Is there any approved microbiome therapy for cancer patients?

No. There are FDA-approved microbiome therapies accessible for patients with Clostridium difficile (C. diff) infection but not yet for cancer. However, there is more and more evidence emerging and new clinical trials launched, all of which may pave the path towards novel diagnostic and therapeutic routes in the future:

• Melanoma and microbiota: Current understanding and future directions: https://www.cell.com/cancer-cell/fulltext/S1535610823004312
• Association of a Mediterranean Diet With Outcomes for Patients Treated With Immune Checkpoint Blockade for Advanced Melanoma: https://jamanetwork.com/journals/jamaoncology/fullarticle/2801594
• Long-term dietary patterns are associated with pro-inflammatory and anti-inflammatory features of the gut microbiome: https://gut.bmj.com/content/70/7/1287.abstract
• Fecal microbiota transplantation plus anti-PD-1 immunotherapy in advanced melanoma: a phase I trial : https://pubmed.ncbi.nlm.nih.gov/37414899/