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177 Microbiome Trials Near You

Power is an online platform that helps thousands of Microbiome patients discover FDA-reviewed trials every day. Every trial we feature meets safety and ethical standards, giving patients an easy way to discover promising new treatments in the research stage.

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No Placebo
Highly Paid
Stay on Current Meds
Pivotal Trials (Near Approval)
Breakthrough Medication

Goji Berries vs. Fiber for Age-Related Macular Degeneration

Sacramento, California
The goal of this project is to conduct a clinical trial in 60 participants ranging from age 65-95 who are at risk for age-related macular degeneration (AMD). The study will evaluate the effects of 14g of goji berry intake or an equivalent amount and type of fiber, five days a week for six months, on visual health, gut microbiome profiles, skin carotenoid measures, and lipoprotein profiles.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:65 - 95

60 Participants Needed

Mediterranean Diet for Parkinson's Disease

Vancouver, British Columbia
The goal of this pilot study is to examine the feasibility and effects of an 18-month intervention diet compared to an active control diet (standard diet) in those living with Parkinson's Disease (PD), without dementia. Research has shown that eating components of Mediterranean diets are associated with a 30% lower risk to develop PD and a 40% lower mortality rate in those living with PD. Diet may influence the gut and microbiomes, thus may affect PD risk and progression. This study will examine how easy it will be to adhere to a certain type of diet for 18 months and what changes may occur in the gut microbiome and in PD symptoms on a specific diet during that time. The study will involve in-person study visits at UBC as well as online diet coaching sessions and online group cooking classes over Zoom. This is a randomized study, meaning that participants will be assigned by chance to either the Mediterranean-style diet group or the standard diet group for the duration of the 18 months. This pilot study will also examine recruitment rates and retention, in order to prepare for a larger future study.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:40 - 80

40 Participants Needed

Ketogenic Diet for Parkinson's Disease

Vancouver, British Columbia
Parkinson's Disease (PD) is the second most common neurodegenerative disorder with common gut-related symptoms, which are attributed to alterations in the gut microbiome - the collection of microorganisms that live within the gut. Classical ketogenic diets (KD) have shown to be beneficial in PD and non-PD populations but are associated with alterations in the gut microbiome that are characteristic of a perturbed system. This study aims to investigate the safety of modified Mediterranean-ketogenic interventions that are thought to be safer alternatives to the classical KD, as it relates to the gut microbiome health in patients with PD. We hypothesize that the modified Mediterranean-ketogenic interventions will not be associated with any significant perturbation of the gut microbiome in PD patients.
No Placebo Group

Trial Details

Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:45 - 85

50 Participants Needed

Lifestyle Changes for Healthy Aging

Vancouver, British Columbia
The Impact 360 study will evaluate the effects of a combined intervention of exercise, mindfulness, and nutrition on 8 key indicators of health and the mechanisms that drive these changes. 60 subjects aged 50 to 75 without a current diagnosis of a brain disorder will be recruited. This study will follow a partial crossover design. All participants will receive the intervention. Participants randomized into the intervention group after their baseline screening will receive the 6-month intervention. Those randomized into the waitlist group will complete another assessment at the end of the 6-month care as usual phase before receiving the intervention.
No Placebo Group

Trial Details

Trial Status:Recruiting
Age:50 - 75

60 Participants Needed

Fermented Vegetables for Gut Health

Davis, California
The purpose of this research is to determine the effect of fermented vegetable consumption on LAB abundance and tolerability of the intervention in young healthy people before conducting a full RCT with older participants.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 65

24 Participants Needed

Fresh vs Store-Bought Produce for Gut Microbiome

Eugene, Oregon
The purpose of this research is to explore what types of microbes are present on garden-fresh versus store-bought fruits and vegetables, as well as how they might affect the human gut microbiome.
No Placebo Group

Trial Details

Trial Status:Recruiting
Age:18 - 45

20 Participants Needed

Walnuts for Aging

Corvallis, Oregon
The purpose of this study is to examine the impact of daily consumption of walnuts for 12 weeks on cognitive function, markers of inflammation and oxidative stress, and the gut microbiome in healthy adults age 55 years and older.

