Clinical trials
Dietary Supplement clinical trials
Below are recruiting dietary supplement clinical trials, each written for real people, not researchers. We’re tracking 98 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06055894Recruiting
Plant-based diet and supplements for smoldering myeloma or MGUS
This study tests whether a plant-based diet and certain supplements can help people with smoldering multiple myeloma (SMM) or monoclonal gammopathy of undetermined significance (MGUS). Participants will learn to cook plant-based recipes and track their meals using a phone app.
Basking Ridge, New JerseyAges 18 years+ - NCT05919940Recruiting
Testing a muscle stimulation and extra protein plan in ICU patients
This trial tests whether electrical muscle stimulation plus extra protein (protein substitute) can improve muscle health and metabolism in critically ill adults in the ICU. If you’re newly admitted and expected to stay on a breathing machine for several days, it may help you keep more muscle strength during recovery.
Vienna, State of ViennaAges 18 years+ - NCT05040204RecruitingPhase 1
Test supplements to change how sugars attach to blood proteins
This early (Phase 1) study tests how adding specific dietary supplements affects “protein glycosylation,” which means how sugar molecules attach to proteins in your blood. It’s meant to see how the supplements change these blood measurements and whether the approach is tolerable in generally healthy adults.
Sacramento, CaliforniaAges 18–45 - NCT06989203Recruiting
Protein supplement study for body weight
This trial tests how protein supplements affect body weight in people who are either normal weight or overweight. The goal is to see if adding protein helps with weight management.
Hangzhou, ZhejiangAges 20–50 - NCT05643859Recruiting
Fiber supplement study for bowel health and gut bacteria
This study tests whether adding a dietary fiber supplement can change the bacteria in your colon (gut microbiome). You may be asked to take the fiber supplement during evaluation for a non-cancer rectal condition.
Portland, OregonAges 18 years+ - NCT07273630Recruiting
Protein supplement and drinking less fluid after pituitary surgery
This study tests whether a protein supplement combined with drinking less fluid can help keep sodium levels stable after pituitary surgery. It is designed for patients who are at risk of sodium imbalances after their operation.
BaselAges 18 years+ - NCT05067595RecruitingPhase 1
Fecal transplant and fiber for gut graft-versus-host disease
This study tests whether a fecal microbiota transplant (a procedure that puts healthy donor bacteria into your gut) combined with a dietary fiber supplement can help treat gut graft-versus-host disease, a common complication after a stem cell transplant. It may help reduce diarrhea and other gut symptoms.
Seattle, WashingtonAges 18 years+ - NCT07864662Recruiting
Food and vitamin D for healthy school children
This study tests if adding trout fish, cow milk with egg, and vitamin D to children's diets can improve their vitamin D levels, nutrition, and brain function. It is for healthy children aged 6-12 who go to certain schools in Pakistan.
Karachi, SindhAges 6–12 - NCT06918054RecruitingPhase 4
Liver protection for kids with leukemia
This trial tests if a medication can protect the liver during chemotherapy for children and teenagers newly diagnosed with acute lymphoblastic leukemia (ALL). It aims to reduce liver damage caused by treatment.
CairoAges 2–18 - NCT05700058Recruiting
Testing how different Super-whey doses affect muscle growth
This study checks how different doses of “Super-whey” influence muscle protein building in adults. It may help figure out the best whey dose for building muscle, especially in older adults.
DerbyAges 65–85 - NCT05380401Recruiting
DHA and ARA milk fats for very early preterm babies
This study looks at how adding two specific milk fats (DHA and ARA) through enteral feeding affects metabolism in very early preterm infants. It may help researchers understand what these nutrients do in babies born around 25–30 weeks gestation.
Los Angeles, CaliforniaAges Up to 8 months - NCT05911893Recruiting
High-calorie supplement for malnourished toddlers’ growth
This study looks at whether giving a high-calorie oral nutrition supplement helps children aged 1 to 3 years who are undernourished gain weight and grow. You may be eligible if your child has low growth measurements and takes in too few calories for their needs.
Hefei, AnhuiAges 1–3 - NCT07783646Recruiting
Nutritional supplements for school children to reduce hunger and improve focus
This study tests whether nutritional supplement packs can help reduce hunger and improve eating habits and concentration in school. If your child is in grades 3–9 and can get the supplements, they may benefit from better focus and nutrition during the school day.
Chiayi CityAges 9–15 - NCT07117110Recruiting
Tomato nutrient as a diet check marker
This trial tests whether lycopene, a nutrient found in tomatoes, can be used as a reliable marker to see if people are following a specific diet. It is looking for healthy men who do not have any tomato allergies or recent health changes.
RotterdamAges 18–75 - 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+ - 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+ - NCT07451496Recruiting
Personalized aging study with lifestyle and supplements
This study tests whether personalized lifestyle advice, supplements, and exercise can help slow aging and improve health. If you are a generally healthy adult aged 50–80 who is not currently exercising, you may be a good fit.
Singapore, SingaporeAges 50–80 - NCT07606872Enrolling by invitation
Testing a diabetes score to guide treatment reversal
This study tests a new scoring system to help people with type 2 diabetes understand their condition better and potentially reverse or improve it. You'll use a digital platform to track blood sugar, answer health questions, and have blood tests to see if the system helps guide your treatment plan.
Manchester, EnglandAges 18 years+ - NCT06773650Recruiting
Managing lactose intolerance with diet and enzyme supplements
This trial tests whether diet tracking and lactase enzyme supplements help people with lactose intolerance manage their symptoms. It uses an online survey to gather information.
MilanAges 18 years+ - NCT07148908Recruiting
Protein from animals vs. microbes: how your body uses it
This study compares how well your body uses protein from animal and microbial sources. It may help us understand which protein types are best for active, healthy adults.
Toronto, OntarioAges 18–45 - NCT06955975Recruiting
Pectin supplement for frailty in older adults
This study tests if daily pectin, a fiber found in fruits, can improve strength and health in older adults who are frail or pre-frail. It compares pectin to a placebo over time.
Nottingham, NottinghamAges 65 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+ - NCT06475807Recruiting
Dietary changes for people on immunotherapy for cancer
This study tests whether a change in diet can help people with early-stage melanoma or lung cancer who are receiving immunotherapy (a type of treatment that helps your immune system fight cancer). You will be asked to follow a diet, give blood and stool samples, and complete questionnaires to see how the diet affects your body and treatment.
Pittsburgh, PennsylvaniaAges 18 years+ - NCT07590804Recruiting
Plant-Based Diet Study for Blood Cell Cloning
This study tests whether eating more plant-based whole foods can help people with clonal hematopoiesis (a condition where blood cells grow from a single mutated cell). Researchers want to understand if dietary changes affect this condition and collect health information over time.
Basking Ridge, New JerseyAges 18 years+
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Common questions
- Are there clinical trials for dietary supplement?
- Yes. Clin2 currently lists 98 recruiting dietary supplement 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 dietary supplement 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 dietary supplement 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.