Effect of Gastrogenic Microbiota in FD

Inclusion Criteria: * Adults aged ≥18 and ≤70 years, with symptoms such as upper abdominal pain or burning sensation, postprandial bloating, early satiety, etc., and who meet the diagnostic criteria for functional dyspepsia (FD) according to the Rome IV criteria. * Negative result on the C13 urea breath test, and no organic changes observed on gastroscopy. Exclusion Criteria: * Use of acid-suppressing drugs, prokinetic agents, antibiotic or anxiolytics within 4 weeks prior to enrollment. * History of abdominal surgery, abdominal or inflammatory bowel disease, diabetes, active psychiatric disorders, or severe diseases of vital organs such as the heart, lungs, liver, or kidneys. * Pregnant or breastfeeding participants, or those currently involved in other clinical research studies.