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
- NCT05090267Recruiting
Gut-brain treatments for alcohol use and memory changes
This study tests whether gut-brain–targeted treatments (including probiotics and stimulation of a nerve) can improve thinking and inflammation-related health in people who use alcohol. You may be able to join if you have memory/thinking problems and meet specific medical limits, including HIV immune system levels.
Coral Gables, FloridaAges 35–70 - 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 - NCT04944836RecruitingPhase 2
Testosterone supplement with rotator cuff repair
This study tests whether taking a sex hormone (testosterone) around the time of rotator cuff surgery improves healing after repair. It may help some men recover better, but it only fits people with specific tear features and health conditions.
Salt Lake City, UtahAges 40–80 - NCT04858412Recruiting
Amino acid supplement to help people with COVID-19 and alcohol liver disease
This study tests whether an HMB-enriched amino acid supplement can improve outcomes in adults who have COVID-19 pneumonia, especially those with alcohol-related liver disease. The trial compares results in people with alcohol liver disease versus those without, to see if the supplement helps during recovery.
Cleveland, OhioAges 21 years+ - NCT04923087Recruiting
Sound and eating pleasure study for older adults
This trial tests if listening to sounds while eating can make the experience more enjoyable for older adults in hospitals or nursing homes. If you are 65 or older and can safely eat cookies, you may be eligible.
NiceAges 65 years+ - NCT04700527RecruitingPhase 1/Phase 2
Nutritional supplement for reducing side effects from radiation to the belly or pelvis
This trial is studying whether a nutritional supplement (a type of short-chain fatty acid) can help reduce the side effects of radiation therapy for cancers in the abdomen or pelvis. It aims to improve quality of life during treatment.
Chapel Hill, North CarolinaAges 18 years+ - NCT04614714RecruitingPhase 2/Phase 3
Nicotinamide riboside to boost breast milk for very premature infants
This study tests whether an oral supplement called nicotinamide riboside can increase milk output in mothers of extremely premature babies. If it works, it may help you provide enough breast milk for your baby’s early NICU needs.
Sacramento, CaliforniaAges 18 years+ - NCT04677816RecruitingPhase 2
Vitamin D for a better response to chemotherapy
This study tests whether taking high-dose vitamin D before and during chemotherapy helps eliminate more cancer before surgery in people with triple-negative breast cancer who are low in vitamin D.
Winston-Salem, North CarolinaAges 18 years+ - NCT04395196RecruitingPhase 2
Prenatal choline for pregnancy after alcohol exposure
This trial tests whether taking a choline supplement during pregnancy can reduce harmful effects on the baby when a person drinks heavily while pregnant. It may help support healthier pregnancy and baby outcomes for those who meet the study’s drinking and nutrition criteria.
Cape Town, Western CapeAges 18–45 - NCT04288635Recruiting
Testing a nutrient supplement for energy problems in septic shock
This study looks at whether a metabolite (nutrient) supplement can help the body’s cells work better when someone is in septic shock. It is done in the ICU, and it may benefit people with sepsis who still have poor circulation and high lactate levels despite standard treatment.
Angers, Maine et LoireAges 18 years+ - NCT04332341RecruitingEarly Phase 1
Nicotinamide riboside during bone marrow transplant
This trial studies whether a supplement called nicotinamide riboside (a vitamin-like product) can be given safely during allogeneic bone marrow transplant. It may help researchers understand how well it works and how it affects recovery for people getting a donor transplant.
Cleveland, OhioAges 18 years+ - NCT04226898RecruitingPhase 2
Synbiotic supplement to lessen schizophrenia symptoms
This Phase 2 trial tests whether a “synbiotic” supplement (a mix of probiotics and prebiotics) can reduce symptoms of schizophrenia or schizoaffective disorder. It may help by targeting gut-related immune and inflammation pathways that could affect brain symptoms.
Batlimore, MarylandAges 18–65 - NCT04118387RecruitingPhase 4
Study of how to treat central sleep apnea in Veterans
This Phase 4 study looks at what’s going on in the body during central sleep apnea and uses that information to guide treatment. If you have central sleep apnea, this could help confirm or improve how treatment is chosen for you.
Detroit, MichiganAges 18 years+ - NCT04096014Recruiting
Protein supplement at night to prevent repeat brain episodes
This study tests whether taking extra protein in the late evening or early morning can lower the chance of being readmitted for hepatic encephalopathy, a brain problem that can happen with liver disease. It may help by supporting safer nutrition and reducing the risk of another hospitalization.
Cleveland, OhioAges 18–75 - NCT03908736RecruitingPhase 2
Zinc supplements study for adults on the Navajo Nation
This study tests how daily zinc supplements affect participants in specific Navajo Nation communities by checking changes in blood and urine. It’s mainly meant for adults who are willing to take zinc and come to scheduled study visits.
Albuquerque, New MexicoAges 21–64 - NCT03934905RecruitingPhase 1/Phase 2
Sulforaphane supplement to protect the heart during doxorubicin
This trial tests whether a nutritional supplement called sulforaphane (SFN) can help protect heart function in people with breast cancer who are receiving doxorubicin (a chemotherapy that can affect the heart). Participants take caplets and have heart and safety monitoring to see if the supplement reduces heart-related side effects.
Lubbock, TexasAges 18–89 - NCT03529019RecruitingEarly Phase 1
Nutrition study for poor blood flow to a limb
This early-phase study looks at how nutrition affects people who have very poor blood flow to a limb (critical limb ischemia). It’s exploring whether nutrition changes health outcomes and safety for this condition.
Boston, MassachusettsAges 18–99 - NCT03322891Recruiting
Helping African-American men understand prostate cancer care
This study tests an approach to improve health understanding for African-American patients with early-stage prostate cancer. It may help you communicate better with your care team and feel more confident managing your diagnosis and next steps.
Atlanta, GeorgiaAges 25–100 - NCT03059173RecruitingPhase 3
Myo-inositol to help women with PCOS get pregnant
This trial tests whether taking myo-inositol helps women with PCOS improve fertility and get pregnant. It compares outcomes in women who have not used the common fertility medicine clomiphene citrate (CC) recently.
LilleAges 18–35 - NCT03208868Recruiting
Amino acid drink to help rebuild muscle in cirrhosis
This trial tests whether a special mix of amino acids (building blocks for muscle) can help reverse muscle loss in people with cirrhosis. It aims to improve muscle health while keeping you safe from known complications of liver disease.
Cleveland, OhioAges 18–70 - NCT03201094Recruiting
NMES and whey protein for recovery after aneurysmal brain bleed
This pilot study tests whether a therapy that gently stimulates nerves (NMES) and a whey-protein supplement (HPRO) can improve recovery after an aneurysmal subarachnoid hemorrhage (SAH), a type of bleeding around the brain. Participants are usually treated soon after the bleed and stay in the ICU long enough for the study measures.
Baltimore, MarylandAges 18 years+ - NCT02922894RecruitingPhase 4
Testing sleep apnea care in people with spinal cord injury
This study looks at treatment for sleep apnea (breathing pauses during sleep) in adults with a spinal cord injury. If you qualify, the trial team may help manage sleep-related breathing problems and track how well the treatment works.
Detroit, MichiganAges 18–89 - NCT02947750RecruitingPhase 2
Exercise study in people with kidney disease
This Phase 2 study tests how engaging in supervised exercise affects the body’s blood-vessel responses in people with chronic kidney disease (CKD) who don’t exercise regularly. It may help researchers understand whether exercise could be beneficial for CKD-related health changes.
Atlanta, GeorgiaAges 18–75
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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.