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Microbiome clinical trials
Every US clinical trial registered for Microbiome — phase mix, recruiting status, and the sponsors running them, straight from the NIH ClinicalTrials.gov registry.
13 US clinical trials · 4 currently recruiting
The research picture
Microbiome has 13 registered US clinical trials, 4 of them open to new participants right now — about 31% of the total.
- 4
- recruiting participants now
- 31%
- of trials open to enrollment
- 0
- in Phase 3–4 (later-stage)
- 3
- top sponsor: Stanford University
Counts reflect the public ClinicalTrials.gov registry as last mirrored by PlainTrial. Status and phase are reported by each study's sponsor. This is reference information, not medical advice.
Active & Recent Trials
The Role of Brain-Bone Marrow-Gut Interaction Following Major Trauma
University of Florida
NCT06606119
Flourish: Exploring the Early Infant Gut Microbiome
Seeding
NCT07333482
Effects of Cannabidiol and Tetrahydrocannabinol on Microbiome and Neuroinflammation in HIV
University of California, San Diego
NCT05514899
MOdification Of THe Early-Life Respiratory Microbiome Through Vaginal SEEDing
Vanderbilt University Medical Center
NCT05505110
Alterations of the Microbiome During Critical Illness With Short and Long Term Clinical Outcomes
University of Chicago
NCT04552834
Maternal & Offspring Microbiome Study
Stanford University
NCT05123612
IGNITE Firefighters' Health
Stanford University
NCT06567561
Infant Restore: Efficacy of Microbiome Analysis and Education
Seeding
NCT06424691
Alcoholic Liver Disease and the Gut Microbiome
University of California, Los Angeles
NCT05007470
Investigating the Detection of Bovine and Soy Proteins in Human Milk
University of Idaho
NCT04851340
Evaluation of Two Regimens, With Healthy Male and Female Babies, Ages 3-6 Months Old, Using Various Assessments.
Johnson & Johnson Consumer Inc. (J&JCI)
NCT03457857
SWAP-MEAT: Study With Appetizing Plant Food - Meat Eating Alternatives Trial
Stanford University
NCT03718988
Effect of Strawberry Consumption on the Microbiome
University of California, Los Angeles
NCT04217122
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 1 |
| Phase 2 | 1 |
Top Sponsors
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Reading the Microbiome Trial Landscape
ClinicalTrials.gov lists 13 US studies indexed under Microbiome, and 4 of those are currently open to recruitment — roughly 31% of the total volume on the registry. That ratio is a useful proxy for activity level: a high share of recruiting studies often signals that research interest is current and that new enrollment opportunities are appearing, while a low share typically means the field is dominated by completed or follow-up work where most participant spots have already been filled. These counts reflect the public registry only and include studies at every stage of design, so they should be read as an index of research attention rather than as a measure of treatment availability.
The phase distribution for Microbiome shows 0 late-stage studies (Phase 3 and Phase 4 combined) alongside 2 earlier-phase entries (Phase 1 through Phase 2). Phase 1 and Phase 2 studies focus on early safety signals, dosing, and preliminary effect, while Phase 3 studies are typically the larger efficacy and safety trials submitted toward regulatory review, and Phase 4 studies follow approved interventions in real-world use. A condition weighted toward later phases often reflects a mature research pipeline with several interventions already close to or past approval, whereas a heavier early-phase tilt suggests the field is still exploring new mechanisms and candidate approaches.
Top sponsor activity for Microbiome is led by Stanford University with 3 indexed trials, alongside 8 other organizations in the top contributor list. The list on this page surfaces up to 13 of the most relevant recent and active entries, ordered with recruiting studies first so practical options are visible. All figures are derived from the public ClinicalTrials.gov dataset maintained by the National Library of Medicine and are reproduced here for reference. Inclusion of a trial, sponsor, or intervention on this page is neither an endorsement nor a recommendation — eligibility, protocol changes, and site-level status can shift frequently, so always verify current details on ClinicalTrials.gov and consult a qualified healthcare provider before acting on anything you see here.
Frequently Asked Questions
How many clinical trials are there for Microbiome?
PlainTrial tracks 13 US clinical trials for Microbiome, of which 4 are currently recruiting participants. Data sourced from ClinicalTrials.gov.
How do I find a recruiting trial for Microbiome?
Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.
Is this data current?
Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.
Related
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.
Read our methodology — how this data is sourced, computed, and verified.
Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.