| Recruiting | Impact of Internal Menstrual Protections on Immunity and Vaginal Microbiota NCT07199998 | Centre National de la Recherche Scientifique, France | — |
| Not Yet Recruiting | Gut Microbiome in Gynecological Cancer Patients With Pelvic Toxicity: Controls Versus Ozone Treatment. (MicrOz NCT07259681 | Bernardino Clavo, MD, PhD | — |
| 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 |
| Recruiting | BioAmicus Complete for Functional Gastrointestinal Symptoms in Infants Aged 0 to 24 Months NCT07148583 | Haiphong University of Medicine and Pharmacy | N/A |
| Active Not Recruiting | The Effect of Glucomannan Powder on Improving Gut Microbiota. NCT07231003 | Taipei Medical University | N/A |
| Enrolling By Invitation | Probiotics in the Prevention of Recurrent Prosthetic Joint Infection of the Hip and Knee NCT06636669 | Boston Medical Center | Phase 4 |
| Recruiting | Prebiotic Effects of California Grapes on Gut Health and Cardiometabolic Health in Overweight Men and Women NCT06544954 | University of California, Davis | N/A |
| Recruiting | Association Between Fecal Microbiota Composition, Metabolite Concentrations, and Indoxyl Sulfate Levels NCT06877585 | Tungs' Taichung Metroharbour Hospital | — |
| Active Not Recruiting | The Influence of Probiotics on Metabolome and Heart Rate Variability in Heart Failure of Structure Heart Disea NCT06872320 | Chang Gung Memorial Hospital | N/A |
| Active Not Recruiting | Effect of Lentils and Chickpeas on Gut Microbiome and Metabolic Health NCT06914375 | Florida State University | N/A |
| Recruiting | Effect of Peanut Butter on Gut and Metabolic Health NCT06916936 | Florida State University | N/A |
| Recruiting | Impact of Dysbiosis-inducing Drugs on Effectivity of Immune Checkpoint Inhibitor in Non-small Cell Lung Cancer NCT07191171 | University Hospital, Strasbourg, France | — |
| Not Yet Recruiting | Impact of Probiotics on Gut Microbiome During Antibiotic Prophylaxis in Elective Orthopedic Surgery NCT06791993 | Acibadem Maslak Hospital | Phase 4 |
| Recruiting | Effects of Endocrine Disruptors on the Gut Microbiota and Assessment of Their Impact on Colorectal Cancer Deve NCT06809660 | Poitiers University Hospital | N/A |
| Completed | Effect of Gastrogenic Microbiota in FD NCT06760897 | Nanfang Hospital, Southern Medical University | N/A |
| Enrolling By Invitation | PRObiotics for KIdney Transplantation NCT06825117 | University Hospital, Udine, Italy | N/A |
| Recruiting | Effect of Watermelon on Gut and Cardiometabolic Health NCT06588218 | Florida State University | N/A |
| Active Not Recruiting | Microbiome Alterations With Xylitol (MAX) in Pregnancy NCT06329596 | Baylor College of Medicine | Phase 1 / Phase 2 |
| Recruiting | Fecal Microbiota Transplantation in Axial Spondyloarthritis NCT06451588 | University Hospital of North Norway | Phase 2 |
| Not Yet Recruiting | The MIND-GUT Digital Pilot Intervention Study NCT06374407 | University of Skövde | N/A |
| Recruiting | Alteration of Symbiosis Intestinal Microbiota on Patients With Anorexia Nervosa NCT05632497 | Assistance Publique - Hôpitaux de Paris | — |
| Completed | Moderate Continuous Versus High Interval Intensity Training on Gut Dysbiosis and GLP1 Hormone in IBS NCT06408610 | Cairo University | N/A |
| Recruiting | axSEND: Exploring Immune and Microbiota Effects of a Partial Enteral Nutrition Diet in Axial Spondyloarthritis NCT06460805 | NHS Greater Glasgow and Clyde | N/A |
| Completed | Microbiota and Lipedema Evaluation in Obese Patient Treated With Very Low Energy Ketogenic Vegan Therapy NCT07041684 | University of Roma La Sapienza | N/A |
| Terminated | Ex-vivo Evaluation of the Effect of 2 Probiotic Solutions (Lactibiane ATB and Lactibiane Enfant) and 5 Classes NCT06114303 | Larena SAS | — |
| Recruiting | Personalized GI Motility Responses to Diet NCT06386471 | University of Illinois at Urbana-Champaign | N/A |
| Recruiting | A Study of Healthy Microbiome, Healthy Mind NCT06020703 | Mayo Clinic | N/A |
| Recruiting | Prenatal Antibiotics and Breast Milk / Neonatal IgA NCT05813184 | Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico | — |
| Recruiting | Microbiome Metabolites and Alcohol in HIV to Reduce CVD RCT NCT05288790 | Vanderbilt University Medical Center | Phase 2 |
