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Showing 1–24 of 42 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Infant Gut Microbiome Clear all
Completed No phase listed Observational

Vitamin A, Stool Microbiota and Vaccine Response in Bangladeshi Infants

NCT02027610
View directory record Official record
Conditions
Vitamin A Deficiency
Interventions
Not listed
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
12 Months to 24 Months
Enrollment
258 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
2
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Nov 17, 2015 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Phase 4 Interventional Results available

Vitamin D and Prebiotics for Intestinal Health in Cystic Fibrosis

NCT04118010
View directory record Official record
Conditions
Cystic Fibrosis, Dysbiosis
Interventions
Vitamin D3, Placebo vitamin D3, Inulin, Placebo Inulin
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 6, 2024 · Synced Jul 22, 2026, 4:51 PM EDT
Recruiting Not applicable Interventional

The Influence of Feeding Source on the Gut Microbiome and Time to Full Feeds in Neonates With Congenital Gastrointestinal Pathologies

NCT06072976
View directory record Official record
Conditions
Gastrointestinal Complication, Intestinal Obstruction, Gastroschisis, Hirschsprung Disease, Omphalocele, Midgut Volvulus
Interventions
Standard of Care, Exclusive Human Milk
Dietary Supplement
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
0 Days to 55 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Phase 1 Interventional Results available

Intestinal Permeability in Preterm Infants

NCT01756040
View directory record Official record
Conditions
Prematurity, Intestinal Permeability
Interventions
Lactulose -rhamnose solution
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
Up to 4 Days
Enrollment
211 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 17, 2023 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional

A Growth and Hypoallergenicity Study of a New Formula for Infants With Cow Milk Allergy

NCT00664768
View directory record Official record
Conditions
Cow Milk Allergy
Interventions
Neocate Infant, new Neocate
Dietary Supplement
Lead sponsor
Nutricia North America
Industry
Eligibility
1 Day to 8 Months
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
22
States / cities
Chandler, Arizona • Tucson, Arizona • Bentonville, Arkansas + 18 more
Source: ClinicalTrials.gov public record
Updated Dec 8, 2020 · Synced Jul 22, 2026, 4:51 PM EDT
Recruiting Not applicable Interventional

Maternal Probiotic Supplementation for Improved Outcomes in Infants of Diabetic Mothers

NCT05467150
View directory record Official record
Conditions
Infant of Diabetic Mother
Interventions
Probiotic Supplement
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Human Milk and Infant Intestinal Microbiome Study

NCT03181269
View directory record Official record
Conditions
Breast Feeding, Human Microbiome
Interventions
Intervention education, Placebo Education
Other
Lead sponsor
University of Virginia
Other
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 20, 2018 · Synced Jul 22, 2026, 4:51 PM EDT
Completed No phase listed Observational

Microbiome, Antibiotics, and Growth Infant Cohort

NCT03001167
View directory record Official record
Conditions
Obesity, Childhood, Antibiotic Side Effect
Interventions
Not listed
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
Up to 96 Hours
Enrollment
509 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 11, 2024 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Blueberry Intake and Infant Gut Health

NCT05006989
View directory record Official record
Conditions
Infant Development
Interventions
Blueberry Powder, Placebo Powder
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
4 Months to 5 Months
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 29, 2025 · Synced Jul 22, 2026, 4:51 PM EDT
Completed No phase listed Observational Results available

Growth and Microbiome Development in Very Low Birth Weight Infants Fed Primarily Mother's Own Milk vs. Donor Human Milk

NCT02573779
View directory record Official record
Conditions
Infant, Very Low Birth Weight
Interventions
Observational - no intervention
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 3 Days
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
2
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 24, 2025 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Lactobacillus Rhamnosus GG (LGG) on Infant Colic

NCT01279265
View directory record Official record
Conditions
Colic, Inflammation
Interventions
Nutramigen with Enflora, Nutramigen A+
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
3 Weeks to 3 Months
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 10, 2015 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional

Effect of Curcumin on Gut Microbiota in IBS

NCT03568513
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Curcumin, Placebo
Dietary Supplement
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
10 Years to 18 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 20, 2021 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial Investigating if Antibiotic Use in the First 48 Hours of Life Adversely Impacts the Preterm Infant Microbiome

NCT02477423
View directory record Official record
Conditions
Premature Birth of Newborn, Enterocolitis, Necrotizing
Interventions
Ampicillin, Gentamicins, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
Up to 6 Hours
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 7, 2020 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Results available

