| Not Yet Recruiting | Gut Microbiota Modulation With Synbiotics After Acute Coronary Syndrome NCT07411287 | Centre Hospitalier de Bienne | N/A |
| Recruiting | Effect of Consuming a Mango and Chia-based Beverage on Modulating the Intestinal Microbiota in Obese Children NCT07529119 | Universidad Nacional de Caaguazu | N/A |
| Recruiting | Flourish: Exploring the Early Infant Gut Microbiome NCT07333482 | Seeding Inc | N/A |
| Active Not Recruiting | Adaptation of Lung Transplant Recipients at Extreme Altitude NCT07479511 | Medical University of Vienna | — |
| Not Yet Recruiting | Modulation of Gut MicroFLORA With Rifaximin to Reduce High Platelet Reactivity in Post-ACS Patients on Ticagre NCT07203846 | Collegium Medicum w Bydgoszczy | Phase 4 |
| Not Yet Recruiting | Innate Immunity, MIcrobiota and Inovative Treatments in Endometriosis NCT07078435 | University Hospital, Grenoble | N/A |
| Not Yet Recruiting | Impact of Colostrum Oropharyngeal Immunotherapy on Postnatal Growth in Preterm Infants NCT07082881 | Suqian First Hospital | N/A |
| Completed | Relationship Between Frailty and Gut Microbiota in Older Adults: An Educational Program for Healthy Aging NCT07251322 | University of Cadiz | — |
| Not Yet Recruiting | Non-interventional Study Exploring the Composition of the Valvular Microbiota of Patients Undergoing Cardiac S NCT07075601 | University Hospital, Toulouse | N/A |
| Recruiting | Infant Microbiota Restoration With Maternal Microbes NCT07212361 | University of Helsinki | N/A |
| Recruiting | Effects of Cranberry on Gut and Metabolic Health NCT07460856 | Laval University | N/A |
| Recruiting | Effectiveness of Coenzyme Q10 and Probiotics in Periodontal Therapy During Pregnancy NCT07029360 | University of Pavia | N/A |
| Completed | FILIP: Fat Intake, Inflammation and LIPids NCT06640036 | Göteborg University | N/A |
| Enrolling By Invitation | Impact of Dietary Intervention on Inflammation and Microbiome Composition Post-Colonoscopy NCT06603519 | University of California, San Diego | N/A |
| Recruiting | Exploring Clinical Characteristics of Liver Disease Patients Based on Digestive Metabolic Exhaled Air NCT06968234 | Shanghai Zhongshan Hospital | — |
| Recruiting | MICRO-BRAIN 2024: Study on Pediatric Brain Tumors NCT07417085 | Meyer Children's Hospital IRCCS | N/A |
| Recruiting | Effects of Endocrine Disruptors on the Gut Microbiota and Assessment of Their Impact on Colorectal Cancer Deve NCT06809660 | Poitiers University Hospital | N/A |
| Recruiting | Comprehensive Analysis of Gut Microbiota Signatures in Metastatic Colorectal Cancer NCT07154173 | Sixth Affiliated Hospital, Sun Yat-sen University | — |
| Completed | The Effects of a Postbiotic Supplement on Biomarkers of Gut Health NCT07527286 | Verb Biotics LLC | — |
| Recruiting | Characteristics of Intestinal Microbiome Following Pancreatic Surgery NCT06319755 | Royal Prince Alfred Hospital, Sydney, Australia | — |
| Recruiting | EPIGUT: EPILEPSY AND GASTROINTESTINAL MICROBIOTA: UNDERSTANDING THERAPY RESPONSE NCT07253701 | Karolinska Institutet | — |
| Recruiting | Gut Microbiota in Patients With Limb Lymphedema and Recurrent Lymphangitis NCT06228937 | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | — |
| Completed | Probiotic Effect on Gastrointestinal Symptoms (FLORABIOTIC REFUERZO). NCT06248177 | Clinica Universidad de Navarra, Universidad de Navarra | N/A |
| Completed | Effect of a Probiotic on Microbiota Associated with the Immune System and Inflammation. NCT06313346 | Clinica Universidad de Navarra, Universidad de Navarra | N/A |
| Recruiting | The Effect of Oral Gan Shuangbi During the Perinatal Period on the Recovery of Intestinal Function After Cesar NCT06347770 | Zhe Li | Phase 1 |
| Completed | Effect of Tomato Paste Consumption on the Microbiota-gut-brain Axis in Healthy Adults NCT05891977 | University of Barcelona | N/A |
