Short-Chain Fatty Acids as Functional Postbiotics in Colorectal Cancer Management

Short-chain fatty acids (SCFAs), such as butyrate, acetate, and propionate, are the result of microbial fermentation and have been demonstrated to exert anticancer effects in different experimental models. We systematically reviewed 27 studies on postbiotics in colorectal cancer models, enclosing a range of study types including cell lines, animal models, and organoids. Eight studies that focused specifically on SCFAs were identified and analyzed. SCFAs promoted apoptosis through caspase activation, influenced NF-κB and MAPK signaling, increased mucin expression, and strengthened barrier function. Butyrate has also been demonstrated to induce autophagy via LKB1–AMPK signaling. Studies using SCFA-containing supernatants showed similar effects, although the presence of multiple biomolecules limited attribution. Overall, these findings provide a robust foundation for further research, particularly in the context of translational studies that can bridge the gap between preclinical and clinical research.