Clinical trials
Diet clinical trials
Below are recruiting diet clinical trials, each written for real people, not researchers. We’re tracking 651 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04119791Recruiting
Study whether wild rice improves heart health
This study looks at whether eating wild rice can improve cardiovascular (heart and blood vessel) health. It is testing this in generally healthy adults who fit specific health and lifestyle criteria.
Winnipeg, ManitobaAges 20–40 - NCT04141878Recruiting
Lifestyle program to help prevent dementia in adults with diabetes risk
This trial tests a structured lifestyle program (more activity and healthier eating) to help prevent or slow memory and thinking problems. It may be helpful if you’re older but not showing major memory impairment, and you can commit to weekly study activities for about 8 months.
Walnut Creek, CaliforniaAges 60 years+ - NCT04275453RecruitingPhase 1/Phase 2
Test diet vs ketone drinks to reach ketosis safely
This early-stage study compares how quickly and effectively a low-carbohydrate diet versus taking ketone supplements helps the heart use less sugar (measured with PET/CT scans). It also looks at how long it takes to reach a “ketosis” state, which may be helpful for metabolic health.
Philadelphia, PennsylvaniaAges 18 years+ - NCT04471506Recruiting
Breathing and walking program for hormonal and tumor markers
This study tests whether a combined program of interval aerobic training (alternate “hard/easy” exercise) and mindfulness breathing can improve hormone, metabolic (body chemistry/energy), and tumor marker measures in women after menopause. If you meet the criteria, you may benefit from structured activity and breathing techniques while researchers track health changes over time.
CairoAges 55–65 - NCT04547816RecruitingPhase 3
Non-surgical treatment for constipation-related prolapse in women
This study tests whether a non-surgical (“conservative”) approach can improve constipation-related bowel problems in women who have a mild-to-moderate rectal bulge from pelvic organ prolapse. It may help by addressing how the rectum and pelvic floor work during bowel movements.
MoscowAges 18–70 - NCT04590690Recruiting
Gut microbes and sex risks for kidney stones after weight surgery
This study looks at how gut bacteria (microbes), along with sex, may affect the chance of getting kidney stones after bariatric (weight-loss) surgery. It may help doctors understand who is at higher risk so prevention can be improved.
Chicago, IllinoisAges 18–130 - NCT04598022Recruiting
Study how diet affects the gut microbiome in new college students
This study looks at how different eating patterns (vegan, vegetarian, or omnivore) affect the bacteria in your gut over time. It may help researchers understand which diet patterns are linked to healthier gut function.
KielAges 18–25 - NCT04607096Recruiting
Intermittent fasting to improve insulin in prediabetes or early type 2
This study tests whether intermittent fasting can improve how your body releases and uses insulin if you have prediabetes or early type 2 diabetes. It may help your blood sugar control without using insulin.
BerlinAges 18–70 - NCT04666727Recruiting
Diet and gut microbiome study during screening colonoscopy
This study looks at how a person’s diet (vegetarian vs. omnivorous) affects the germs in the gut and related stool and tissue samples. You may be able to join if you’re getting a screening colonoscopy and meet lifestyle and medication requirements.
Houston, TexasAges 45 years+ - NCT04672863Recruiting
Mediterranean diet after a first liver transplant
This study tests whether eating a Mediterranean-style diet after a first liver transplant is safe and helpful for recovery or health. It targets adults who are able to follow a nutrition plan and do not have certain complications or conditions that could interfere with diet changes.
Rochester, MinnesotaAges 18 years+ - NCT04777656RecruitingPhase 3
Crohn’s exclusion diet plus usual care for kids
This study tests whether a specific “exclusion diet” (removing certain foods) added to standard treatment can better control unstable Crohn’s disease in children. It may help reduce inflammation and flare-ups when symptoms are not controlled by usual medicines.
BronAges 6–17 - NCT04896281Recruiting
Phenylalanine-free diet study for ICU adults with high phenylalanine
This study tests whether a phenylalanine-free diet is helpful for ICU patients with high phenylalanine levels in the blood. It aims to see if changing diet in critically ill adults can improve outcomes during their ICU stay.
