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
- NCT06612554Recruiting
Zinc supplements for HIV patients with low CD4 counts
This trial tests whether taking zinc supplements helps HIV patients who have low CD4 cell counts even when their virus is well-controlled. If your zinc levels are normal but your immune cells are slow to recover, this might be for you.
BarcelonaAges 18 years+ - NCT06612762Recruiting
Naringenin supplements for bone fracture recovery
This trial tests whether taking naringenin, a natural supplement found in citrus fruits, can help improve healing after a broken leg bone surgery. It is for adults who could walk without help before their injury.
TehranAges 18–60 - NCT04949451Recruiting
Testing time-restricted eating for muscle and metabolism
This study looks at whether eating only during certain hours can improve muscle and metabolism in adults with higher body weight. You may be asked to follow a specific eating schedule and avoid things that could affect the results.
Fayetteville, ArkansasAges 25–50 - NCT06587945RecruitingPhase 4
Nicotinamide riboside for retinal detachment repair
This trial tests if taking a daily supplement called nicotinamide riboside after retinal detachment surgery can help the eye heal better and see more clearly. It is for people who had a specific type of retinal detachment and have already had cataract surgery.
East Melbourne, VictoriaAges 18 years+ - NCT06578637Enrolling by invitation
BHB supplement study for familial adenomatous polyposis
This trial tests whether taking a supplement called beta-hydroxybutyrate (BHB) can help prevent polyps in people with familial adenomatous polyposis (FAP), a condition that causes many polyps in the colon. The study has two parts: one for people who have already had colon surgery, and another for those who still have their colon.
Philadelphia, PennsylvaniaAges 18 years+ - NCT06582329RecruitingPhase 2
Testing alpha-1 antitrypsin for severe alcohol-related liver inflammation
This study tests whether giving a protein called alpha-1 antitrypsin can help people with severe liver inflammation caused by heavy drinking. It may reduce the damage and improve recovery.
InnsbruckAges 18 years+ - NCT06567665Recruiting
Leucine supplement for muscle building in older men
This study tests if taking a leucine supplement (an amino acid found in protein) can help older men build muscle more effectively. You may be eligible if you are a healthy, non-smoking man between 65 and 75 who does not currently do weight training.
Nottingham, NottinghamshireAges 65–75 - 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 - NCT06551285Recruiting
Nutrition supplement for PCOS: effects on health and quality of life
This study tests whether a nutritional supplement can improve metabolism, reduce inflammation, and enhance quality of life in women with polycystic ovary syndrome (PCOS). It aims to help manage PCOS symptoms through dietary support.
Valencia, ValenciaAges 18–45 - NCT06535945RecruitingPhase 4
Albumin to protect kidney function after liver transplant
This trial tests whether giving albumin (a protein in your blood) after a liver transplant can help prevent or reduce kidney damage. It is for adults receiving their first liver-only transplant from a deceased donor.
Chambray-lès-ToursAges 18 years+ - NCT06546189Recruiting
Probiotics for overactive bladder treatment
This study tests whether a daily probiotic supplement (Lactobacillus) can help reduce overactive bladder symptoms. It compares the supplement to a placebo in a randomized trial.
ViennaAges 18 years+ - NCT06521086Recruiting
Better nutrition recovery for trauma patients
This study tests if a special nutrition plan helps older adults recover better after a traumatic injury. It aims to improve healing by providing extra nutrition through food and drinks.
Durham, North CarolinaAges 45 years+ - NCT03977207Recruiting
Thyroid hormone supplement for people on dialysis
This trial tests whether taking a thyroid hormone supplement helps people who are on hemodialysis and have borderline-high thyroid lab results (high TSH but normal FT4). It’s studying whether treatment changes thyroid-related outcomes or health while on dialysis.
Orange, CaliforniaAges 18–75 - NCT06480695Recruiting
Exercise and Beetroot Supplement in Post-Menopausal Women
This study tests whether different exercise intensities combined with a beetroot-based nitrate supplement can improve blood vessel health in post-menopausal women who do not currently exercise regularly.
Charlottesville, VirginiaAges 45–75 - NCT06492512RecruitingPhase 4
Iron every other day vs daily for pregnancy anemia
This trial compares taking iron pills every other day versus every day to treat iron deficiency anemia in pregnancy. It tests whether spacing out iron doses works just as well and may be easier on the stomach.
Springfield, IllinoisAges 18–45 - NCT06488638Recruiting
Beetroot juice supplement for lung fibrosis
This trial tests whether a beetroot juice drink (rich in nitrates) can help people with idiopathic pulmonary fibrosis breathe better and exercise more. It's a small pilot study to see if it's safe and worth studying further.
SouthamptonAges 18–85 - NCT06475807Recruiting
Dietary changes for people on immunotherapy for cancer
This study tests whether a change in diet can help people with early-stage melanoma or lung cancer who are receiving immunotherapy (a type of treatment that helps your immune system fight cancer). You will be asked to follow a diet, give blood and stool samples, and complete questionnaires to see how the diet affects your body and treatment.
Pittsburgh, PennsylvaniaAges 18 years+ - NCT05519254RecruitingPhase 3
Lactoferrin and lysozyme for lasting diarrhea in young children
This trial tests whether a supplement (lactoferrin and lysozyme) can help children who have long-term effects after diarrhea. It’s designed for children ages 6 to 24 months and checks whether improving gut recovery can reduce ongoing problems.
Homa BayAges 6 months–2 years - NCT06450925RecruitingPhase 2
Vitamin A supplement for stem cell transplant patients
This study tests whether giving vitamin A by mouth to adults before and after a stem cell transplant can help their recovery. The goal is to see if it reduces complications and improves overall outcomes.
Tampa, FloridaAges 18 years+ - NCT06438445Recruiting
Royal Jelly Supplement for Kidney Disease on Dialysis
This study tests whether a daily supplement called royal jelly can help people with chronic kidney disease who are on dialysis. Researchers will check if it improves health markers.
Rio de Janeiro, Rio de JaneiroAges 18–70 - 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+ - NCT06401694Enrolling by invitation
Enhanced home meal program for older adults' health
This trial is testing a new, enhanced home-delivered meal program for older adults. It aims to see if these meals improve health and well-being for people who are already eligible for Meals on Wheels and are at nutritional risk.
Storrs, ConnecticutAges 60 years+ - NCT06395506Recruiting
Exercise and creatine for breast cancer survivors
This trial tests if adding creatine supplements to a virtual exercise program helps breast cancer survivors recover after chemotherapy. Participants will attend online exercise sessions three times a week and take creatine by mouth.
Galveston, TexasAges 18–75 - NCT06362837Recruiting
Nutrition, hygiene, and sexual health program for families
This trial tests a program called REACTS-IN to improve nutrition, hygiene, and sexual/reproductive health. It is designed for mothers, fathers, adolescents, and young children living in communities in Kenya.
DhakaAges Any age
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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.