosarcoma, osteosarcoma, myosarcoma)
  • Cancers of the Nervous system (Glioblastoma, meningoma, sellar tumor, cranial tumor, spinal nerve tumor, central nervous system lymphoma)

What Convincing and Probable Mean

The expert conclusions from the global research fall into clear and defined categories. Here's what they are:

  • Convincing - strong, consistent and unlikely to change in the future
  • Probable - ompelling but not quite strong or consistent enough to be "convincing"
  • Limited Evidence, Suggestive - too limited for a grade of "probable", but a general consistency in the data
  • Limited Evidence, No Conclusion - too inconsistent or insufficient for a definitive grade
  • Substantial Effect on Risk Unlikely - enough evidence to rule out a connection