Clinical trials
Supplementation clinical trials
Below are recruiting supplementation clinical trials, each written for real people, not researchers. We’re tracking 692 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07594444Recruiting
Whey Protein and Adaptogenic Supplements for Active Women
This study tests whether whey protein combined with adaptogenic herbs (natural stress-reducing supplements) can improve athletic performance and recovery in physically active women. You'll take supplements for several weeks while maintaining your normal training routine, and researchers will measure changes in your strength and fitness.
Brighton, East SussexAges 18–45 - NCT07453212Enrolling by invitation
Food supplement for dry eye caused by meibomian gland issues
This trial tests a food supplement designed to improve dry eye symptoms by targeting the microbiome. It may help if you have dry eye due to meibomian gland problems and are not using contact lenses or certain other eye treatments.
IstanbulAges 18–65 - NCT07029243Recruiting
Prehabilitation and supplement for frail cirrhosis patients
This study tests whether a prehabilitation program (exercise and nutrition planning) along with a supplement containing creatine and whey protein can help improve strength and well-being in people with cirrhosis who are frail. The goal is to see if this combination can help you feel stronger and more active.
San Francisco, CaliforniaAges 18 years+ - NCT03807310Recruiting
Vitamin and fatty-acid supplement study for COPD recovery
This trial tests whether a targeted supplement (vitamins D and fatty acids) can help people with COPD. It’s meant for people who are medically stable and not currently dealing with a recent COPD flare-up.
Maastricht, LimburgAges 18 years+ - NCT04428658Recruiting
Telehealth coaching for kids to improve blood sugar control
This trial tests whether extra diabetes coaching delivered through online video and online messages can lower blood sugar levels in children with type 1 diabetes. It may help your child improve diabetes control by combining real-time and non-real-time support.
Sacramento, CaliforniaAges 5–18 - NCT04883515Recruiting
Glutamine drink for insulin resistance and bowel symptoms
This trial studies whether taking an oral glutamine supplement can improve insulin resistance and reduce bowel-related problems in people with obesity and irritable bowel syndrome. It may help your blood sugar regulation and digestive comfort if you meet the criteria.
RouenAges 18–65 - NCT05525039Recruiting
Vibration plus supplement trial for weak muscles and nerves
This trial studies whether a vibration treatment combined with an HMB supplement can improve weak muscle quality and reduce early nerve-to-muscle connection problems. It is mainly for older adults who already have signs of low muscle strength or function.
Hong KongAges 60 years+ - NCT05877846Recruiting
Personalized care to improve physical function in older adults
This study looks at precision (personalized) approaches to help older adults improve physical function. It may include giving a specific supplement depending on lab results, and it requires regular study visits and ability to complete procedures.
Chapel Hill, North CarolinaAges 65–85 - NCT06172764RecruitingPhase 4
Vitamin D for early cavities: a saliva study
This study tests whether vitamin D supplements can help improve the health of your mouth by looking at changes in saliva and the bacteria that cause cavities. If you have early cavities and low vitamin D, you may be able to join.
Karachi, SindhAges 12–50 - NCT06531460Recruiting
Omega-3 nutrition before lung cancer surgery
This study tests whether a special nutrition drink with omega-3 (a healthy fat found in fish) can help people recover better after lung cancer surgery. You may qualify if you are about to have lung removal surgery.
Mexico CityAges 18 years+ - NCT06596083Recruiting
Ketone supplement and altitude training study
This study tests whether drinking a ketone supplement helps your body adapt better during a 5-week altitude training program. You would live at high altitude but train at low altitude.
Leuven, Vlaams-BrabantAges 18–35 - NCT06619249RecruitingPhase 4
CoQ10 and Endurance Training for Runners: Brain and Body Benefits
This trial tests whether adding a supplement called CoQ10 (a natural energy booster) to your endurance training can improve how your body releases helpful molecules during running and may even boost your thinking skills. It's for experienced long-distance runners who want to see if this combination can help them perform and feel better.
