Clinical trials
Supplementation clinical trials
Below are recruiting supplementation clinical trials, each written for real people, not researchers. We’re tracking 688 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07092930RecruitingPhase 3
Supplements for athletic performance and health
This trial tests if beta-alanine and sodium bicarbonate supplements can improve your physical performance and certain health markers. If you are a healthy, experienced athlete, this study might help you understand how these supplements affect your body.
Poznan, WielkopolskaAges 16–40 - NCT07773142Recruiting
Protein drink and exercise for muscle gain
This study looks at whether a special protein drink can help build muscle better than a placebo when combined with strength training. If you are a healthy young adult who is new to weight lifting, this trial may help you build muscle more effectively.
Birmingham, BirminghamAges 18–35 - NCT06835738Recruiting
Daily multivitamin for pregnant women in Uganda
This study is testing whether giving a daily multivitamin and mineral supplement to pregnant women in Uganda helps improve their health and their baby's health. It is comparing this new approach to the current standard of care.
LyantondeAges birth–80 years - NCT06481852RecruitingPhase 1
Gut bacteria transplant for pulmonary arterial hypertension
This trial tests whether a special combination of antibiotics, fecal transplant (gut bacteria from healthy donors), and a fiber supplement can help people with pulmonary arterial hypertension (PAH). It aims to see if improving gut health can improve PAH symptoms and overall well-being.
Minneapolis, MinnesotaAges 18–75 - NCT06079918RecruitingPhase 3
Vitamins and minerals for pregnancy anemia prevention
This trial tests whether taking a daily multivitamin and mineral supplement during pregnancy can prevent anemia in mothers living in Tanzania. If you are pregnant, under 20 weeks along, and at least 18 years old, you may be able to join.
Dar es SalaamAges 18 years+ - NCT07303543Recruiting
Protein and exercise to prevent muscle loss after weight-loss surgery
This trial tests whether taking protein-collagen supplements and doing resistance exercises can help people maintain muscle after bariatric surgery. It may be a good fit if you are between 20 and 50 years old, have a BMI of 35 or higher, and are not pregnant or in menopause.
Istanbul, FatihAges 20–50 - NCT07504068Recruiting
Exercise and supplement for metabolic health in overweight adults
This trial tests whether a combination of physical exercise and a nutritional supplement can improve body composition, metabolism, and overall health in adults who are overweight and have early signs of metabolic problems. It may help you if you are looking for a non-drug approach to boost your health.
Valencia, ValenciaAges 50–65 - NCT07634133Enrolling by invitation
Omega-3 fatty acids and red blood cell health in active men
This study tests whether omega-3 supplements (healthy fats found in fish) change the structure of your red blood cells in ways that might improve how your body works. You'll take supplements for several weeks while researchers measure changes in your blood.
KatowiceAges 18–60 - NCT06674122Enrolling by invitation
Vitamin D supplements for preterm babies
This trial tests whether giving preterm babies (born at 28-34 weeks) a higher dose of vitamin D by mouth helps them grow and stay healthy. It may be an option if your baby is already feeding well and doesn't have certain other health problems.
Jakarta, Central JakartaAges 6 months–8 months - NCT07203144RecruitingPhase 2
Selenium for depression in teens
This study tests whether taking selenium (a mineral found in some foods) can help improve depression symptoms in young people. Participants will take selenium supplements and have their mood and brain activity monitored over time.
Chongqing, Chongqing MunicipalityAges 12–18 - NCT07451951Recruiting
Preventing Malnutrition in Infants: Comparing Two Nutrient Supplement Amounts
This study tests whether a small or medium amount of a special nutrient supplement can help prevent malnutrition in babies 6–12 months old. It is for families already in a support program (BISP/BNP) and aims to find the best dose to keep children healthy.
Peshawar, Khyber PakhtunkhwaAges 6 months–8 months - NCT06568315RecruitingPhase 3
Calcium plus multivitamins for mother and baby
This study tests whether taking a daily multivitamin with calcium, in addition to standard prenatal vitamins, improves iron levels and health for you and your baby. You would switch from your usual iron folic acid pills to the study supplements.
