| Recruiting | A Randomized, Triple-blind, Placebo-controlled Study to Evaluate the Effects of a Supplement on Nutrient Gaps NCT07437911 | Athletic Greens International | N/A |
| Recruiting | Smart Underwear to Measure Diet-Induced Hydrogen Sulfide Production NCT06802276 | University of Colorado, Denver | N/A |
| Recruiting | Microbiome and Diet in Parkinson's Disease NCT06207136 | University of British Columbia | N/A |
| Completed | The Effects of a Novel Nutritional Product on Nutrient Gaps and Gut Health in Adults With Occasional Gastroint NCT06564285 | Athletic Greens International | N/A |
| Completed | The Effects of a Novel Nutritional Product on Nutrient Gaps and Gut Health in Active Adults NCT06521424 | Athletic Greens International | N/A |
| Recruiting | Efficacy and Safety of Fecal Microbiota Transplantation (FMT) in Reducing Recurrence of Colorectal Adenoma (CR NCT06205862 | Shenzhen Hospital of Southern Medical University | Phase 2 |
| Recruiting | Clinical Characteristics of Sleep Disorders in Patients With Ulcerative Colitis NCT06359808 | Xijing Hospital | — |
| Completed | The Effects of a Nutritional Supplement on Nutrient Status and Quality of Life NCT06332898 | Athletic Greens International | N/A |
| Recruiting | COffee and Metabolites Modulating the Gut MicrobiomE in Colorectal caNCER NCT05692024 | Massachusetts General Hospital | Phase 1 / Phase 2 |
| Not Yet Recruiting | Involvement of the Gut Microbiota in Calcified Aortic Stenosis NCT06021535 | Insel Gruppe AG, University Hospital Bern | — |
| Completed | Modulation of the Gut Microbiota of Professional Athletes With Sauerkraut Supplementation NCT06087146 | The Gut Microbiome Center (Centar za crijevni mikrobiom) | N/A |
| Unknown | Benefits of Alcoholic Hangover Medicine NCT06126094 | The Gut Microbiome Center (Centar za crijevni mikrobiom) | N/A |
| Recruiting | Influence of Short-Term Antibiotic Therapy on Exercise NCT05961189 | Rutgers, The State University of New Jersey | EARLY_Phase 1 |
| Completed | The Effects of a Novel Nutritional Product on Nutrient Status and Digestive Health NCT06181214 | Athletic Greens International | N/A |
| Completed | Predicting Adenomatous Polyps in the Colon Using Images of a Human Tongue NCT06305364 | Jubaan Ltd. | N/A |
| Completed | Effect of Probiotics on Amino Acid Absorption NCT05752266 | Singapore Institute of Technology | N/A |
| Unknown | Study the Effect of Water Kefir Consumption on the Gut Microbiome in Healthy Adults NCT05657730 | Lund University | N/A |
| Not Yet Recruiting | Effect of Prebiotics on Blood Pressure Management NCT05364736 | Sun Yat-sen University | N/A |
| Unknown | Assessment of Cognitive Function and Gut Microbiota Analysis in Real World Patients With Lupus Cerebrovascular NCT05636670 | Nanfang Hospital, Southern Medical University | — |
| Completed | Multi-omics Analyses Reveal Microbiota-gut-brain Axis in ICU Patients With Post-cardiac Surgery Delirium NCT05628480 | China National Center for Cardiovascular Diseases | — |
| Recruiting | Cancer-associated Muscle Mass - Molecular Factors and Exercise Mechanisms NCT05307367 | University of Copenhagen | N/A |
| Completed | Effect of Oral Microbiota on MDRO Decolonization NCT07496502 | Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran | Phase 1 / Phase 2 |
| Unknown | Effect of Carbon Dioxide Insufflation and Appendix on the Restoration of Intestinal Microecology After Colonos NCT05637021 | Zhongshan Hospital Xiamen University | — |
| Unknown | The Effect of Micronutrient Supplementation on Gut Microbiome Composition and Function NCT05371704 | University of Glasgow | N/A |
| Unknown | Fecal Metagenomics and Metabolomics Analyses to Identify Potential Screening Biomarkers for Colorectal Polyps NCT04947930 | Sixth Affiliated Hospital, Sun Yat-sen University | — |
| Unknown | Deep Brain Stimulation Therapy and Intestinal Microbiota NCT04855344 | The First Affiliated Hospital with Nanjing Medical University | — |
| Completed | Assessing the Dose Response of a Lead Fiber Snack Prototype NCT04729816 | Washington University School of Medicine | N/A |
| Completed | Luxembourgish Fiber Cohort NCT04352231 | Luxembourg Institute of Health | N/A |
| Completed | PRevention Using EPA Against coloREctal Cancer NCT04216251 | Massachusetts General Hospital | Phase 1 / Phase 2 |
