Brewing the evidence: Coffee consumption and colorectal cancer prognosis: From associations to potential underlying mechanisms

Large bowel cancer is the third most common cancer worldwide. Because lifestyle factors can influence recovery and survival, this study explored whether drinking coffee helps people who had large bowel cancer and why.

Among 1,719 patients, we found that higher coffee intake was linked to a lower risk of the cancer returning. People drinking over four cups daily had a 32% lower risk than those drinking under two. The greatest survival benefit was seen around four cups a day, regardless of other health conditions like diabetes.

To explain this, we examined blood metabolites – small molecules produced by body processes. We identified 81 coffee-related metabolites. Those increased by coffee were generally linked to better outcomes, while those decreased by coffee were linked to higher risk. Many of these molecules affect gut bacteria, heart health, and liver function.

Overall, drinking about 4 cups of coffee daily may improve survival among those with large bowel cancer, offering key insights for future patient guidelines.