GdanskAges 30–50 - NCT06687343Recruiting
Do amino acids help maintain muscle in young men?
This study looks at how certain amino acids (building blocks of protein) help maintain muscle mass. Healthy young men eat a special diet and have their muscle protein production measured to see if non-essential amino acids matter for keeping muscles strong.
MaastrichtAges 18–35 - NCT06748989Recruiting
Dietary supplement for memory and focus in postmenopausal women
This study tests whether a dietary supplement containing PQQ, GABA, caffeine, and B vitamins can improve thinking and memory in healthy women after menopause. Participation involves taking the supplement for a period and completing simple cognitive tests.
Debrecen, HBAges 18 years+ - NCT06780813Recruiting
High flow oxygen to reduce infections in obese gynecologic cancer patients
This trial tests whether giving high flow oxygen during and after surgery can lower the risk of infections in obese women with gynecological cancer. It may help improve recovery after surgery.
AthensAges 18–85 - NCT06841458Recruiting
Dietary supplement for hair growth in men with mild to moderate baldness
This study tests whether a dietary supplement helps hair growth in men with mild to moderate male pattern baldness. It lasts 6 months, and you will not know if you are getting the real supplement or a placebo.
Valencia, ValenciaAges 18–45 - NCT06852014Recruiting
Nutritional supplement study for malnourished pancreatic cancer patients
This trial tests whether a special drink called Peptamen 1.6 can help improve nutrition and recovery in patients who are malnourished or at risk and have had surgery for pancreatic cancer. It aims to understand how the supplement affects the body right after surgery.
Málaga, MálagaAges 18 years+ - NCT06953232Recruiting
Protein drink for heart and brain in midlife women
This study tests a special protein drink (whey with milk fat globule membrane) to see if it helps your heart and brain after a high-fat breakfast. It might help you if you are a postmenopausal woman at moderate risk for heart disease.
Loughborough, LeicestershireAges 50–75 - NCT06989203Recruiting
Protein supplement study for body weight
This trial tests how protein supplements affect body weight in people who are either normal weight or overweight. The goal is to see if adding protein helps with weight management.
Hangzhou, ZhejiangAges 20–50 - NCT07041489Recruiting
Supplement and serum for hair growth in women with thinning hair
This trial tests whether a combination of a dietary supplement and a topical serum can help women with thinning hair grow thicker, fuller hair. It's designed for women who have noticed mild to moderate hair thinning and want a non-invasive approach.
Birmingham, AlabamaAges 28–65 - NCT07085455Recruiting
Timing of IV nutrition in critically ill patients
This trial tests whether giving IV nutrition (supplemental parenteral nutrition) at different times helps critically ill patients who are not getting enough calories from tube feeding alone. It may improve recovery for people with organ failure in the ICU.
Changchun, JilinAges 18 years+ - NCT07131384Recruiting
Nitrate supplement and metformin for prediabetes
This trial tests whether adding a nitrate supplement to metformin helps people with prediabetes. It looks at how the two treatments interact, especially when you start exercising. The study might help you if you have prediabetes, are between 18 and 60 years old, and don't exercise much.
Charlottesville, VirginiaAges 18–60 - NCT07148908Recruiting
Protein from animals vs. microbes: how your body uses it
This study compares how well your body uses protein from animal and microbial sources. It may help us understand which protein types are best for active, healthy adults.
Toronto, OntarioAges 18–45 - NCT07172425Recruiting
Testing nitrate-enriched foods for blood vessel health
This study tests whether adding nitrate (a natural compound found in leafy greens and beets) to foods can boost the body’s levels of nitric oxide, which helps blood vessels relax and improve blood flow. If you’re a healthy adult, you may be able to join to help researchers learn how diet affects your blood vessels.
LondonAges 18–60
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Common questions
- Are there clinical trials for supplementation?
- Yes. Clin2 currently lists 692 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.