KeelungAges 20 years+ - NCT04965545Recruiting
Tests for diagnosing Wilson disease using special lab findings
This trial is for people who already have a genetic diagnosis of Wilson disease. It looks at whether specific lab tests and a physical eye finding can help confirm and support the diagnosis.
Hangzhou, ZhejiangAges 6–65 - NCT04970446RecruitingPhase 1/Phase 2
Fecal transplant to restore gut microbes in Crohn’s
This Phase 1/2 study tests whether a fecal microbiome transplant (FMT) can reduce active inflammation in people with Crohn’s disease. It’s designed for people who currently have signs of active bowel inflammation and can attend regular procedure visits.
Melbourne, VictoriaAges 18–70 - NCT04985630Recruiting
Check whether Urolithin A can be measured from blood spots
This study tests whether a substance called urolithin A can be detected using dried blood spots (small samples on a card). It also checks whether people can safely take the study product and complete questionnaires during the study.
San Francisco, CaliforniaAges 18–80 - NCT05057598Recruiting
Online study for women with breast cancer experiences
This study asks women with breast cancer to take part in an online, before-and-after research project. It may help researchers understand your experiences and improve support for people living with breast cancer, including those with relapse or spread to other parts of the body.
Milan, MIAges 18–90 - NCT05088863Recruiting
Diet survey about how health label messages change eating
This study looks at how people change (or don’t change) what they eat after seeing health-related messages. You may be asked to provide consent, follow study instructions, and try a specific food item for the survey.
Winnipeg, ManitobaAges 18 years+ - NCT05180578Recruiting
Goat milk protein study for children with milk-triggered esophagus inflammation
This trial tests whether goat milk protein is tolerated and safe for kids with eosinophilic esophagitis (EoE) whose symptoms improve when cow milk is stopped and come back when cow milk is added again. It may help some families find an alternative to cow milk, but you must meet specific “milk trigger” and allergy-safety requirements.
JerusalemAges Up to 18 years - NCT05196763Recruiting
Nutrition lessons for Indiana families on SNAP-Ed timing
This study tests nutrition education for families with children who receive SNAP (food assistance). It aims to see how to better support food security and healthy eating by planning SNAP-Ed lessons and participation over about one year.
West Lafayette, IndianaAges 5 years+ - NCT05216042Recruiting
Study of genetics and heart/metabolic health in adults
This study looks at how genetic markers (DNA) relate to heart health and “metabolic” health (how your body manages sugar and fat). You may be asked to provide genetic samples and follow study health checks and protocols to help researchers understand who is at higher risk.
Birmingham, AlabamaAges 18 years+ - NCT05235464Recruiting
Testing a high-protein diet for heart plaque risk
This study checks whether eating more protein affects atherosclerosis, which is plaque buildup in artery walls. It may help researchers understand if a high-protein approach changes health markers linked to heart disease.
Columbia, MissouriAges 45–75 - NCT05236374Recruiting
Daily beef in a heart-healthy diet to study zinc cells
This study tests whether eating daily beef as part of a heart-healthy diet changes how your body’s cells handle zinc, a mineral important for many functions. It’s designed for older adults and includes strict diet and medication rules to keep results accurate.
Davis, CaliforniaAges 55–70 - NCT05294367RecruitingEarly Phase 1
Magnesium by diet or skin lotion for people with lymphoma
This early study tests whether replacing magnesium—either by diet or a topical (skin) supplement—can improve safety or other health measures in people with lymphoma. It focuses on people who have a slightly low magnesium level and checks blood magnesium repeatedly during the study.
Rochester, MinnesotaAges 18 years+ - NCT05311436Recruiting
Nutrition program study for slum residents in Dhaka
This study tests a nutrition program for pregnant women, adolescent girls, and young children living in Dhaka slums. It is designed to support healthier nutrition during a key growth or pregnancy period.
Dhaka, Dhaka DivisionAges 1 day–39 years
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Common questions
- Are there clinical trials for diet?
- Yes. Clin2 currently lists 651 recruiting diet 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 diet 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 diet 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.