Colorectal cancer is one of the most common cancers worldwide, and what we eat can significantly influence our risk of developing it. Their findings point to deoxycholic acid (DCA), a substance produced when particular gut bacteria chemically transform bile acids made by the liver. Colorectal cancer is the third most common cancer worldwide and is increasingly affecting young people. However, earlier research had not established whether bacterial DCA production directly connected a Western-style diet with colorectal cancer development. The modified bacteria also caused less epithelial cell proliferation in human colon organoids – miniature, simplified versions of colon tissue grown in the laboratory.