Clinical trials
Supplementation clinical trials
Below are recruiting supplementation clinical trials, each written for real people, not researchers. We’re tracking 691 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06623981Recruiting
Treating maternal depression in an urban asthma clinic
This study tests whether treating depression in Black mothers of children with asthma can improve both the mother's mood and the child's asthma. It offers support for mothers who are feeling down and may help their child's asthma get better.
Washington D.C., District of ColumbiaAges Any age - NCT06673082Enrolling by invitation
Zinc as a new therapy for cow milk allergy in children
This study tests if adding zinc to standard treatment helps children with cow milk protein allergy. It aims to see if zinc can improve their symptoms and make them feel better.
GizaAges 1 month–12 years - NCT06553729Recruiting
Vitamin D and prebiotic supplement for blood sugar during pregnancy
This trial tests whether taking a combination of vitamin D and a prebiotic can help manage blood sugar levels in pregnant women at high risk for gestational diabetes. It may offer a simple way to support a healthy pregnancy.
Zhanjiang, GuangdongAges 18–45 - NCT06428097RecruitingPhase 1
Thyroid hormone before heart transplant
This study tests whether giving a thyroid hormone supplement called levothyroxine before a heart transplant can help with recovery. It is for people already listed for a heart transplant who do not have thyroid problems.
San Francisco, CaliforniaAges 18 years+ - NCT06275542Enrolling by invitation
Removing breathing tube without standard monitoring device
This study tests if it is safe to remove the breathing tube after surgery based on oxygen levels without using a special nerve monitor. It may help find a simpler method for deciding when to take the tube out.
YogyakartaAges 18–60 - NCT06062017Recruiting
Potassium, hydration, and heart health in young adults
This study looks at how potassium and hydration affect heart and kidney health in healthy young adults. It may help you understand your own health and contribute to new knowledge about preventing disease.
Auburn, AlabamaAges 18–30 - NCT06121479Enrolling by invitationPhase 3
Testing oral amino acid supplements for advanced liver disease
This trial tests if taking branched-chain amino acids by mouth can help people with cirrhosis and ascites (fluid in the belly). It aims to improve nutrition and reduce complications.
Bangkok, BangkokAges 18–85 - NCT06039306Recruiting
Nutrition support before and after stomach cancer surgery
This study tests whether giving special nutrition drinks before and after stomach cancer surgery helps you heal faster and have fewer complications. It combines immune-supporting nutrition with the latest recovery methods to help you get back on your feet sooner.
Putrajaya, PutrajayaAges 18–80 - NCT05971810Recruiting
Oral cleaning and nutrition support around surgery for older adults
This trial studies whether cleaning the mouth before and after major surgery, plus special nutrition support, can lower the risk of breathing complications in older adults. It may help patients who are at higher risk for lung problems around the time of general anesthesia.
Shijiazhuang, HebeiAges 65 years+ - NCT05398367Recruiting
Supplement study to help low milk supply during breastfeeding
This study tests whether a supplement (either an active “galactagogue” or a placebo) can increase milk supply in people who feel they have low breast milk. You would have several check-ins and milk/milk-expression measurements to see if your milk volume changes.
Rock Hill, South CarolinaAges 18–40 - 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+ - NCT05483465RecruitingPhase 4
NAD supplement trial for brain blood vessel health in aging
This trial studies whether taking an NAD supplement can support brain blood vessel health as people age. Participants will be tested for brain and health changes and may help researchers understand how to keep the brain’s blood vessels healthier over time.
Oklahoma City, OklahomaAges 60–85 - NCT05121051RecruitingPhase 2
Broccoli sprout extract to reduce tobacco cancer-causing chemicals
This Phase 2 study tests whether broccoli sprout extract (Avmacol ES) can reduce cancer-causing substances linked to heavy smoking. It’s for adults who smoke heavily and may help lower harmful tobacco-related chemical effects in the body.
Tucson, ArizonaAges 18 years+ - NCT06080841Recruiting
Turmeric supplement study for cervical cancer
This trial tests whether a curcumin (turmeric) supplement can help women with advanced cervical cancer who are about to start standard treatment with chemotherapy and radiation. It aims to see if adding curcumin improves outcomes.
Mexico City, Mexico CityAges 18 years+ - NCT06475391Recruiting
L-arginine supplement for exercise performance
This study tests whether taking L-arginine (a natural amino acid supplement) can improve your performance during short, intense exercise like sprinting or weightlifting. If you are a healthy, active adult, you may be able to join.
Winnipeg, ManitobaAges 18–39 - NCT07421596Recruiting
Dietary supplement study for gut and digestive health
This trial tests whether a dietary supplement system can improve gut and digestive health over 8 weeks. You may be eligible if you have digestive symptoms like bloating, stomach pain, or diarrhea.
San Francisco, CaliforniaAges 18–80 - NCT07143279RecruitingEarly Phase 1
Testosterone for quality of life in men with advanced cancer
This trial tests if testosterone supplements can improve quality of life for men with low testosterone who are no longer receiving active cancer treatment. It aims to help with symptoms like fatigue and low mood.
BrusselsAges 18 years+ - NCT07178769Recruiting
Testing a supplement for lowering cholesterol
This trial tests a nutritional supplement with bergamot, artichoke, and other natural ingredients to see if it can safely lower cholesterol in people with moderately high LDL. It may be an option for those not currently on other cholesterol treatments.
Madrid, MadridAges 18 years+ - NCT05643859Recruiting
Fiber supplement study for bowel health and gut bacteria
This study tests whether adding a dietary fiber supplement can change the bacteria in your colon (gut microbiome). You may be asked to take the fiber supplement during evaluation for a non-cancer rectal condition.
Portland, OregonAges 18 years+ - NCT06295588RecruitingPhase 2
Seaweed supplement for fatigue in cancer survivors
This study tests whether a seaweed-based supplement called fucoidan can help reduce fatigue in cancer survivors. You take a daily capsule and fill out questionnaires about your energy levels.
Rochester, New YorkAges 18 years+ - NCT06311058Recruiting
Protein supplement study for ACL surgery recovery
This trial tests whether a protein supplement can help you recover strength and muscle after ACL surgery. You will continue your standard rehab and take a protein drink daily for several weeks.
Houston, TexasAges 16–40 - NCT07381998Enrolling by invitation
Effects of total thyroid removal on parathyroid function and quality of life
This study looks at how completely removing the thyroid gland affects the nearby parathyroid glands (which control calcium) and your overall quality of life. If you're having a total thyroid removal and meet a few health conditions, you may be able to join.
Aarhus, Central JutlandAges 18 years+ - NCT07529249Recruiting
Oral Collagen Peptides for Skin Barrier Function in Women
This study tests whether taking collagen peptides by mouth can improve dry skin and strengthen the skin barrier in women ages 45–70. Researchers will measure changes in skin moisture and texture over time.
NiceAges 45–70 - NCT07685431Recruiting
Alpha-lipoic acid for IVF in women 35-45
This trial tests whether taking alpha-lipoic acid (an antioxidant supplement) before and during IVF can improve pregnancy success in women aged 35–45 using their own eggs. It aims to see if the supplement can help counter age-related declines in egg quality.
Kaohsiung CityAges 35–45
Hear when a new Supplementation trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for supplementation?
- Yes. Clin2 currently lists 691 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.