Clinical trials
Supplementation clinical trials
Below are recruiting supplementation clinical trials, each written for real people, not researchers. We’re tracking 675 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06022822RecruitingPhase 2
Urolithin A supplement before prostate cancer surgery
This trial tests whether taking a supplement called urolithin A for a few weeks before prostate removal surgery can help. The supplement comes from pomegranates and may slow cancer growth. You may qualify if you have prostate cancer, are planning surgery within 3-6 weeks, and have not had prior treatment like hormone therapy.
Los Angeles, CaliforniaAges 18 years+ - NCT07502924Recruiting
Testing Geranylgeraniol supplements for muscle health
This study tests whether taking a supplement called geranylgeraniol (GG) can improve muscle health. It is looking for physically active adults who are willing to follow specific dietary rules and avoid certain foods and supplements during the study.
Saint Charles, MissouriAges 30–60 - NCT07615777Recruiting
Nutritional supplements for midlife women's health symptoms
This study tests whether special nutritional supplements can help women aged 38–55 who are experiencing irregular periods or midlife symptoms like hot flushes, sleep problems, or mood changes. The goal is to see if these supplements improve overall health markers and how you feel.
Southampton, HampshireAges 38–55 - NCT07229014Recruiting
Collagen supplement for quality of life and appetite
This trial tests whether a daily collagen supplement can improve quality of life, appetite, and blood sugar control in overweight adults who feel low energy or have trouble sleeping. You will take the supplement, use a continuous glucose monitor, and complete online surveys.
London, LondonAges 18–65 - NCT06466408Recruiting
Enzyme supplement and exercise in older adults
This trial is testing if taking a fruit and vegetable enzyme supplement can help older adults recover better after short, intense exercise using video games. You would exercise and take the supplement to see how it affects your muscles, breathing, and blood.
TainanAges 65 years+ - NCT06433310RecruitingPhase 4
A dietary supplement's effect on gut fungi in healthy adults
This study tests whether a dietary supplement (L-phenylalanine) can affect the natural balance of fungi in the gut. Healthy volunteers take the supplement for a short time, and researchers check how it changes their gut fungi.
New York, New YorkAges 18 years+ - NCT06577285Recruiting
Botox for gummy smile with zinc and phytase supplements
This trial tests if taking zinc and phytase supplements can make Botox work better for treating a gummy smile. It may help people who show too much gum when they smile.
CairoAges 18–60 - NCT07388121Recruiting
Vitamin C and gut health in healthy adults
This trial tests whether taking vitamin C supplements changes the bacteria in your gut and how well your gut works. If you are a healthy adult, you may be able to join.
GlasgowAges 18–65 - NCT05067595RecruitingPhase 1
Fecal transplant plus fiber for gut graft-versus-host disease
This Phase 1 study tests whether a fecal microbiota transplant (a stool-based treatment from a screened donor) plus a dietary fiber supplement can improve gut symptoms after a bone marrow transplant. It is aimed at people with mild to severe gut graft-versus-host disease (GVHD).
Seattle, WashingtonAges 18 years+ - NCT07222787Recruiting
Testing a new spinal implant for lower back fusion
This trial tests a new spinal implant system (CORUS-LX) for fusing two lower back discs that are causing pain. It is meant for people with severe, long-lasting back or leg pain that hasn't improved with non-surgical treatments.
Scottsdale, ArizonaAges 18–80 - NCT04829136Recruiting
Oral fiber supplement during donor stem cell transplant
This trial tests whether taking a fiber supplement by mouth during a donor stem cell transplant helps patients tolerate treatment and potentially recover better. It’s specifically for adults who are planning a donor (allogeneic) transplant for blood cancers.
Seattle, WashingtonAges 18 years+ - NCT07273747Recruiting
Kelulut honey for eye allergy and dry eye
This study tests if Kelulut honey eye drops can help people with both allergic conjunctivitis (eye allergies) and dry eye symptoms. If you have been diagnosed with eye allergies and still have bothersome symptoms despite treatment, this trial may offer a natural option to explore.
