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Showing 1–24 of 36 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Synbiotic Clear all
Recruiting Not applicable Interventional

Terraflora Daily Care and Gastrointestinal Health

NCT07355634
View directory record Official record
Conditions
Gastrointestinal
Interventions
Synbiotic Dietary Supplement, Placebo
Dietary Supplement
Lead sponsor
OvationLab
Network
Eligibility
25 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Synbiotic Therapy for NP-PASC

NCT06620406
View directory record Official record
Conditions
Post-Acute COVID-19 Syndrome, Long COVID-19
Interventions
Synbiotic IVS-1, Maltodextrin
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced Sep 2, 2026, 4:13 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Human Milk Oligosaccharide-Based Synbiotic Supplement for Intestinal Microbiota Dysbiosis

NCT06615986
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Cardiosyn
Dietary Supplement
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 99 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Food Trial to Evaluate the Kinetics of the Medical Foods SBD111 and SBD121 Persistence in Healthy Adults

NCT06614166
View directory record Official record
Conditions
Product Persistence in GI Tract, Kinetics, Rheumatoid Arthritis (RA), Bone Density
Interventions
SBD111 Probiotic Medical Food, SBD121 Probiotic Medical Food
Other
Lead sponsor
Solarea Bio, Inc
Industry
Eligibility
18 Years to 64 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Waltham, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Sep 2, 2026, 4:13 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Synbiotic Dietary Supplement and Gut Microbiota

NCT04097106
View directory record Official record
Conditions
Healthy
Interventions
Synbiotic
Dietary Supplement
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 45 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 8, 2024 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Synbiotic Supplement on Metabolic & Cognitive Outcomes Among Older Adults

NCT06845995
View directory record Official record
Conditions
Older Adults, Bioelectrical Impedance, Appetite Hormones, Metabolic Health, Body Composition Measurement, Cognitive Health
Interventions
Synbiotic supplement
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
65 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Feb 24, 2025 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Commercially Available Synbiotic on the Gut Microbiome and Cardiometabolic Health

NCT07515443
View directory record Official record
Conditions
Hypertension, Gut Dysbiosis, Overweight , Obesity
Interventions
Synbiotic, Placebo
Dietary Supplement
Lead sponsor
Southern Utah University
Other
Eligibility
18 Years to 60 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Cedar, Utah
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Synbiotic to Attenuate Resorption of the Skeleton

NCT06389539
View directory record Official record
Conditions
Osteoporosis, Inflammation, Aging
Interventions
SBD111 medical food, Placebo
Other
Lead sponsor
Hebrew SeniorLife
Other
Eligibility
60 Years and older · Female only
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Roslindale, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Effects of Triphala and VSL#3 Probiotic Supplementation on Stool Microbiome Profiles and Inflammation

NCT03907501
View directory record Official record
Conditions
Human Microbiome
Interventions
Synbiotic, Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
65 Years and older
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional

The Effects of a High Protein Diet on Microbiota, Gastrointestinal Function and Wellness in Older Women

NCT02445560
View directory record Official record
Conditions
Aging
Interventions
Probiotic capsule and Fiber Sachet, Probiotic capsule and Placebo sachet, Placebo capsule and Fiber Sachet, Placebo capsule and Placebo sachet
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
65 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
2
States / cities
Gainesville, Florida • Ocala, Florida
Source: ClinicalTrials.gov public record
Updated Mar 28, 2018 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional

Randomized, Double-Blind Placebo-Controlled Trial to Assess Overall User Experience of a Synbiotic Vaginal Suppository

NCT06236893
View directory record Official record
Conditions
Vaginal Personal Care
Interventions
VH-01 vaginal suppository tablet, Placebo vaginal suppository tablet
Other
Lead sponsor
Seed Health
Industry
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated May 30, 2025 · Synced Sep 2, 2026, 4:13 PM EDT
Recruiting Phase 2 Interventional

5-strain Probiotic Formulation in HR-positive Breast Cancer Receiving Aromatase Inhibitor to Prevent Bone Loss

NCT07044310
View directory record Official record
Conditions
Anatomic Stage 0 Breast Cancer AJCC v8, Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Hormone Receptor-Positive Breast Carcinoma
Interventions
Biospecimen Collection, Bone Mineral Density Test, Questionnaire Administration, WBF-038
Procedure · Other · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of Synbiotics as Adjuvant to Influenza Vaccine in Elderly

