An expert has warned that eating badly could increase the likelihood of developing some forms of cancer, after research suggested breast cancer survivors can reduce the risk of the disease returning by taking medication.
Dr Mark Matfield - scientific co-ordinator at the Association for International Cancer Research - noted that while there is a lack of concrete evidence at present, there appears to be a consensus that lifestyle factors do play a role in causing cancer.
"It is likely that a significant part of the difference in female cancer risk is due to obesity and alcohol, but that is informed speculation rather than experimental evidence," he explained.
The combined impact of eating habits, environment and other personal aspects cause between one-third and half of all cancer cases, Dr Matfield added.
His comments came after experts from Cancer Research UK found women who regularly take tamoxifen over an extended period after initially beating breast cancer can be up to a third less likely to have the illness return.