Clinical trials
Microbiome, Human clinical trials
Below are recruiting microbiome, human clinical trials, each written for real people, not researchers. We’re tracking 18 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06870981Recruiting
Optimizing nutrition and milk in infants (Opti-NuM)
This study looks at stored information and samples from babies who were part of earlier MaxiMoM nutrition trials. It aims to learn more about how nutrition and milk feeding affect infant health.
Palo Alto, CaliforniaAges 1 hour–3 weeks - NCT06812091Recruiting
Study on microbiome in children
This study explores the role of the microbiome (the community of bacteria in our bodies) in children's health. It aims to develop new treatments for pediatric diseases.
SeoulAges Any age - NCT06738329Recruiting
How seaweed additive carrageenan affects gut bacteria
This study tests whether carrageenan, a seaweed-based food ingredient, changes the balance of bacteria in your gut. It could help us understand how common food additives affect digestion and overall health.
Reading, ReadingAges 18–55 - NCT06279065Recruiting
Gut bacteria and giant cell arteritis study
This trial looks at how the bacteria in your gut might affect giant cell arteritis, a condition that causes inflammation in blood vessels. It aims to help doctors better understand the disease.
Bonn, North Rhine-WestphaliaAges 18 years+ - NCT05670262Recruiting
Study vitamin D and gut bacteria in childhood allergies
This study looks at how gut bacteria (microbiome) and vitamin D levels in newborns may influence whether children develop allergies. It starts with newborn babies and aims to better understand what early factors could predict allergic diseases.
TaichungAges birth–1 year - NCT03437005RecruitingPhase 1
Testing how common skin creams change gut microbes
This study looks at whether commonly used topical (skin) medications change your skin and gut microbial “ecosystem.” It’s an early (Phase 1) pilot study, mainly to see how these treatments affect samples over time.
Sacramento, CaliforniaAges 18 years+ - NCT07316465Recruiting
Tracking immune markers in newborns at risk for eczema
This study follows newborns for two years to see how their immune system develops, especially if they have a family history of eczema, asthma, or hay fever. Researchers want to learn if certain immune markers appear early in babies who later develop eczema.
Jette, Brussels CapitalAges 1 hour–2 years - NCT01933620Enrolling by invitation
NIH study of the microbiome using stored body samples
This study looks at the community of microbes in the body (your “microbiome”) using samples like stool, urine, and possibly tissue. It may help researchers understand how these microbes relate to health in hospital patients.
Bethesda, MarylandAges 2–120 - NCT06381882Enrolling by invitation
Human microbiome study after pancreatic surgery
This study looks at how tiny organisms in your gut (the microbiome) affect recovery after surgery for pancreatic cancer or related growths. It may help doctors understand how to improve outcomes for future patients.
NieuwegeinAges 18 years+ - NCT05795257Recruiting
Studying lung immune cells and gut microbes in ARDS
This trial studies how immune cells in the lungs and gut microbes (your microbiome) change during ARDS and how these changes relate to your outcomes. It may help researchers better predict and treat ARDS by learning what’s going on in the lungs and body systems.
HvidovreAges 18 years+ - NCT06117930Recruiting
Brain tumor and gut bacteria study
This study looks at how the bacteria in your gut might be linked to brain tumors. Researchers want to collect samples (like stool and tissue) during brain surgery to better understand this connection.
Jacksonville, FloridaAges 18 years+ - NCT05640700Recruiting
Study of vaginal microbiome in HPV-related early cell changes
This study looks at the vaginal “microbiome” (the normal germs and bacteria in the vagina) in people who have had abnormal Pap smear or colposcopy results related to HPV. It may help doctors understand what to monitor and how to better identify early, pre-cancer changes in the cervix.
JerusalemAges 25–70 - NCT06926166Recruiting
Genes and germs in early life study
This study looks at how genes and tiny organisms in your body (microbiota) affect early childhood development. It involves storing blood and stool samples from you and your child to help researchers learn more.
GuangzhouAges Any age - NCT06177184Recruiting
Donor milk for full-term cesarean-born babies
This study tests whether giving donor breast milk to full-term babies born by C-section can improve their gut health. If your baby was born by C-section and you plan to breastfeed, this trial may be a good fit.
Calgary, AlbertaAges 9 months+ - NCT05357170Recruiting
Testing gut bacteria changes after severe ICU illnesses
This study looks at changes in the microbiome (gut bacteria) in adults after serious ICU illnesses like sepsis, major trauma, or open heart/abdominal surgery. It may help researchers understand why recovery can be harder in some people and guide future treatments.
Gainesville, FloridaAges 18–110 - NCT02890342Recruiting
Studying Propionic Acidemia, gut bacteria, and body chemistry over time
This study follows people with propionic acidemia to better understand how the body, diet, gut bacteria, and blood chemistry change over time. It may help researchers learn more about the condition and how pregnancy, transplant, and daily life affect health.
Bethesda, MarylandAges 1 month–100 years - NCT05353504Recruiting
Testing how gut changes affect food choices
This study looks at whether interventions that change your gut bacteria can change how you decide what to eat. It may help researchers understand the gut–brain link behind eating behavior.
LeipzigAges 18–60 - NCT06072976Recruiting
How feeding affects gut health in babies with bowel conditions
This study looks at whether breast milk or formula helps babies with certain bowel problems heal faster and reach full feeds sooner. It compares how different milk affects the bacteria in a baby's gut.
Seattle, WashingtonAges birth–55 years
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Common questions
- Are there clinical trials for microbiome, human?
- Yes. Clin2 currently lists 18 recruiting microbiome, human studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a microbiome, human trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a microbiome, human trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.