“…Gut microbiota has been widely identified as a potential adjunct to sensitizing immunotherapy. 1 The microbial composition of faeces varies in patients with different sensitivities to immunotherapy, and the efficacy of immunotherapy can be influenced by faecal microbiota transplantation or supplementation with specific strains. We recently reported in Cell that a gut microbiota derivative, indole‐3‐propionic acid (IPA), increases the responsiveness of cancer immunotherapy by modulating T‐cell stemness.…”