Gut microbiome clues point to earlier colorectal cancer detection

A large study identifies a consistent gut microbiome signature in stool that tracks with colorectal tumors across ages, suggesting potential for earlier detection. The cancer-associated microbiome is stronger with low dietary fiber and weaker with higher fiber, while ultra-processed foods are linked to rising colorectal cancer in younger adults. Researchers caution this is not yet a diagnostic test, but it advances understanding of microbiome-disease links and prevention prospects.