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PURPOSE OF REVIEW: This review summarizes the history and current landscape of fecal microbiota transplantation (FMT), with an emphasis on use of the therapy for Clostridioides difficile infection (CDI), inflammatory bowel disease (IBD), and irritable bowel syndrome (IBS). We clarify indications, evidence, and current recommendations for FMT-highlighting major advances and minor setbacks that have led to the state of FMT in 2025. RECENT FINDINGS: After decades of steady progress, the U.S. Food and Drug Administration (FDA) approved the first FMT-based therapies: fecal microbiota, live-jslm and fecal microbiota spores, live-brpk-in 2022 and 2023, respectively. The 2024 American Gastroenterological Association (AGA) Practice Guideline on Fecal Microbiota-Based Therapies for Select Gastrointestinal Diseases made specific recommendations for conventional FMT and these FDA-approved therapies for multiple CDI presentations, as well as for IBD and IBS. Conventional FMT remains an option for CDI; however, OpenBiome's halt of shipped, frozen FMT preparations on December 31, 2024, has made access more challenging in 2025. Although first reported almost seventy years ago, extensive efforts over the last two decades have placed FMT in routine algorithms for many patients with CDI. While understanding of the intestinal microbiome's role in other gastrointestinal conditions is expanding, and FMT may modulate these pathways, additional evidence is needed before FMT becomes routine outside CDI.
Miller et al. (Wed,) studied this question.