| Recruiting | Norwegian Microbiota Study in Anorexia Nervosa NCT06144905 | Norwegian University of Life Sciences | — |
| Active Not Recruiting | Infant Restore: Efficacy of Microbiome Analysis and Education NCT06424691 | Seeding Inc | N/A |
| Unknown | Evaluation of the Diagnostic Potential of Artificial Intelligence-assisted Fecal Microbiome Testing for Colon NCT05795725 | Istanbul Medipol University Hospital | N/A |
| Unknown | Evaluation of the Diagnostic Potential of Artificial Intelligence-assisted Fecal Microbiome Testing for Inflam NCT05797207 | Istanbul Medipol University Hospital | N/A |
| Unknown | Exercise Training Influences Gut Microbiota and Cardiovascular Health Through Inflammation Control in Adult Hy NCT05967715 | University of Bologna | N/A |
| Completed | Descriptive Study of the Gene Count in Faecal Microbiota NCT06955572 | University Hospital, Rouen | — |
| Completed | The Effect of Alpha-lactalbumin on Microbiota Composition NCT05674318 | Lo.Li.Pharma s.r.l | N/A |
| Completed | Microbiome Development in the Early Healing of Osseointegrated Implants NCT05941663 | Universidad Complutense de Madrid | N/A |
| Unknown | Microbiota Awareness and Nutrition Education Given to Mothers With Motivational Interview NCT05681208 | Afyonkarahisar Health Sciences University | N/A |
| Completed | Effectiveness of Ophthalmic Antiseptic Preparations NCT05974124 | Azienda Socio Sanitaria Territoriale degli Spedali Civili di Brescia | N/A |
| Completed | Clinical Trial to Evaluate the Efficacy of a Sport Drink After High-intensity Aerobic Exercise NCT05352724 | Bioithas SL | N/A |
| Active Not Recruiting | Clinical and Biological Impact of Gut Microbiota in Adult Patients With Bacteremia During the COVID-19 Pandemi NCT07183722 | Azienda Ospedaliera SS. Antonio e Biagio e Cesare Arrigo di Alessandria | — |
| Completed | Circular Economy and the Design of Healthy and Sustainable Food and Ingredients NCT05394948 | Clinica Universidad de Navarra, Universidad de Navarra | N/A |
| Recruiting | Microbiota and Pancreatic Cancer Cachexia NCT05606523 | Genton Graf Laurence | — |
| Unknown | Relationship Between Microbiota and Prognosis of Hepatocellular Carcinoma(HCC) After Systemic Treatments NCT05443217 | First Affiliated Hospital of Wenzhou Medical University | — |
| Recruiting | The Effects of Night Shift Work on Health Across the Menstrual Cycle NCT06683248 | Uppsala University | N/A |
| Recruiting | Bern Human Organoid-Study to Study Host-microbe Interaction NCT05323357 | Insel Gruppe AG, University Hospital Bern | — |
| Completed | Effect of Oral Microbiota on MDRO Decolonization NCT07496502 | Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran | Phase 1 / Phase 2 |
| Active Not Recruiting | DASH INtervention to INvestigate the Gut NCT04538482 | H. Lee Moffitt Cancer Center and Research Institute | N/A |
| Recruiting | INS, B Cells and Microbiota NCT04924712 | Nantes University Hospital | — |
| Completed | Understanding the Role of Oral Microbiota in Behçet's Disease (BEHCETBIOT) NCT04959435 | University Hospital, Clermont-Ferrand | — |
| Completed | Microbiota and Probiotic Therapy in Ulcerative Colitis Patients NCT07180186 | Tanta University | — |
| Completed | Elucidating the Role of Human Small Intestine Microbiota in Explaining Differences in Postprandial Glucose Res NCT05120661 | Wageningen University | N/A |
| Unknown | Cervical Cancer Screening by Self-sampling in a Cohort of Younger Women in Ethiopia NCT05125380 | Lund University | N/A |
| Completed | The Role of Dietary Titanium Dioxide on the Human Gut Microbiome and Health NCT05864352 | University of Massachusetts, Lowell | — |
| Completed | Effects of Soluble Dietary Fiber on Sport Efficiency and Fatigue Delay in Top Basketball Players NCT05726435 | University of Zagreb | N/A |
| Unknown | Gut Microbiota and Nonpuerperal Mastitis NCT05051215 | First Affiliated Hospital of Harbin Medical University | — |