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:55+

80 Participants Needed

Grapes for Gut and Heart Health

Davis, California
The goal of this clinical trial is to assess the impact of table grape consumption on gut microbiome, intestinal permeability, systemic inflammation, and vascular function in healthy overweight men and women aged 45-70 years. The main questions it aims to answer are: * Does daily grape intake alter intestinal microbiome composition and intestinal permeability? * Are changes in gut microbiota and intestinal permeability correlated with changes in cardiometabolic risk factors (inflammation, vascular function, lipid profiles)? * Does response to grape intake on gut microbiota, intestinal permeability, cardiometabolic and inflammatory markers differ between men and women? * Are metabolic pathways modified by grape consumption able to explain the link between gut health and cardiometabolic factors? Researchers will compare freeze-dried grape powder to placebo powder to see if grape powder improves cardiometabolic risk factors. Participants will * Consume the powder dissolved in water twice daily for 3 weeks * Follow their usual diet, modified to limit polyphenol-rich foods * Visit the clinic at the beginning and end of the intervention for vascular measurements and blood sample collection * Complete a 3-day 24-hour dietary recall and collect stool sample before each visit

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:45 - 70

40 Participants Needed

Dietary Fiber (Inulin) for Gut Health and Immune Response

Davis, California
The purpose of this study is to determine if adding dietary fiber, such as inulin, to a diet that does not have enough fiber would raise the levels of potentially beneficial bacteria, such as Bifidobacterium, in the gut. There is evidence to suggest that these microbes can affect gut health and immune response, including to vaccines. The investigators will examine how inulin in the diet (compared to the maltodextrin control) (1) causes changes in the composition and function of the gut microbes, (2) reduces gut inflammation and gut leakiness caused by the vaccine, (3) increases immune response to vaccination, and (4) changes the expression of important adhesion molecules on the surface of white blood cells. Intestinal and whole-body responses will be measured in all participants.

Trial Details

Trial Status:Recruiting
Trial Phase:Early Phase 1
Age:18 - 59

60 Participants Needed

Honey-Flavored Yogurt for Inflammation

Davis, California
A randomized, double-blind, crossover dietary intervention trial will test the effects of 4 weeks of daily honey-flavored yogurt intake on markers of inflammation (Th17 cytokines) and oxidative stress (NOX2, UA, RSNO) and associative changes with microbial derived metabolites (SCFAs, BAs, ellagitannins), metabolism and the fecal microbiome. The above suite of selected markers will capture diet-induced systemic changes in inflammation and oxidative stress, while assessing associated microbial changes.

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:45 - 65
Sex:Female

20 Participants Needed

Time-Restricted Eating for Cancer

Victoria, British Columbia
The goal of this clinical trial is to learn if time restricted eating (TRE), a form of intermittent fasting, can impact health outcomes in patients with chronic lymphocytic leukemia (CLL). The main questions it aims to answer are: * In patients with CLL, is there a decrease or stabilization in cancer cell counts associated with TRE compared to baseline? * Is there a decrease in immune cell autophagy (a cellular recycling process) activity associated with TRE compared to baseline? * Does adherence to a TRE regimen improve patient experience and quality of life? Immune cell autophagy activity in cancer patients will be compared to a subset of control participants without cancer. Participants will: * Adhere to a 16/8 fasting regimen, which involves eating as normal for 8 hours per day and fasting (only consuming water, black coffee or black tea) for the remaining 16 hours. They will follow this intervention for their choice of either 3 or 6 months. * Complete monthly blood collections * Complete weekly journal entries to record weekly weight and timing of first and last daily meals * Complete weekly safety check-ins with a study team member for the first 4 weeks of the study and then bi-weekly thereafter * Complete 3 quality of life questionnaires * Provide 3 stool samples (optional component of study) * Complete an end of study interview (optional component of study)
No Placebo Group

Trial Details

Trial Status:Not Yet Recruiting
Trial Phase:Phase 2

75 Participants Needed

High Arabinose Diet for Gut Bacteria

Davis, California
The FEEDMe Study is a single-group, open label pilot study exploring how diverse, commercially available foods rich in arabinose influence the gut microbiome in adults from diverse populations.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 50

48 Participants Needed

DGA Diet Patterns for Obesity

Davis, California
This trial will test different diets to see which one best helps people manage their weight and improve heart and metabolic health. Participants will follow various diets, and researchers will compare the results.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:35 - 64
Sex:Female

123 Participants Needed

Broccoli Sprouts for Healthy Eating

Corvallis, Oregon
The purpose of this project is to study the molecular and metabolic profiles in human plasma, urine and microbiome composition following the consumption of broccoli sprouts.

