Clinical trials
Supplementation clinical trials
Below are recruiting supplementation clinical trials, each written for real people, not researchers. We’re tracking 671 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06956612Recruiting
Dietary nitrate supplements and your oral health
This trial tests whether taking dietary nitrate supplements can improve oral health in healthy adults. It may help you understand how simple diet changes could support your mouth's natural defenses.
NewcastleAges 18–65 - NCT07039747RecruitingPhase 2
Can a dietary supplement help people with irritable bowel syndrome?
This trial is testing if a dietary supplement can reduce symptoms of irritable bowel syndrome (IBS). You might qualify if you have been diagnosed with IBS, have moderate to severe symptoms, and are between 18 and 75 years old.
Rouen, FranceAges 18–75 - NCT07036952Enrolling by invitation
Omega-3 for metabolic syndrome in PCOS
This trial tests if adding omega-3 supplements to standard care helps women with PCOS who also have metabolic syndrome. It may offer a natural way to improve associated health issues.
Dhaka, BsmmuAges 18–36 - NCT07038252Recruiting
Oral supplement effect on blood vessel health in obesity and hypertension
This trial tests whether an oral supplement made from special fats (called Specialized Pro-resolving Mediators) can help reduce blood vessel damage caused by inflammation in people with obesity and high blood pressure. If you have well-controlled high blood pressure and are obese, you may be able to join.
ParisAges 18–85 - NCT07033013Recruiting
Study of an oral supplement for menopause hot flashes
This study tests an oral product to see if it can help with menopause symptoms like hot flashes. It is for women aged 40–65 who still have a uterus and are not on hormone therapy.
San Francisco, CaliforniaAges 40–65 - NCT07024238Enrolling by invitation
Short-chain fatty acid supplement for kidney transplant patients
This study tests whether taking a short-chain fatty acid (a type of fiber-like substance) supplement can improve gut health in people who have had a kidney transplant. It may help keep the transplant working well.
Martin, SlovakiaAges 18 years+ - NCT07015411Recruiting
Neuro supplements for migraine prevention
This trial tests whether a combination of vitamins and supplements can help prevent migraines. It's for adults who have migraines often (at least 6 days per month) and want to try a non-drug option.
MechelenAges 18–75 - NCT07014371Recruiting
Comparing daily vs. every-other-day iron pills for iron deficiency anemia
This study compares taking iron pills every day versus every other day to treat iron deficiency anemia. The goal is to see which schedule is more effective and easier for patients.
BangkokAges 20 years+ - NCT06996171Recruiting
Magnesium and melatonin for insomnia in young adults
This trial compares two natural supplements—magnesium and a melatonin-like compound—to see which works better for helping young adults fall asleep and stay asleep. It is for people with primary insomnia (trouble sleeping without another medical cause).
Kharan, Punjab ProvinceAges 18–40 - 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+ - NCT06998823Recruiting
Probiotics during cancer therapy study
This study looks at how taking a probiotic supplement affects survival, treatment response, and gut bacteria in people undergoing cancer therapy. It may help you understand if adding probiotics can improve your treatment outcomes.
New Taipei CityAges 20 years+ - NCT07009691Recruiting
Hydrogen water for ME/CFS patients
This trial tests whether drinking hydrogen-rich water can improve heart rate variability (a measure of nervous system function) in people with ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome). The goal is to see if this simple intervention helps reduce symptoms.
Stony Brook, New YorkAges 18–65 - NCT07012161RecruitingEarly Phase 1
Vitamin D for fibroid symptoms in women with low vitamin D
This trial tests whether taking vitamin D3 can help reduce symptoms like heavy bleeding or pressure from uterine fibroids. It is for women who have fibroids and are also low in vitamin D.
Dhaka, SahabagAges 18–50 - NCT06997471RecruitingPhase 1
Safety of modified stem cell infusion with organ transplant
This early-phase trial tests whether it is safe to give a special type of stem cell transplant (with the naïve T cells removed and only memory T cells left) to people receiving organ transplants. It is for children getting intestine or lung transplants, and for children or adults getting kidney transplants.
Madrid, MadridAges birth+ - NCT06991296Recruiting
Omega-3 supplement study for adults with obesity
This study looks at how omega-3 supplements affect certain fats in the blood of adults with obesity. Researchers want to see if taking these supplements changes these fats in a helpful way.
Kannapolis, North CarolinaAges 45–60 - NCT06988462Recruiting
Bottarga supplement for metabolic health
This study tests a supplement called bottarga, made from fish eggs, to see if it improves cholesterol, blood sugar, or weight in people with metabolic problems like high cholesterol or prediabetes. It is a small pilot study for Massachusetts residents.
Sommerville, MassachusettsAges 18–60 - NCT06991855Recruiting
Nutritional supplements for muscle health in older adults
This trial tests if taking leucine and omega-3 fatty acids can improve muscle mass and strength in older adults with low muscle health. It looks at people who have lost muscle and strength or walk slowly.
Linkou DistrictAges 50–99 - NCT06653725RecruitingPhase 2
Ketone supplement study for hospitalized heart failure patients
This trial tests if a ketone supplement can help people hospitalized for acute heart failure. The supplement is given orally and aims to support the heart and energy levels during recovery.
AalborgAges 18 years+ - NCT05651347RecruitingPhase 3
Melatonin in pregnancy to protect babies with slow growth
This trial studies whether taking melatonin during pregnancy can help protect the baby’s brain and organs in cases of poor fetal growth. It focuses on pregnancies at a specific gestational age with signs that the placenta may not be working well.
Camperdown, New South WalesAges 18 years+ - NCT06971445Enrolling by invitation
Omega-3 supplements for pregnant women with HIV
This trial tests whether taking omega-3 supplements can improve pregnancy outcomes and reduce inflammation in pregnant women living with HIV who are on antiretroviral therapy. If you are between 20 and 29 weeks pregnant with a single baby, you may be eligible to join.
Mexico City, Mexico CityAges 18 years+ - NCT06968299Recruiting
Probiotic supplement for memory, sleep, and mood
This study tests a special probiotic supplement (ExoBDNF) to see if it can improve memory, thinking, sleep, and mood in healthy adults. You may be able to join if you are generally healthy and not taking probiotics.
TaipeiAges 18 years+ - NCT06964438Recruiting
Post-surgery electrical muscle stimulation study for colorectal or stomach cancer
This trial tests if using a mild electrical device on your legs after surgery can help you recover faster. It is for people with colorectal or stomach cancer who are having curative abdominal surgery.
Derby, DerbyshireAges 18 years+ - NCT06970925RecruitingEarly Phase 1
Iron supplement after heart surgery study
This trial tests whether a special iron supplement (Sucrosomial® Iron) helps patients recover from heart surgery better than standard care. It is for people who have low iron or anemia after their planned heart surgery.
Englewood, New JerseyAges 18 years+ - NCT06971224RecruitingPhase 2
Can a vitamin B3 supplement improve sleep?
This study tests whether a daily supplement called nicotinamide riboside (a form of vitamin B3) can improve sleep quality in healthy adults. If you are between 40 and 60 years old, have normal sleep, and are not taking sleep aids, you may be able to join.
BergenAges 40–60
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Common questions
- Are there clinical trials for supplementation?
- Yes. Clin2 currently lists 671 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.