What the Evidence Says About Probiotics and Cancer Immunotherapy

Growing evidence suggests that the gut microbiome, a diverse and complex mix of microorganisms and their metabolites, is closely linked to the immune system, and researchers are studying whether modulating the gut microbiome affects cancer immunotherapy treatment outcomes. In particular, probiotics—which are flora typically obtained through dietary sources such as yogurt and fermented foods or via supplemental forms—are gaining prominence as a potential strategy to modulate the gut microbiome during cancer treatment.