NCT01304771
View directory record Official record
Conditions
Influenza
Interventions
Synbiotic AKSB
Biological
Lead sponsor
Mayo Clinic
Other
Eligibility
65 Years and older
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 19, 2012 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Phase 2 Interventional Results available

SH-DS01 on Fecal Metagenomic Stability

NCT04598295
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
DS-01
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Anti-anxiety Biotics for Breast Cancer Survivors

NCT04784182
View directory record Official record
Conditions
Anxiety Generalized, Breast Cancer Female
Interventions
probiotic plus prebiotic supplement, placebo
Dietary Supplement
Lead sponsor
Auburn University
Other
Eligibility
50 Years and older · Female only
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Auburn, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 23, 2023 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Mechanism of Microbiome-induced Insulin Resistance in Humans (Aim2)

NCT02127125
View directory record Official record
Conditions
Insulin Sensitivity
Interventions
Maltodextrin, Synbiotic, Sevelamer
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 65 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Sep 10, 2020 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Determine the Effect of Synbiotics in Patients With Pre-diabetes

NCT04428606
View directory record Official record
Conditions
PreDiabetes
Interventions
Metabolic Rheostat, Butyrate Ultra, Placebo
Dietary Supplement
Lead sponsor
Zhaoping Li
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 15, 2022 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Synbiotic on the Gut Microbiota and Adiposity-related Markers in Healthy Overweight Subjects

NCT02151825
View directory record Official record
Conditions
Gut Microbiota, Adiposity
Interventions
Synbiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Texas State University, San Marcos
Other
Eligibility
18 Years to 64 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
San Marcos, Texas
Source: ClinicalTrials.gov public record
Updated May 29, 2014 · Synced Sep 2, 2026, 4:13 PM EDT
Active, not recruiting Not applicable Interventional

Ritual Synbiotic+, a Dietary Supplement Designed to Impact Gastrointestinal Health, Mood, and Behavior in Women

NCT06834984
View directory record Official record
Conditions
Gastrointestinal Disease Symptoms
Interventions
Prebiotic, probiotic, postbiotic combination, Placebo
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
25 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating the Impact of Synbiotic Supplementation on Infants and Toddlers

NCT06746285
View directory record Official record
Conditions
Gastrointestinal Tolerance of Probiotics in Infants
Interventions
Synbiotic Supplement, Lactose (inactive placebo)
Dietary Supplement
Lead sponsor
Persephone Biosciences
Industry
Eligibility
2 Months to 24 Months
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Consumer Health Study Aims to Evaluate the Safety, Tolerability and Impact of ED02 Probiotic Supplement on Gastrointestinal Outcomes

NCT07423897
View directory record Official record
Conditions
Gastrointestinal, Gut Health
Interventions
Bifidobacterium pseudocatenulatum, Placebo
Dietary Supplement
Lead sponsor
Synbiotic Health
Industry
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Use of a Novel Synbiotic to Change Human Gut Bacteria and Improve Health in Obese Adults

NCT02355210
View directory record Official record
Conditions
Intestinal Microbiota and Barrier Function
Interventions
Bifidobacteria adolescentis BD1, Bifidobacteria animalis subsp. lactis BB-12, Bifidobacteria adolescentis BD1 and galactooligosaccharide, Bifidobacteria animalis subsp. lactis BB-12 and galactooligosaccharide, galactooligosaccharide, Placebo
Dietary Supplement
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 22, 2021 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

How Does a Synbiotic Supplement Affect Iron Status During Iron Repletion in Iron Depleted Female Athletes?

NCT03793959
View directory record Official record
Conditions
Iron-deficiency
Interventions
Synbiotic Supplement, Placebo
Dietary Supplement
Lead sponsor
Marywood University
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Scranton, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 3, 2019 · Synced Sep 2, 2026, 4:13 PM EDT
Completed Not applicable Interventional Results available

Effect of Milk Oligosaccharides and Bifidobacteria on the Intestinal Microflora of Children With Autism

NCT02086110
View directory record Official record
Conditions
Autism
Interventions
Synbiotic, Prebiotic
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
2 Years to 11 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 31, 2019 · Synced Sep 2, 2026, 4:13 PM EDT