| Completed | Effect of the Sustainable Diet on Gut Microbiota and the Metabolome: a Randomised Crossover Study NCT05231317 | University of Ulster | N/A |
| Completed | Bacillus Coagulans Effect on Gastrointestinal Function in Healthy Adults. NCT06644001 | Kerry Group P.L.C | N/A |
| Completed | A Probiotic Blend Reduces Gastrointestinal Symptoms and Positively Impacts Microbiota Modulation in a Randomiz NCT05614726 | The Center for Applied Health Sciences, LLC | N/A |
| Unknown | Analysis of Biliary Microbiota in Hepatobiliopancreatic Diseases Compared to Healthy People [MICROBILIO] NCT04391426 | University of Sao Paulo | — |
| Recruiting | Gut-oral Axis Microbiome in Autism Spectrum Disorders NCT05830591 | IRCCS Burlo Garofolo | — |
| Unknown | Microbiota and Symptom Distress in Head and Neck Cancer Patients Receiving Radiotherapy NCT04843644 | Taipei Medical University | N/A |
| Unknown | Diet-glucose-gut Microbiome Net in Women With GDM NCT04930276 | Peking Union Medical College Hospital | N/A |
| Completed | Assessing the Dose Response of a Lead Fiber Snack Prototype NCT04729816 | Washington University School of Medicine | N/A |
| Completed | Microbiome-Tailored Food Products Based On Typical Mediterranean Diet Components NCT05451992 | University of Bari | N/A |
| Unknown | Targeting Microbiota in Female Overactive Bladder Syndrome NCT05328011 | Medical University of Vienna | — |
| Unknown | An Evaluation of a Synbiotic Formula for Patients With COVID-19 Infection NCT04581018 | Siew Chien NG | N/A |
| Active Not Recruiting | Oslo Footballplayers Iron Supplementation and Training (FIT) Study NCT04526678 | Norwegian University of Life Sciences | N/A |
| Recruiting | Capillary Endoscopy Aspiration Catheter NCT04418258 | Cedars-Sinai Medical Center | N/A |
| Unknown | The Epidemiology of Parkinson's Disease in Croatia and the Influence of Genetic Factors and Microbiota on the NCT05008094 | Clinical Hospital Center Rijeka | — |
| Unknown | Analysis of the Microbiome in the Healthy Smokers and COPD Patients NCT04336423 | Asan Medical Center | — |
| Unknown | Endoscopic Sleeve Gastroplasty for Obesity and Microbiota Randomized Trial NCT04200144 | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | N/A |
| Completed | Nutritional Intervention for Children With ASD and/or ADHD NCT05167110 | University Rovira i Virgili | N/A |
| Recruiting | Antibiotic-induced Disruption of the Microbiota NCT04091282 | University of Fribourg | — |
| Completed | The Link Between Diets and Health Indicators NCT04347213 | University of Primorska | — |
| Unknown | Microbiome Analysis in esoPhageal, PancreatIc and Colorectal CaNcer Patients Undergoing Gastrointestinal Surge NCT04189393 | Radboud University Medical Center | — |
| Completed | Healthy Prebiotic and Postbiotic Effects of Peanuts and Peanut Butter: College Intervention Trial NCT04324749 | University of Barcelona | N/A |
| 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 |
| Completed | Effects of Resistant Potato Starch on the Gut Microbiota NCT05242913 | MSP Starch Products Inc. | N/A |
| Unknown | The Effect of Bariatric Procedures on Gut Microbiota in Obese Individuals in United Arab Emirates and Lebanon NCT04200521 | Zayed University | — |
| Completed | The Impact of MS-20 on Gut Microbiota Composition in Adult Individuals NCT04674839 | Microbio Co Ltd | N/A |
| Unknown | Intestinal Microbiota of Breast Cancer Patients Undergoing Chemotherapy NCT04138979 | First Affiliated Hospital of Harbin Medical University | — |
| Unknown | Study on Skin Microbiome of HFS NCT04132713 | First Affiliated Hospital of Harbin Medical University | — |
| Completed | Effects of Maple Syrup on Gut Microbiota Diversity and Metabolic Syndrome NCT04117802 | Laval University | N/A |
| Completed | Optimization of Sampling and Processing of Samples for Molecular Microbial Research on Ocular Surface Samples NCT04193774 | Universitaire Ziekenhuizen KU Leuven | N/A |
