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
- NCT07755943Recruiting
Long-term supplement use and biological age
This study looks at whether taking Shaklee supplements for more than a year is linked to a younger biological age and better metabolic health. If you're 40 or older and have been using these supplements long-term, your participation could help understand their potential benefits.
Addison, IllinoisAges 40 years+ - NCT07740824Recruiting
Oral supplement for healthier, younger-looking skin
This study tests an oral supplement to see if it improves signs of facial skin aging in healthy adults. Participants take the supplement daily for 8 weeks and undergo two small skin biopsies on the upper arms to measure changes.
Bangalore, KarnatakaAges 35–65 - NCT07743073Recruiting
Ceylon cinnamon for diabetic nerve pain
This study tests whether taking Ceylon cinnamon daily can help lower blood sugar, improve cholesterol, and reduce nerve pain in adults with type 2 diabetes and painful diabetic peripheral neuropathy. If you qualify, you might get a natural supplement that could ease your symptoms.
AmmanAges 18 years+ - NCT07730606RecruitingPhase 3
Sodium bicarbonate supplement study for female basketball players
This study tests if taking sodium bicarbonate (a common kitchen ingredient) can improve performance in female basketball players. It's designed for healthy athletes who train regularly.
PoznanAges 16–35 - NCT07716904Recruiting
Whey Protein and Adaptogen Supplement for Active Men
This study tests whether a whey protein drink with an adaptogen (ashwagandha) can help physically active men perform better and recover faster. You would keep your usual diet and exercise routine while taking the supplement.
Brighton, East SussexAges 18–45 - NCT07695883RecruitingPhase 3
Vitamins and minerals for teen girls' health
This study tests whether giving teen girls extra vitamins and minerals improves their growth and health. It may help girls who are still growing and living at home.
Rangpur CityAges 10–18 - NCT06666660Recruiting
Multivitamin study for middle-aged adults
This trial tests whether taking a daily multivitamin and mineral supplement can slow or reverse biological aging in healthy middle-aged adults. It involves blood tests, wearing an OURA ring, and using a study app.
Singapore, SingaporeAges 40–60 - NCT07672132Recruiting
Zinc and inflammation in older hospital patients
This trial tests whether giving zinc supplements can reduce inflammation in older adults who are admitted to the hospital. If you are over 65 and already part of another study at Herlev Hospital, you may be able to join.
Herlev, Region HovedstadAges 65 years+ - NCT07670234Recruiting
Dietary Supplements and Cancer Treatment
This study looks at how dietary supplements (like vitamins and herbs) affect cancer patients who are on treatment. It checks if supplements cause side effects, change how medications work, or interact with each other.
RabatAges 18 years+ - NCT05480696RecruitingPhase 2
Soluble fiber supplement for fatty liver in kids
This Phase 2 study tests whether a soluble fiber supplement can improve fatty liver disease in children who have obesity and confirmed NAFLD. It may help reduce liver fat and related liver enzyme elevations measured during clinic visits and MRI.
Hamilton, OntarioAges 8–17 - NCT07651514Recruiting
Magnesium and Melatonin for Better Sleep and Leg Cramps
This study tests whether taking daily magnesium and melatonin supplements can help improve sleep quality and reduce nighttime leg cramps in adults. You'll wear a special ring to track your sleep and use a smartphone app to log your experiences.
Palm Beach Gardens, FloridaAges 40–75 - NCT07652684RecruitingPhase 4
Fat supplement to help premature babies' lungs
This study tests whether adding a special fat supplement to the feeding of very premature babies can help prevent or reduce lung damage, which is common in babies born early. The supplement is given through a feeding tube.
ThessalonikiAges 6 months–7 months - NCT07642869Recruiting
Vitamins and minerals for healthy aging in middle-aged adults
This study tests whether taking a daily multivitamin and mineral supplement helps middle-aged adults stay healthier and more active as they age. Researchers will track changes in your fitness, energy, and overall wellness over the study period.
La Jolla, CaliforniaAges 40–60 - NCT07622628Recruiting
AI-Guided Microbiome Nutrition for Better Blood Sugar Control
This trial tests whether a personalized nutrition plan based on your gut bacteria (microbiome) can help improve blood sugar control in type 2 diabetes. Researchers will use artificial intelligence to match you with a diet tailored to your unique gut bacteria.
IzmirAges 18–65 - NCT07615673Recruiting
Artichoke supplement study measuring body markers
This study tests an artichoke by-product supplement to see how your body processes and uses it. Researchers will measure markers in your blood and other samples to understand how the supplement affects your digestive health and metabolism.
Pamplona, NavarreAges 18–75 - NCT07615777Recruiting
Nutritional supplements for midlife women's health symptoms
This study tests whether special nutritional supplements can help women aged 38–55 who are experiencing irregular periods or midlife symptoms like hot flushes, sleep problems, or mood changes. The goal is to see if these supplements improve overall health markers and how you feel.
Southampton, HampshireAges 38–55 - NCT05008705Recruiting
Protein and muscle stimulation for hospitalized seniors
This trial tests whether increasing protein intake plus using a gentle electrical muscle stimulation device can help maintain or build muscle mass in older adults while they are hospitalized. It may help prevent muscle loss that can happen after short hospital stays.
São PauloAges 65 years+ - NCT07588633Recruiting
Fiber Supplement to Help Constipation During Pregnancy
This study tests whether a fiber supplement (Materna® Opti-fiber) can safely relieve constipation in pregnant women. If you're experiencing constipation during pregnancy, this trial may help determine if this supplement is effective for you.
Osasco, São PauloAges 21 years+ - NCT07586839Recruiting
Nutritional Supplement for Muscle Recovery in Young Men
This study tests whether a special nutritional supplement helps muscles recover better after exercise. Researchers will compare how well the supplement works in healthy young men who exercise regularly.
Wageningen, GelderlandAges 18–35 - NCT07579845Recruiting
Dietary supplement study on aging markers and body health
This study tests whether a dietary supplement containing humic and fulvic acids (natural compounds) can improve markers of biological aging, inflammation, and how your body handles toxins. Researchers will check blood samples to see if the supplement affects these markers over time.
Richmond, VirginiaAges 40 years+ - NCT07585994Recruiting
Probiotic supplement for long-standing type 1 diabetes
This study tests whether taking a specific probiotic (a beneficial bacteria) for 4 weeks can improve immune function and metabolism in people who have had type 1 diabetes for at least 5 years. Researchers believe this probiotic may help the body's remaining insulin-producing cells work better.
AmsterdamAges 18 years+ - NCT07584278Recruiting
Probiotics and Biomarkers for Irritable Bowel Syndrome
This study tests whether probiotics (beneficial bacteria) can help reduce irritable bowel syndrome (IBS) symptoms and change certain markers in your gut. You'll take a probiotic supplement for 12 weeks while researchers track how your symptoms and gut health change.
GothenburgAges 18 years+ - NCT06727292Recruiting
Test of a skin supplement versus placebo
This trial tests whether a food supplement can improve skin health in people with normal to dry skin. You would take the supplement or a placebo every day and have your skin checked over a few weeks.
Gdansk, GDANSKAges 45–65 - NCT07543562RecruitingPhase 3
Selenium supplement for heart failure patients
This study tests whether taking selenium (a mineral supplement) helps heart failure patients feel better and live longer. Researchers will follow patients over time to see if selenium reduces symptoms and hospital visits.
OsloAges 18 years+
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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.