Trial Details

Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 60

83 Participants Needed

Whole Foods Plant-Based Diet for Cancer Prevention in Firefighters

Palo Alto, California
Investigators hope to learn about potential dietary intervention strategies (specifically a whole-food, plant-based diet) that may help lower cancer markers in firefighters.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased

120 Participants Needed

Diet Intervention for Pregnancy Microbiome

Stanford, California
The purpose of the study is to learn how different dietary interventions affect microbiota diversity in pregnant women and the transmission of microbiota to their infants during pregnancy, birth, and postpartum.
No Placebo Group

Trial Details

Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 50
Sex:Female

135 Participants Needed

Dietary Interventions for Insulin Resistance

Stanford, California
This 12-week controlled diet and weight intervention study seeks to define the molecular pathways that link excess body weight to the development of insulin resistance (IR). Blood, adipose and stool are sampled at three timepoints; baseline, peak weight (4 weeks) and post weight loss to monitor changes in cellular processes. Additionally, direct insulin sensitivity testing, and radiological measurement of visceral fat and intrahepatic fat content is measured at three timepoints to correlate clinical indices with cellular changes.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased
Age:35 - 65

110 Participants Needed

Ketone Ester for Microbiome Health

San Francisco, California
The goal of this observational study is to learn if a ketone ester can improve the content of the gut microbiome. The main questions it aims to answer are: * Does a ketone ester reduce age-related signatures in the gut microbiome? * What changes occur in the gut microbiome after consuming a ketone ester? Participants will: * Take a ketone ester drink every day for seven (7) days * Collect and ship stool samples within seven (7) days before, during, and within seven (7) days after the study period * Measure their ketone levels with a urine strip every day after having the drink * Answer questions about their typical diet on a normal day * Record their symptoms, if any arise
No Placebo Group

Trial Details

Trial Status:Not Yet Recruiting
Trial Phase:Unphased
Age:18 - 40

20 Participants Needed

NisinZ® P for Oral Cancer

San Francisco, California
This is a study of oral nisin administration in patients with OSCC who are undergoing complete surgical resection surgery with or without adjuvant radiation/chemoradiation as part of their routine care at the University of California, San Francisco (UCSF).
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Phase 1, 2

40 Participants Needed

Cephalexin for Surgical Infection Prevention

San Francisco, California
This trial is studying whether giving antibiotics after breast reconstruction surgery can prevent infections. It focuses on patients who have had a mastectomy and are getting implants. The study aims to see if antibiotics make a difference in preventing infections.
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Phase 2
Sex:Female

200 Participants Needed

Why Other Patients Applied

"I was diagnosed with stage 4 pancreatic cancer three months ago, metastatic to my liver, and I have been receiving and responding well to chemotherapy. My blood work revealed that my tumor markers have gone from 2600 in the beginning to 173 as of now, even with the delay in treatment, they are not going up. CT Scans reveal they have been shrinking as well. However, chemo is seriously deteriorating my body. I have 4 more treatments to go in this 12 treatment cycle. I am just interested in learning about my other options, if any are available to me."

ID
Pancreatic Cancer PatientAge: 40

"I've been struggling with ADHD and anxiety since I was 9 years old. I'm currently 30. I really don't like how numb the medications make me feel. And especially now, that I've lost my grandma and my aunt 8 days apart, my anxiety has been even worse. So I'm trying to find something new."

FF
ADHD PatientAge: 31

"I have dealt with voice and vocal fold issues related to paralysis for over 12 years. This problem has negatively impacted virtually every facet of my life. I am an otherwise healthy 48 year old married father of 3 living. My youngest daughter is 12 and has never heard my real voice. I am now having breathing issues related to the paralysis as well as trouble swallowing some liquids. In my research I have seen some recent trials focused on helping people like me."