OuagadougouAges 15 years+ - NCT06138106Recruiting
Nutritional supplement for collagen in young adults
This study tests a nutritional supplement designed to help your body make more collagen, which is important for skin, joints, and bones. It is for healthy young adults to see if the supplement can safely boost collagen production.
Davis, CaliforniaAges 18–30 - NCT05782829Recruiting
L-tyrosine to reduce stress during outpatient hernia surgery
This trial studies whether an L-tyrosine supplement before surgery can reduce stress or anxiety around the time of anesthesia and recovery. It is for adults having outpatient surgery for an inguinal hernia under general anesthesia.
MonacoAges 18–75 - NCT05967507Recruiting
Testing oxygen flow during infant airway tube placement
This trial studies how different oxygen flow rates affect breathing during the process of placing a breathing tube in babies. It may help clinicians choose safer oxygen settings during routine and urgent (but not life-threatening) airway management.
Philadelphia, PennsylvaniaAges Up to 12 months - NCT05859126Enrolling by invitation
Choline supplement study on teens’ learning and thinking
This study follows children of mothers who previously took a choline supplement, and it tests how those children think and learn when they reach age 13. It looks at whether earlier choline intake during pregnancy is linked to better or different thinking skills in adolescence.
Ithaca, New YorkAges 13–13 - NCT06837298Recruiting
Fava bean extract supplement for muscle recovery
This trial tests whether a supplement made from fava bean protein can help your muscles recover strength after exercise. You would take the supplement for about 2 weeks and have your muscle function tested before and after.
Bradenton, FloridaAges 18–45 - NCT07251296Recruiting
Exercise and supplement study for menopausal women
This study tests whether a program of functional exercise combined with a nutritional supplement can help improve symptoms like hot flashes, sleep, and mood in women going through menopause. It may be a good fit if you are between 45 and 65, have moderate menopause symptoms, are not very active, and are not using hormone therapy or certain medications.
Valencia, ValenciaAges 45–65 - NCT06773000Recruiting
Nutritional supplement study for hip fracture recovery in older adults
This trial tests whether a nutritional supplement can help older adults recover better after hip fracture surgery. It may improve strength and healing during the recovery period.
New York, New YorkAges 65 years+ - NCT06391957Recruiting
Spirulina for recovery after hard exercise
This trial tests if taking a spirulina supplement helps your muscles recover faster after a tough workout. You might join if you are healthy, exercise regularly, and don't do formal weightlifting.
ExeterAges 18–40 - NCT07057245Recruiting
Protein supplement and brain function in older adults
This study tests whether taking a daily protein supplement can improve how your brain works. It is for healthy older adults (ages 60–75) who are overweight but do not have diabetes or take certain medications.
Maastricht, LimburgAges 60–75 - NCT05708183Recruiting
Micronutrient supplements for pregnant women in Ethiopia
This study checks whether giving pregnant women multiple micronutrient (vitamin and mineral) supplements improves outcomes for mothers and babies. You may also be asked to participate during routine antenatal care visits in participating health facilities.
Ītang, Gambella RegionAges 15–49 - NCT06916208Recruiting
Capsinoid supplement study for obese teens
This study tests whether a supplement called capsinoid can help activate brown fat in teenagers with obesity. Brown fat is a type of body fat that burns calories, so this could be a new way to help with weight management.
Palavas-les-FlotsAges 11–18 - NCT06102044RecruitingPhase 3
Zinc for young infants with severe infection in Tanzania
This study tests whether giving zinc supplements to very young babies (under 2 months) with severe infections helps them recover better. It takes place in Tanzania and involves adding zinc to their regular care.
Dar es SalaamAges birth–2 months
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Common questions
- Are there clinical trials for supplementation?
- Yes. Clin2 currently lists 688 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.