| Completed | Impact of Exposure to Persistent Organic Pollutants During Pregnancy on the Composition of Breast Milk and Con NCT03969459 | Centre Hospitalier Universitaire, Amiens | — |
| Unknown | Changes in the Microbiome Associated With Transplantation NCT04280627 | Manchester University NHS Foundation Trust | — |
| Unknown | Maternal Gestational Weight Gain and Microbiota of Maternal and Infant NCT03916354 | Peking Union Medical College Hospital | — |
| Unknown | Probiotics in the Prevention of Hepatocellular Carcinoma in Cirrhosis NCT03853928 | Austral University, Argentina | N/A |
| Completed | Effects of Supplementation With Tocotrienol on Chronic Kidney Disease Patients NCT04900532 | Universidade Federal Fluminense | N/A |
| Completed | Microbiota Study in Liver Transplanted Patients NCT03507140 | University Hospital, Grenoble | — |
| Unknown | Gut Microbiota Pilot Study NCT03897023 | The Catholic University of Korea | — |
| Unknown | Gut Microbiota Pilot Study NCT03892590 | Armed Forces Goyang Hospital | — |
| Completed | Stimulating Fiber Intake Via Personalized Dietary Advice NCT03848546 | Wageningen University | N/A |
| Terminated | The Alberta BLOOM Preterm Neonate Study NCT03840980 | University of Calgary | — |
| Completed | Microbiome in Obsessive-compulsive Disorder NCT03638791 | Karolinska Institutet | — |
| Unknown | The Microbiome of Sputum, Urine and Feces in Healthy Persons and Chronic Obstructive Pulmonary Disease (COPD) NCT03755505 | Asan Medical Center | — |
| Unknown | Predictive Value of Innovative Prognostic Markers (Gut Microbiota, Sarcopenia, Metabolic Syndrome and Obesity) NCT03843905 | University Hospital, Clermont-Ferrand | — |
| Unknown | Community-based Clinical Trial With Microbiota-directed Complementary Foods (MDCFs) Made of Locally Available NCT04015999 | International Centre for Diarrhoeal Disease Research, Bangladesh | Phase 2 |
| Unknown | Community-based Clinical Trial With Microbiota Directed Complementary Foods (MDCFs) Made of Locally Available NCT04015986 | International Centre for Diarrhoeal Disease Research, Bangladesh | Phase 2 |
| Completed | Effects of Cranberry Powder Supplements on Gut Microbiota Diversity and Metabolic Syndrome NCT03754504 | Laval 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 |
| Completed | Characteristics of INTESTINAL DYSFUNCTION in Patients With MULTIPLE SCLEROSIS NCT04599595 | University Hospital of Ferrara | — |
| Unknown | Influence of Mechanical Bowel Preparation on GI Microbiota NCT03465293 | University of Reading | — |
| Unknown | the Microbiota Are Associated With Iodine-131 Therapy and Hypothyroidism NCT03574051 | First Affiliated Hospital of Harbin Medical University | EARLY_Phase 1 |
| Unknown | Influence of Aspirin on Human Gut Microbiota Composition and Metabolome NCT03450317 | Chinese University of Hong Kong | N/A |
| Terminated | Benefits of Almond Consumption in Modulation of Intestinal Microbiome and Novel Disease Risk Biomarkers NCT03327441 | University of Manitoba | N/A |
| Completed | Microbiota-anastomotic Leak Among Colorectal Surgery Patients : Pilot Study NCT03496441 | Centre hospitalier de l'Université de Montréal (CHUM) | — |
| Completed | Origin of the Neonatal Gut Microbiota and Probiotic Intervention NCT06241222 | Third Affiliated Hospital, Sun Yat-Sen University | N/A |
| Active Not Recruiting | The Gut and Oral Bacteria, Atherosclerosis and Ischemic Stroke Study NCT04803838 | Oslo University Hospital | — |
| Unknown | Pelvic Microbiomes of Benign and Malignant Ovarian Diseases NCT03388996 | Lei Li | — |
| Unknown | Intestinal Microbiota and Treatment of GD NCT03433352 | First Affiliated Hospital of Harbin Medical University | — |
| Unknown | The Oral Microbiota is Associated With Autoimmune Thyroiditis NCT03447093 | First Affiliated Hospital of Harbin Medical University | — |