AG
Paralysis PatientAge: 50

"I changed my diet in 2020 and I’ve lost 95 pounds from my highest weight (283). I am 5’3”, female, and now 188. I still have a 33 BMI. I've been doing research on alternative approaches to continue my progress, which brought me here to consider clinical trials."

WR
Obesity PatientAge: 58

"My orthopedist recommended a half replacement of my right knee. I have had both hips replaced. Currently have arthritis in knee, shoulder, and thumb. I want to avoid surgery, and I'm open-minded about trying a trial before using surgery as a last resort."

HZ
Arthritis PatientAge: 78

Probiotic for Depression

San Francisco, California
This double-blind, placebo-controlled clinical trial will examine the effect of probiotic Visbiome on the brain and gut microbiome of individuals 15 to 24 years of age.

Trial Details

Trial Status:Recruiting
Trial Phase:Early Phase 1
Age:15 - 24

77 Participants Needed

Protein Powders for Nutrition

Calgary, Alberta
This study aims to understand how the Milk Protein Concentrate/Fast Protein (MCP/FP) investigational product (IP) compares to a control the Micellar Casein Isolate/Slow Protein (MCI/SP) product in healthy volunteers. It involves two phases where participants will try both products. The main goal is to measure the type and rate of amino acids quickly in the small intestine after consuming the protein products and how this relates to gastric emptying.
No Placebo Group

Trial Details

Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:20 - 55

20 Participants Needed

Fecal Transplant for C-diff Infection

Columbus, Ohio
C-diff infection often causes belly pain and diarrhea and can be very hard to treat with medicine. One of the possible reasons that C-diff infection is hard to treat is because there is too much "bad" bacteria in the colon. Investigators believe that putting more "good" bacteria into the colon will help fight the "bad" bacteria. We do this by doing a fecal (poop) transplant. Fecal transplant has been done at other hospitals, but not at Nationwide Children's Hospital. Since our Investigators have not done this before, this study will help us learn the best way to do the transplant. Investigators also believe this transplant might help improve symptoms for patients with C-diff.
No Placebo Group

Trial Details

Trial Status:Recruiting
Age:2 - 21

15 Participants Needed

GSK3882347 for Urinary Tract Infection (UTI)

Cincinnati, Ohio
This trial tests a new medication, GSK3882347, to treat urinary tract infections in adult women. The study will see if the medication can effectively clear the infection and check for any side effects. Participants will take the medication for a short period, and researchers will compare it to an existing treatment to ensure accurate results.

Trial Details

Trial Status:Recruiting
Sex:Female

122 Participants Needed

IV Bacteriophage Therapy for Cystic Fibrosis

Cleveland, Ohio
This is a phase 1b/2 study of a single dose of intravenous (IV) bacteriophage in males and non-pregnant females, at least 18 years old, diagnosed with Cystic Fibrosis (CF). This clinical trial is designed to assess the safety and microbiological activity of bacteriophage product Walter Reed Army Institute of Research- PAM-Cystic Fibrosis1 (WRAIR-PAM-CF1), directed at Pseudomonas aeruginosa in clinically stable CF individuals chronically colonized with P. aeruginosa. WRAIR-PAM-CF1 is a 4 component anti-pseudomonal bacteriophage mixture containing between 4 x 10\^7 and 4 x 10\^9 Plaque Forming Units (PFU) of bacteriophage. Enrollment will occur at up to 20 clinical sites in the United States. In stage 1, two eligible subjects will be assigned to each of the three dosing arms receiving a single dosage of the IV bacteriophage therapy (4 x 10\^7 PFU, 4 x 10\^8 PFU, and 4 x 10\^9 PFU; total of 6 sentinel subjects), followed by 30 plus or minus 7 days observation period. If no Serious Adverse Events (SAEs)(related to the study product) are identified during the 96 hours after bacteriophage administration for all Sentinel Subjects in Stage 1, the study will proceed to Stage 2. In Stage 2a, 32 subjects will be enrolled into one of 4 arms (placebo IV, 4 x 10\^7 PFU, 4 x 10\^8 PFU, and 4 x 10\^9 PFU) in a 1:1:1:1 allocation. An interim analysis will be performed after all subjects have completed follow up visit 5 on Day 8+3 to select the IV bacteriophage dose with the most favorable safety and microbiological activity profile. During Stage 2b, subjects will be randomized into the bacteriophage (dose selected based on Interim Analysis following Stage 2a) or placebo arm. The final sample size is expected to be up to 72 subjects total with up to 25 subjects in the placebo arm and up to 25 subjects in the Stage 2b bacteriophage dose.