Kota Bharu, KelantanAges 18–40 - NCT06906835Recruiting
Comparing two blood tests to guide iron treatment in dialysis patients
This trial tests whether a new blood test (reticulocyte hemoglobin) is better than the usual iron test (transferrin saturation) for guiding when to give iron to people on dialysis. If you have anemia (low red blood cells) from kidney disease, this study may help doctors find the best way to treat your iron levels.
Pathumwan, BangkokAges 18–80 - NCT06682221Enrolling by invitationPhase 3
Resistance training and supplement study for older adults
This study tests whether a resistance training program (like lifting weights) combined with a supplement can improve heart, lung, and metabolic health in older adults. The goal is to find ways to help seniors stay healthier and more active.
Anápolis, GoiásAges 60–85 - NCT07461233Recruiting
Gut Health and Synbiotics in Hemodialysis
This study tests whether taking a special mix of friendly bacteria and prebiotics (called synbiotics) can help improve gut health in people on hemodialysis. It may reduce inflammation and other complications related to kidney disease.
Taichung, Wuqi DistrictAges 18 years+ - NCT07046845Recruiting
Prenatal Vitamin Study: Special vs. Generic for Moms with Food Insecurity
This study compares a special prenatal vitamin (Perelel) with a standard generic prenatal vitamin. It looks at how each affects the health of moms and babies, especially for those who have trouble getting enough nutritious food.
Pittsburgh, PennsylvaniaAges 14 years+ - NCT07053657Recruiting
Vitamin D for heart health in overweight teens
This study looks at whether giving vitamin D can improve heart and metabolic health in overweight or obese teens who have low vitamin D levels. It may help lower risks like high blood sugar or cholesterol.
Anqing, AnhuiAges 10–16 - NCT07497347Recruiting
Amino acids and lifestyle for brain aging in older adults
This study tests whether taking a specific amino acid supplement, along with lifestyle changes, can help slow or improve brain aging in older adults who have mild depression. It aims to see if these nutrients can support brain health and mood.
BresciaAges 65–85 - NCT07263789Recruiting
Food supplement for better blood sugar
This study tests a food supplement to see if it helps keep blood sugar levels healthier in people with slightly high blood sugar (pre-diabetes). If you qualify, you would take the supplement and have your blood sugar checked over time.
Pavia, LombardyAges 18 years+ - NCT07177183Recruiting
Low creatinine as a sign of longer breathing tube use
This study looks at whether low blood creatinine levels can help predict which patients will need a breathing machine for a long time or have trouble coming off it. If you are under 18 and in a post-ICU care unit, you may be able to join.
BrnoAges 18 years+ - NCT07151105Recruiting
Vitamin C for gut health in adults with obesity
This trial tests whether taking vitamin C supplements helps improve gut barrier function in adults with obesity. You'll follow a low-fruit-and-vegetable diet for two, two-week periods.
Columbus, OhioAges 18–50 - NCT07743073Recruiting
Ceylon cinnamon for diabetic nerve pain
This study tests whether taking Ceylon cinnamon daily can help lower blood sugar, improve cholesterol, and reduce nerve pain in adults with type 2 diabetes and painful diabetic peripheral neuropathy. If you qualify, you might get a natural supplement that could ease your symptoms.
AmmanAges 18 years+ - NCT07730606RecruitingPhase 3
Sodium bicarbonate supplement study for female basketball players
This study tests if taking sodium bicarbonate (a common kitchen ingredient) can improve performance in female basketball players. It's designed for healthy athletes who train regularly.
PoznanAges 16–35 - NCT07622628Recruiting
AI-Guided Microbiome Nutrition for Better Blood Sugar Control
This trial tests whether a personalized nutrition plan based on your gut bacteria (microbiome) can help improve blood sugar control in type 2 diabetes. Researchers will use artificial intelligence to match you with a diet tailored to your unique gut bacteria.
IzmirAges 18–65
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Common questions
- Are there clinical trials for supplementation?
- Yes. Clin2 currently lists 675 recruiting supplementation 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 supplementation 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 supplementation 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.