| Completed | The Effect of Maternal Dadiah Supplementation During Pregnancy on Child Growth and Gastrointestinal Health Out NCT05140928 | Andalas University | N/A |
| Recruiting | A Study to Explore the Role of Gut Flora in COVID-19 Infection NCT04359836 | ProgenaBiome | — |
| Unknown | Microbiome Analysis in esoPhageal, PancreatIc and Colorectal CaNcer Patients Undergoing Gastrointestinal Surge NCT04189393 | Radboud University Medical Center | — |
| Unknown | Impact of Okara and Bio-okara Food Product on Gut and Glycaemic Health in Middle-aged and Older Adults in Sing NCT03978104 | National University of Singapore | N/A |
| Suspended | A Non-Interventional Pilot Study to Explore the Role of Gut Flora in Disease NCT04031469 | ProgenaBiome | — |
| Completed | Exercise Study in Subjects With NAFLD NCT03995056 | University of Eastern Finland | N/A |
| Terminated | Gastrointestinal Tract Microbiome in Healthy Term Infants Receiving Mother'S-own Breast Milk or Cow's Milk-bas NCT04059666 | Mead Johnson Nutrition | N/A |
| Terminated | The Alberta BLOOM Preterm Neonate Study NCT03840980 | University of Calgary | — |
| Completed | Effects of Cranberry Supplementation on Chronic Kidney Disease Patients. NCT04377919 | Universidade Federal Fluminense | N/A |
| Unknown | Post-Ibrutinib Colitis and Intestinal Microbiota NCT03569137 | Nantes University Hospital | — |
| Completed | Response of the Gut Microbiome and Circulating Metabolome to Diet in Children: Ancillary Study to KIDFIT (NCT0 NCT03612479 | Northwestern University | N/A |
| Recruiting | Vaginal Microbiome Seeding and Health Outcomes in Cesarean-delivered Neonates. NCT03298334 | National Institute of Allergy and Infectious Diseases (NIAID) | Phase 1 / Phase 2 |
| Unknown | Cognition and Gut Microbiome Associated Study of Shanghai People With Acute Ischemic Stroke NCT03812445 | Shanghai 10th People's Hospital | N/A |
| Completed | Gut Microbiome in Colorectal Cancer NCT04054908 | University of California, San Francisco | — |
| Completed | Study on the Mechanism of Regulating Gut Microbiome in Obese People by Regulating Brain-gut Axis With Fast Die NCT04691583 | Henan Provincial People's Hospital | N/A |
| Unknown | Analysis of Intestinal Microflora Combined With DNA Methylation in Stool to Detect Colorectal Cancer NCT04302363 | WEIDONG LIU，MD | — |
| Active Not Recruiting | Identification of New Biomarkers of Insulin Resistance NCT03362554 | University of Bath | N/A |
| Completed | Effects of Fermented Vegetables on Gut Microflora and Inflammation in Women NCT03407794 | University of North Florida | N/A |
| Unknown | Gut Microbiome Associated Study of Shanghai Infants With Jaundice NCT03510936 | Shanghai 10th People's Hospital | N/A |
| Unknown | A Cohort Analysis Study of Intestinal Flora in Infants NCT03396198 | Mizu Jiang | — |
| Completed | The Timing of Main Meal Consumption Effect on Gut Microbiota and Host NCT03949543 | University of Glasgow | N/A |
| Completed | Effects of Vigiis 101-LAB on a Healthy Populations' Gut Microflora, Peristalsis, Immunity, and Anti-oxidative NCT04046432 | SunWay Biotech Co., LTD. | N/A |
| Completed | Characterization of Gut Microbiota in Chronic Liver Disease With Decreased Muscle Mass NCT05729269 | Chuncheon Sacred Heart Hospital | — |
| Unknown | Shanghai Infants Gut Microbiome Associated Study NCT03388112 | Shanghai 10th People's Hospital | N/A |
| Completed | Effect of Exclusive Enteral Nutrition on Disease Process, Nutritional Status and Gastrointestinal Microbiota f NCT03755583 | Children's Hospital of Fudan University | N/A |
| Completed | Characterization of Rebound Pain Following Peripheral Nerve Block and Its Association With Gut Microbiome Dive NCT02998177 | Cork University Hospital | — |
| Completed | Human Pilot Study - HA35 (Hyaluronan Molecular Weight 35) Dietary Supplement for Promoting Intestinal Health NCT02867605 | The Cleveland Clinic | N/A |
| Completed | Effects of Vigiis 101-LAB on a Healthy Populations' Gut Microflora NCT04088474 | SunWay Biotech Co., LTD. | N/A |
| Completed | Testing the Effect of Whole-wheat Sourdough Bread Compared to White Bread on Healthy Individuals NCT02936362 | Tel-Aviv Sourasky Medical Center | N/A |