| Recruiting | Alcohol Misuse, Gut Microbial Dysbiosis and PrEP Care Continuum: Application and Efficacy of SBIRT Interventio NCT06005298 | Shirish S Barve | N/A |
| Active Not Recruiting | Evidence Based Probiotic Therapy of Proton Pump Inhibitor Induced Dysbiosis NCT05836155 | Medical University of Graz | N/A |
| Unknown | Cutaneous Microbiota Evolution in ICU Patients With CVC (ICMc) NCT06095076 | Centre Hospitalier de Cayenne | — |
| Completed | The Effect of Alpha-lactalbumin on Microbiota Composition NCT05674318 | Lo.Li.Pharma s.r.l | N/A |
| Completed | Bacterial Intestinal Gut Modification Around Cancer Surgery (BIG MACS) Diet NCT05658263 | University of Minnesota | EARLY_Phase 1 |
| Active Not Recruiting | Almonds to Improve Gut Health and Decrease Inflammation NCT05790564 | Oregon State University | N/A |
| Completed | Efficacy of a Probiotic and Microbiological Analysis on Oral Complications in Patients With HNC NCT06122636 | University of Barcelona | N/A |
| Active Not Recruiting | Oral Iron Supplementation for Patients With Chronic Kidney Disease NCT05544513 | Universidade Federal Fluminense | Phase 2 |
| Active Not Recruiting | My Baby Biome: Infant Stool Samples for Microbiome Health (MBB) NCT05472688 | Persephone Biosciences | — |
| Completed | Association of PeRiODontal Disease and gUt Microbiome With Coronary artEry Disease (PRODUCE Study) NCT05560087 | Yonsei University | — |
| Completed | Effect on Cytokines IL-1ß, TNF-α, IL-4, and Total Bacterial Load of a Composition Comprising Olive Oil, Trimet NCT06786910 | Mucosa Innovations, S.L. | N/A |
| Completed | Effect of Aerosol From THS and Cigarette Smoke on Periodontal Tissues and Its Microbiome NCT06480877 | Clinical Hospital Center Rijeka | — |
| Active Not Recruiting | REMBRANDT: REcovery of the MicroBiome fRom Antibiotics for Dental implanTs NCT05622721 | University of Pennsylvania | — |
| Unknown | Vegetarian Ketogenic Diet VS Omnivore Ketogenic Diet - Protocol of a Keto-vege Diet for Remission of Type 2 Di NCT05579561 | BloomedIn | N/A |
| Completed | Protective Role of Pre-/ Post-biotics on Gut Inflammation, Dysbiosis, and Life Quality in Rett Syndrome (Bioti NCT05420805 | Azienda Ospedaliera Universitaria Senese | N/A |
| Active Not Recruiting | Oral Microbiota Dysbiosis in IBD NCT06980818 | ULS Viseu Dão Lafões | — |
| Recruiting | Respiratory Dysbiosis in Preschool Children with Asthma: Predictive of a Severe Form NCT05192499 | University Hospital, Brest | N/A |
| Active Not Recruiting | Assessing Gut Microbiota Mediated Health Outcomes of Whole Wheat and Its Major Bioactive Components NCT05318183 | Ohio State University | N/A |
| Completed | Determination of Vaginal Colonization and the Effect of an Oral Probiotic (PROSALVAG) NCT05176535 | Fertypharm | N/A |
| Completed | Effect of Lecithin-based Curcuma and Boswellia on Post-acute COVID-19 IBS NCT06423586 | Azienda di Servizi alla Persona di Pavia | N/A |
| Completed | Impact of Teeth Brushing in Ventilated COVID-19 Patients. NCT05575050 | University Hospital in Krakow | N/A |
| Unknown | The Effect of Probiotics on Systemic Inflammation and Metabolic Endotoxemia in Patients Undergoing Bariatric S NCT05407090 | Medical University of Gdansk | N/A |
| Unknown | Analysis of Biliary Microbiota in Hepatobiliopancreatic Diseases Compared to Healthy People [MICROBILIO] NCT04391426 | University of Sao Paulo | — |
| Completed | Effect of Probiotics on Patients With Congenital Heart Disease Following Cardiopulmonary Bypass NCT06295575 | Nanjing Children's Hospital | N/A |
| Unknown | Periodontal Therapy on the Gut Microbiome of Inflammatory Bowel Disease NCT04790825 | University of Turin, Italy | N/A |
| Completed | Gut Microbial Changes After Periodontal Treatment NCT04982302 | University of Turin, Italy | — |
| Completed | Lifestyles, Arterial Aging and Intestinal Microbiota (MIVAS III Study) NCT04924907 | Instituto de Investigación Biomédica de Salamanca | — |
| Unknown | Analysis of Microbiota Variations in Industry Workers Working Different Shifts and Impact of a Nutritional Int NCT04918537 | Sophie Bucher Della Torre | N/A |
| Recruiting | Fecal Microbiota Transplantation by Oral Capsules for Hepatic Encephalopathy Treatment NCT06368895 | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | Phase 1 |