| Completed | L. Reuteri SGL 01 in Nursing Mothers: Effects on Milk Microbiota and Neonatal Gut Colonization NCT07404930 | IRCCS Azienda Ospedaliero-Universitaria di Bologna | N/A |
| Terminated | Microbiome Alterations in IL10RA-deficient Patients After HSCT NCT03752372 | Children's Hospital of Fudan University | — |
| Withdrawn | Project SHARE (motherS Have All the Right microbEs) NCT03239197 | Kimberly-Clark Corporation | — |
| Completed | Intestinal Microbiota and Thyroid Cancer NCT03543891 | First Affiliated Hospital of Harbin Medical University | — |
| Unknown | Probiotics After Discharge NCT02695784 | Newcastle-upon-Tyne Hospitals NHS Trust | Phase 4 |
| Completed | Climate Friendly and Ecological Food on Microbiota NCT03383510 | Mälardalen University | N/A |
| Completed | Evaluation the Association of Microbiome Between Respiratory Tract Samples and Stool Samples in Pneumonic Pati NCT03379779 | Taichung Veterans General Hospital | — |
| Completed | Stability of the Microbiome in IBD and IBS NCT03395548 | Medical University of Graz | N/A |
| Completed | Effect of Spice Consumption on the Microbiome NCT03676803 | University of California, Los Angeles | N/A |
| Active Not Recruiting | Bacterial Transmission In Utero and IBD Risk NCT03116568 | Chinese University of Hong Kong | — |
| Unknown | The Gut-lung Axis in Chronic Obstructive Pulmonary Disease NCT03236480 | Peking University People's Hospital | — |
| Completed | Healthy Patients & Effect of Antibiotics NCT03098485 | Washington University School of Medicine | N/A |
| Withdrawn | Ascitic Fluid Microbiome in Liver Cirrhosis NCT02813590 | Medical University of Graz | — |
| Completed | Immunity Modification of Full Term Infants According to the Type of Feeding and Mode of Delivery NCT03637894 | Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico | N/A |
| Completed | Prebiotic Effects of Isomalto-oligosaccharide NCT02433873 | George Mason University | N/A |
| Completed | Clinical Trial to Assess the Effects of Topical Lotions on Changes in the Skin Microbiome and Associations Wit NCT03673059 | Johnson & Johnson Consumer Products Company Division of Johnson & Johnson Consumer Companies, Inc. | N/A |
| Completed | HIV-Target Cell Response in Women Initiating Various Contraceptive Methods in High HIV-Incidence Areas: Zim CH NCT02038335 | University of Pittsburgh | — |
| Completed | Study of Variation Over Time in the Oral Microbiome NCT02049398 | National Cancer Institute (NCI) | — |
| Unknown | Cognitive and Metabolic Effects of a Probiotic Supplement NCT02005003 | Uppsala University | N/A |
| Completed | Ecological Effect of Arginine Dentifrice on Oral Microbiota NCT02988349 | Sichuan University | N/A |
| Completed | Cigarette Smoking and Oral Microbiota NCT01862809 | National Cancer Institute (NCI) | — |
| Completed | Effect of Intrapartum Antibiotic Prophylaxis (IAP) on the Development of the Neonatal Gut Microbiota. NCT02212002 | IRCCS Azienda Ospedaliero-Universitaria di Bologna | — |
| Terminated | Modulation of Intestinal and Pulmonary Inflammation by Lactobacillus Diet Supplementation in Pediatric Cystic NCT01837355 | Cantonal Hospital of St. Gallen | N/A |
| Recruiting | Standardized Fecal Microbiota Transplantation for Ulcerative Colitis NCT01790061 | The Second Hospital of Nanjing Medical University | Phase 2 / Phase 3 |
| Recruiting | Gut Microbiota in Chronic GI Diseases NCT06532110 | McMaster University | — |
| Completed | Effect of 15g Daily Consumption of NUTRIOSE on Healthy Volunteers Microbiota. NCT01897649 | Nealth Sarl | Phase 1 |
| Unknown | Intestinal Microbiota Composition After Antibiotic Treatment in Early Life NCT02536560 | Agentschap NL | — |
| Completed | Mixture of Prebiotics on Intestinal Microbiota of Patients Receiving Abdominal Radiotherapy. NCT01549782 | Hospital General Universitario Gregorio Marañon | N/A |
| Withdrawn | Maternal and Neonatal Microbiome NCT02891746 | Hadassah Medical Organization | — |