References

Restoring Immune Function - https://pubmed.ncbi.nlm.nih.gov/33175698/

Dysbiotic Gut / Irritable Bowel Syndrome ("IBS") - https://pubmed.ncbi.nlm.nih.gov/28628918/

Cancer Management - https://pubmed.ncbi.nlm.nih.gov/30458058/

Boosting Cancer Immunotherapy - https://hillmanresearch.upmc.edu/fecal-transplant-boosts-cancer-immunotherapy/

Diarrhea and Colitis - https://www.gastroendonews.com/PRN/Article/01-23/Fecal-Microbiota-Transplant-Found-Effective-for-Immune-Mediated-Colitis/69109

Traumatic Brain Injury - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7894052/

Hepatic Encephalopathy - https://www.sciencedaily.com/releases/2017/04/170421084925.htm

Chronic Fatigue Syndrome ("CFS") - https://www.sciencedirect.com/science/article/pii/S2452231719300077

https://gastro.org/news/fda-approves-first-fecal-microbiota-transplantation-therapy/

https://pubmed.ncbi.nlm.nih.gov/33007265/

https://pubmed.ncbi.nlm.nih.gov/36818228/

https://www.prnewswire.com/news-releases/autism-more-than-hope-non-verbal-19-year-old-says-mama-after-fmt-and-shows-corrected-microbiome-301657749.html

https://www.sciencedaily.com/releases/2022/05/220504082622.htm

https://www.frontiersin.org/articles/10.3389/fnagi.2022.991157/full

https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-022-01243-w

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7244050/

https://www.frontiersin.org/articles/10.3389/fcimb.2019.00002/full

This is an in treating question, and it appears from the research that it depends on what the FMT application is for. 

For instance, this study showed a positive effect of antibiotic c pretreatment + FMT over just FMT alone in ulcerative colitis patients - https://www.nature.com/articles/s41598-022-09307-5

Whereas this study showed the opposite effect in FMT treatment for IBS-D - https://www.viome.com/products/gut-intelligence

Studies have shown that including a water soluble prebiotic fiber such as Inulin may contribute to better FMT results - 

https://assets.researchsquare.com/files/rs-1742266/v1/3bc49898-0a2e-4132-bb17-4c1db33b3ed2.pdf?c=1660203062

https://www.frontiersin.org/articles/10.3389/fimmu.2022.842669/full

Find a link to a quality prebiotic fiber here - 

We recommend having your microbiota analyzed before and 6-8 weeks post FMT to determine successful microbiota strain engraftment.  Links to testing can be found here -