| Unknown | Effect of Probiotic on Gut Microbiome and Bacterial Translocation in Healthy Asian Volunteers NCT05083572 | Changi General Hospital | Phase 4 |
| Unknown | A Randomized Double Blinded Placebo Controlled Study on the Effects of Dietary Supplementation With a Probioti NCT04954846 | Ludwig-Maximilians - University of Munich | N/A |
| Completed | Carbohydrate-induced Resilience of the Gut Microbiome After Antibiotics Use NCT04561284 | Maastricht University Medical Center | N/A |
| Completed | Accelerated Genital Tract Aging in HIV: Estradiol Clinical Trial NCT04079218 | Kerry Murphy | Phase 4 |
| Withdrawn | Monitoring the Effects of Probiotic Supplementation in Immunocompromised Kidney Transplanted Subjects NCT05102461 | State University of New York - Upstate Medical University | N/A |
| Enrolling By Invitation | The Efficacy of 10-day and 14-day Bismuth-based Quadruple Therapy in First-line H. Pylori Eradication NCT04527055 | National Cheng-Kung University Hospital | Phase 4 |
| Completed | Vitamin D and Prebiotics for Intestinal Health in Cystic Fibrosis NCT04118010 | Emory University | Phase 4 |
| Completed | Assessment of the Impact of Type of Probiotic, Delivery Type and Feeding Type on Baby's Microbiota After Dysbi NCT04304014 | Fundacion Clinic per a la Recerca Biomédica | N/A |
| Completed | Interactions Between Skincare Product Ingredients and the Skin Microbiome NCT04476732 | University of California, Davis | N/A |
| Completed | Vaginal Probiotics and Pessaries and Their Impact on the Vaginal Microenvironment NCT04118049 | Hartford Hospital | N/A |
| Unknown | The Effect of Bariatric Procedures on Gut Microbiota in Obese Individuals in United Arab Emirates and Lebanon NCT04200521 | Zayed University | — |
| Completed | Gut-level Antiinflammatory Activities of Green Tea in Metabolic Syndrome NCT03973996 | Ohio State University | N/A |
| Unknown | Effects of Probiotic Supplementation in Hypertensive Women on Menopause NCT03955159 | Instituto de Cardiologia do Rio Grande do Sul | N/A |
| Completed | Investigation on the Efficacy of Oral Carnitine Challenge Test Based on a Gut Microbiota Functional Test NCT06175260 | National Taiwan University Hospital | — |
| Completed | Effect of Sporebiotics in FD NCT04030780 | Universitaire Ziekenhuizen KU Leuven | N/A |
| Completed | Intestinal Microbiota and Arterial Stiffness NCT03900338 | Fundacion para la Investigacion y Formacion en Ciencias de la Salud | — |
| Terminated | Fecal Microbiota Transplantation for Treatment of Gastrointestinal Dysbiosis or Clearance of ARO NCT03834051 | Vancouver Island Health Authority | N/A |
| Terminated | Safety and Efficacy of FMT in Individuals With One or More Recurrences of Clostridium Difficile Associated Dis NCT03548051 | National Institute of Allergy and Infectious Diseases (NIAID) | Phase 1 / Phase 2 |
| Completed | Alteration of Stool Microbiota in Preterm Infants With Anemia NCT03554278 | University of Texas Southwestern Medical Center | — |
| Completed | Prebiotic Effects of a Polyphenol-rich Food Product NCT03659240 | Iowa State University | N/A |
| Completed | Lactobacillus Reuteri DSM 17938 in Gut Microbiota Development in Infant Born by Caesarean Section NCT03675048 | BioGaia AB | N/A |
| Completed | How Reflux Medications Affect the Microbiome of Infants NCT03747991 | Nemours Children's Clinic | — |
| Withdrawn | SHIFT: Studying HIV Immunology After Fecal Transplant NCT03163784 | Massachusetts General Hospital | Phase 1 / Phase 2 |
| Completed | PPI and Microbiome in Healthy Volunteers and Functional Dyspepsia NCT03545243 | Universitaire Ziekenhuizen KU Leuven | Phase 4 |
| Completed | Influences of High-fiber, Organic Whole-food Formula on the Gut Microbiome in Critically Ill Children NCT03414775 | University of Pittsburgh | N/A |
| Completed | A Pilot Study Assessing Intestinal Microbiota Diversification and Changes After Travel to South(East) Asia Fro NCT03043300 | Emory University | — |
| Completed | Obesity-related Health Benefits of Apples NCT03523403 | University of Guelph | N/A |
| Completed | Interaction Between Immune Cells and Bacteria Associated With Periodontitis NCT03225950 | University of Copenhagen | — |
| Completed | Fecal Microbiota Transplantation and ACHIM for Manipulating Gut Microbiota in IBS Patients NCT05088434 | Haukeland University Hospital | N/A |