Trial Details

Trial Status:Active Not Recruiting
Trial Phase:Phase 1, 2

73 Participants Needed

RBX2660 for C. Diff Infection

Cleveland, Ohio
This trial will be initiated to explore whether RBX2660 (REBYOTA®) could be suitable for administration by the practice of colonoscopy. More specifically, the purpose of this trial is to explore the safety and clinical effectiveness of RBX2660 when delivered by colonoscopy to adults with rCDI. The experience of physicians will be documented through a physician-experience questionnaire to explore the usability of RBX2660 in clinical practice for colonoscopic administration. Furthermore, to explore the patient-experience of RBX2660 treatment, each trial participant will be offered to undergo a structured interview.
No Placebo Group
Pivotal Trial (Near Approval)

Trial Details

Trial Status:Active Not Recruiting

41 Participants Needed

Dietary Interventions for Cancer

Pittsburgh, Pennsylvania
This pilot trial will study the potential impact of two distinct dietary interventions with sequential use of high-fermented foods and high-fiber supplements on the gut microbiome and antitumor immunity in patients with melanoma and non-small cell lung cancer (NSCLC) treated with immune checkpoint inhibitors. The trial aims to understand how dietary changes affect the composition and function of the gut microbiome, together with immunological and metabolomic markers in serum in patients with melanoma and NSCLC who are undergoing standard-of-care treatment with a PD-1/PD-L1 Inhibitors (neoadjuvant, adjuvant or consolidation)
No Placebo Group

Trial Details

Trial Status:Recruiting
Trial Phase:Unphased

60 Participants Needed

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Learn More About Trials
How Do Clinical Trials Work?Are Clinical Trials Safe?What Can I Expect During a Clinical Trial?

Frequently Asked Questions

How much do Microbiome clinical trials pay?

Each trial will compensate patients a different amount, but $50-100 for each visit is a fairly common range for Phase 2–4 trials (Phase 1 trials often pay substantially more). Further, most trials will cover the costs of a travel to-and-from the clinic.

How do Microbiome clinical trials work?

After a researcher reviews your profile, they may choose to invite you in to a screening appointment, where they'll determine if you meet 100% of the eligibility requirements. If you do, you'll be sorted into one of the treatment groups, and receive your study drug. For some trials, there is a chance you'll receive a placebo. Across Microbiome trials 30% of clinical trials have a placebo. Typically, you'll be required to check-in with the clinic every month or so. The average trial length for Microbiome is 12 months.

How do I participate in a study as a "healthy volunteer"?

Not all studies recruit healthy volunteers: usually, Phase 1 studies do. Participating as a healthy volunteer means you will go to a research facility several times over a few days or weeks to receive a dose of either the test treatment or a "placebo," which is a harmless substance that helps researchers compare results. You will have routine tests during these visits, and you'll be compensated for your time and travel, with the number of appointments and details varying by study.

What does the "phase" of a clinical trial mean?

The phase of a trial reveals what stage the drug is in to get approval for a specific condition. Phase 1 trials are the trials to collect safety data in humans. Phase 2 trials are those where the drug has some data showing safety in humans, but where further human data is needed on drug effectiveness. Phase 3 trials are in the final step before approval. The drug already has data showing both safety and effectiveness. As a general rule, Phase 3 trials are more promising than Phase 2, and Phase 2 trials are more promising than phase 1.

Do I need to be insured to participate in a Microbiome medical study?

Clinical trials are almost always free to participants, and so do not require insurance. The only exception here are trials focused on cancer, because only a small part of the typical treatment plan is actually experimental. For these cancer trials, participants typically need insurance to cover all the non-experimental components.

What are the newest Microbiome clinical trials?

Most recently, we added Probiotics for Gestational Diabetes, Ketone Ester for Microbiome Health and Iron Supplements for Iron Deficiency to the Power online platform.

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Probiotics for Gestational Diabetes

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