Multisensory Early Oral Administration of Human Milk in Preterm Infants

NCT06230848
View directory record Official record
Conditions
Infant Development, Stress
Interventions
Multisensory Early Oral Administration of Human Milk (M-MILK)
Other
Lead sponsor
Loyola University
Other
Eligibility
0 Years to 1 Year
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Jul 22, 2026, 4:51 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Early Avocado Exposure on Development and the Gut Microbiome in American Hispanic Infants

NCT06876935
View directory record Official record
Conditions
Gut Microbiome, Neurocognitive Correlates of Eating Habits, Infant Growth
Interventions
Daily avocado
Other
Lead sponsor
Arizona State University
Other
Eligibility
3 Months to 6 Months
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced Jul 22, 2026, 4:51 PM EDT
Active, not recruiting Not applicable Interventional Results available

Early Protein Supplementation in Extremely Preterm Infants Fed Human Milk

NCT04325308
View directory record Official record
Conditions
Prematurity; Extreme, Feeding Disorder Neonatal, Breast Milk Expression, Growth Failure, Microbial Colonization
Interventions
Protein-enriched human milk diet, Usual human milk diet
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Day to 4 Days
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Jul 22, 2026, 4:51 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Flourish: Exploring the Early Infant Gut Microbiome

NCT07333482
View directory record Official record
Conditions
Microbiota, Gut Microbiome, Eczema, Microbiome
Interventions
Tailored Recommendations, Consult Call, Educational Email Series
Dietary Supplement · Behavioral
Lead sponsor
Seeding Inc
Industry
Eligibility
0 Months to 3 Months
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Feb 23, 2026 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Dietary Sodium Supplementation on Growth & Intestinal Microbiome

NCT05546814
View directory record Official record
Conditions
Preterm Birth
Interventions
Sodium algorithm
Procedure
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
25 Weeks to 30 Weeks
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 10, 2025 · Synced Jul 22, 2026, 4:51 PM EDT
Recruiting No phase listed Observational

Celiac Disease Genomic Environmental Microbiome and Metabolomic Study

NCT02061306
View directory record Official record
Conditions
Celiac Disease
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
Up to 6 Months
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Jul 22, 2026, 4:51 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Complementary Feeding on Infant Growth and Gut Health

NCT05012930
View directory record Official record
Conditions
Gut Microbiome, Linear Growth
Interventions
Baby Foods - Meat, Baby Foods - Dairy, Baby Foods - Plant, Foods from the home
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
4 Months to 60 Months
Enrollment
267 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Protein From Complementary Foods on Infant Growth, Body Composition and Gut Health

NCT02142647
View directory record Official record
Conditions
Infant Growth, Infant Body Fat, Infant Gut Microbiome
Interventions
a high-protein complementary diet with meat, a high-protein complementary diet with dairy
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
1 Month to 5 Months
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 9, 2019 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Not applicable Interventional

Oropharyngeal Administration of Mother's Colostrum for Premature Infants (NS-72393-360)

NCT02116699
View directory record Official record
Conditions
Infection, Enterocolitis, Necrotizing, Ventilator-associated Pneumonia
Interventions
oropharyngeal mother's milk, oropharyngeal sterile water
Other
Lead sponsor
Endeavor Health
Other
Eligibility
1 Day to 4 Days
Enrollment
260 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2022
U.S. locations
5
States / cities
Miami, Florida • Evanston, Illinois • Park Ridge, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2023 · Synced Jul 22, 2026, 4:51 PM EDT
Completed No phase listed Observational

Gastrointestinal Microbiome Influence on the Development of Bronchopulmonary Dysplasia

NCT03229967
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
16S rRNA stool microbiome sequencing.
Diagnostic Test
Lead sponsor
University of Tennessee
Other
Eligibility
0 Days to 7 Days
Enrollment
197 participants
Timeline
2017 – 2020
U.S. locations
2
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Jul 22, 2026, 4:51 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Impact of Oligosaccharides and Bifidobacteria on the Intestinal Microflora of Premature Infants

NCT00810160
View directory record Official record
Conditions
Fecal Microflora in the Formula Fed Premature Infant
Interventions
ProlactPlus, GOS galacto-oligosaccharides, Bifidobacterium infantis, Bifidobacterium animalis
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
Not listed
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 12, 2017 · Synced Jul 22, 2026, 4:51 PM EDT