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
- NCT06971822Recruiting
Whey protein for muscle building in older adults
This study tests whether a special whey protein drink helps build muscle in older adults, both at rest and after exercise. It compares a leucine-enriched protein to regular protein to see which works better.
Derby, DerbyshireAges 65 years+ - NCT03885245RecruitingPhase 2
L-citrulline supplement for overweight adults with later-onset asthma
This Phase 2 trial tests whether adding L-citrulline can improve asthma control in overweight adults whose asthma started later in life. It compares your asthma symptoms and lung testing results to see if the supplement helps when asthma is already being treated.
Durham, North CarolinaAges 18–65 - 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+ - NCT06677359Recruiting
Creatine and exercise for older adults
This study tests whether a creatine supplement, taken with or without a gentle exercise program, can help older adults stay stronger and more independent. It's designed for people aged 75 and older who can still walk.
Pamplona, NavarreAges 75 years+ - NCT06946316Recruiting
Dairy or plant drinks for stronger bones with exercise
This trial compares dairy and plant-based drinks to see which is better for bone health when you also do resistance training. If you are a postmenopausal woman or a man 50 or older, you may join to help find out which drink helps bones most.
Saskatoon, SaskatchewanAges Any age - NCT06950125Recruiting
JUICE HA for age-related muscle loss
This trial tests a dietary supplement called JUICE HA to see if it helps improve muscle strength and function in older adults with age-related muscle loss (sarcopenia). If you qualify, you'll take the supplement and be monitored for any changes.
TaichungAges 65 years+ - NCT06946017Recruiting
Dairy protein and fiber supplement for gut health
This trial tests if a fermented dairy protein drink with added fiber can improve gut symptoms. It is for active people living in Phoenix who may have mild lactose issues.
Phoenix, ArizonaAges 18–50 - NCT05891886RecruitingEarly Phase 1
Testing supplemental oxygen for early blood clot in the lungs
This early-phase trial studies whether giving extra oxygen can help people with a recently diagnosed lung blood clot (pulmonary embolism). It mainly looks at people who have early symptoms and signs that the right side of the heart is under strain.
Boston, MassachusettsAges 18 years+ - NCT06936202Recruiting
Spirulina pill study for healthy adults
This study tests whether a supplement called spirulina (a type of algae) can improve mental health in healthy adults. You would take spirulina daily and have your mood and well-being checked over several weeks.
Phoenix, ArizonaAges 16–65 - NCT06930638RecruitingPhase 2
MitoQ and leg conditioning for stroke recovery
This study tests whether a supplement called MitoQ and a special leg-pumping technique can improve blood vessel health in people who had a stroke at least 6 months ago. It may help your body recover better after a stroke.
Milwaukee, WisconsinAges 18–85 - NCT06925880Recruiting
Can creatine help seniors recover strength after knee replacement?
This trial tests if taking creatine supplements can help people aged 65+ rebuild muscle mass and strength more quickly after total knee replacement surgery. Participants will take creatine during their standard outpatient rehab program.
Mataró, BarcelonaAges 65 years+ - NCT06928298Recruiting
A cognitive screening study for Spanish speakers aged 60+
This study tests a new, easy-to-use cognitive screening tool on an iPad for older adults who speak Spanish. It aims to help primary care doctors detect thinking or memory changes early.
Austin, TexasAges 60 years+ - NCT06919718Recruiting
Vitamin D supplements for new mothers in Idaho
This trial tests whether taking vitamin D supplements can improve mental health and change the nutrients in breast milk for mothers living in Idaho.
Coeur d'Alene, IdahoAges 18–64 - NCT06158152Recruiting
AM3 supplement for metabolic syndrome pilot study
This study tests an oral supplement called AM3 in people with metabolic syndrome. It looks at whether the supplement can help improve sugar and fat levels in the blood.
MadridAges 18–75 - NCT06895070Recruiting
Heart transplant study using a special preservation machine
This trial tests a special machine that preserves donor hearts for longer periods before transplant. It may help people waiting for a heart transplant who need a heart from a donor that may be older or has some heart risks.
La Jolla, CaliforniaAges 18 years+ - NCT06896240Recruiting
A smoothie supplement before and after knee revision surgery
This study tests whether drinking a special smoothie each day for 2 weeks before and after your knee revision surgery helps reduce inflammation and improve recovery. It is for people who have health conditions that cause inflammation, like diabetes or heart disease, and who are getting a knee replacement.
New York, New YorkAges 40–80 - NCT06870331Recruiting
Probiotics for stomach health after spinal cord injury
This study tests if taking probiotics and prebiotics can help with digestion, gas, constipation, and other stomach issues in people with long-term spinal cord injury.
Nottwil, Canton of LucerneAges 18 years+ - NCT06861062Recruiting
Vitamin D and yeast beta-glucan for type 2 diabetes
This trial tests if taking vitamin D3 and yeast beta-glucan supplements can help control blood sugar and lower heart disease risk in people with type 2 diabetes. It may be an option for those who want to see if supplements can improve their diabetes management.
Nanning, GuangxiAges 40–79 - NCT03824106Recruiting
Frailty rehab program for older adults at YMCA
This trial studies a rehabilitation (rehab) program to help older adults who are at risk of losing mobility and independence. You may be offered group-based rehab at the YMCA if you meet age, mobility, safety, and participation requirements.
Hamilton, OntarioAges 65 years+ - NCT06576466Recruiting
Creatine for stroke recovery
This study tests whether taking a daily creatine supplement for a few weeks can help people recover movement better after a recent clot-caused stroke. If you've had a stroke in the past 1 to 5 days and need rehab for weakness or coordination issues, you may be able to join.
Palma de Mallorca, Balearic IslandsAges 18–80 - NCT06845501Recruiting
Purine supplements for AICA-ribosiduria
This trial tests whether adding purines (natural substances found in foods) to your diet can help treat AICA-ribosiduria, a rare genetic condition. It may be a safe and simple therapy option for you.
Saint-EtienneAges 3 years+ - NCT06766604Recruiting
Super-GDF9 for egg maturation in women with PCOS
This study tests a protein called Super-GDF9 added to the lab process of maturing eggs from very small follicles. It may help women with PCOS produce more usable eggs for in vitro fertilization (IVF).
Ho Chi Minh CityAges 18–38 - NCT06821802Recruiting
Protein supplement for low sodium from SIAD
This trial tests if a protein supplement can help patients with low sodium caused by a condition called SIAD. If you have SIAD and low sodium, you may be able to join.
BaselAges 18 years+ - NCT06834594RecruitingPhase 4
Bleeding patterns in teens with Turner syndrome on progesterone
This study looks at how different ways of taking progesterone (a hormone given along with estrogen) affect bleeding patterns in teens with Turner syndrome. The goal is to find the best hormone schedule to cause regular, predictable periods.
Kansas City, MissouriAges 12–20
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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.