Fecal Microbiota Transplantation (FMT) is a treatment where healthy bacteria from a donor's poop are transferred to the patient's gut. This study aims to see if FMT is safe and helps with diseases that aren't specifically about the stomach or intestines but still cause tummy troubles. Researchers will also look at how FMT affects the gut and other body parts, trying to find the best ways to do the procedure to help patients feel better.

• **Study Length**: Participation requires multiple visits for the procedure and monitoring.
• **Eligibility**: Participants must be able to handle a tube through the nose or swallow a capsule. Those with serious gut problems are not eligible.
• **Risks and Benefits**: While FMT could improve symptoms, there may be unknown risks, so it's important to discuss with your doctor.