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
- NCT07803068Recruiting
Ashwagandha supplement and weight training for strength and focus
This study tests whether taking ashwagandha, an herb often used for stress, for 12 weeks can boost strength, brain function, and stress resilience when combined with your regular weight training. It's for healthy, active men who already lift weights regularly.
Gdansk, Pomeranian VoivodeshipAges 25–40 - NCT07801001Enrolling by invitation
Zinc supplements for women with polycystic ovary syndrome
This study tests whether taking zinc supplements can improve insulin resistance and reduce symptoms in women with polycystic ovary syndrome (PCOS). If you have PCOS and are not pregnant, you may be able to join.
DhakaAges 18–45 - NCT07799610Recruiting
Medication safety program for older adults
This program helps adults 55 and older learn how to manage their medications safely and confidently. It may be helpful if you take prescription medicines and want to avoid mistakes or side effects.
Buffalo, New YorkAges 55 years+ - NCT07795996Recruiting
Thiamine supplementation in pregnancy
This study tests whether giving thiamine (vitamin B1) to pregnant women in Cambodia improves the health of their babies. Participants receive thiamine or a placebo during pregnancy and their babies are monitored for a year.
Kampong ThomAges 18–45 - NCT07792876Recruiting
Testing ketone and carbohydrate supplements in trained cyclists
This study is testing how taking ketone and carbohydrate supplements affects performance in trained cyclists. It is looking for male amateur cyclists who train regularly and have a high fitness level.
Ribeirão Preto, São PauloAges 20–50 - NCT06508099RecruitingPhase 2
Vitamin A and D supplements after stem cell transplant
This trial tests whether taking vitamin A and D after a stem cell transplant can help improve recovery. It is for people with certain blood cancers who have a matched donor and are in remission or have low disease activity.
Saint PetersburgAges 18 years+ - NCT07788833Recruiting
Postbiotic supplement for weight and metabolic health
This study tests a postbiotic supplement for weight management and metabolic health in healthy adults. It may help improve body weight, metabolic markers, and quality of life.
Dallas, TexasAges 18–55 - NCT07786116Recruiting
Gut bacteria in Parkinson's disease and related conditions
This study looks at how certain gut bacteria (methanogens) are involved in the progression of Parkinson's disease and related conditions. It aims to understand the connection between gut health and brain health, which may lead to better treatments.
Cambridge, CB2Ages 55 years+ - NCT07791797RecruitingPhase 4
Comparing absorption of two supplement formulas in healthy adults
This trial compares how well your body absorbs two different supplement formulas. It may help researchers understand which formula is better for healthy adults.
Fortitude Valley, QueenslandAges 18 years+ - NCT07779265Recruiting
Probiotic supplement for gut health in healthy adults
This trial tests a daily probiotic supplement's effect on digestion, immune health, and overall well-being. If you're a healthy adult, you may help discover if this product can make you feel better day-to-day.
TrierAges 18–65 - NCT07783529Recruiting
Two surgical options for shinbone fractures in teens
This study compares two types of surgery for a certain kind of shinbone (tibia) fracture in teenagers. The goal is to see which method leads to better healing and recovery with fewer complications.
Sohag, Sohag GovernorateAges 10–16 - NCT07783399Recruiting
Carnitine supplement for women having IVF
This study tests whether taking a carnitine supplement before and during IVF can improve egg quality. It may help women who are having trouble with egg development during fertility treatment.
Belgrade, Savski VenacAges 18–45 - NCT07777367Recruiting
Exercise with liquid oxygen in chronic lung disease
This study compares how well people with chronic lung diseases perform during exercise when breathing regular air versus when using low-flow liquid oxygen. It aims to see if using liquid oxygen during exercise can improve exercise ability and quality of life.
Zurich, Canton of ZurichAges 18 years+ - NCT07777445Recruiting
Oxygen treatment during exercise for lung and pulmonary vascular disease
This study compares breathing normal air versus low-flow liquid oxygen during exercise to see if oxygen helps improve performance in people with conditions affecting the lungs or the blood vessels in the lungs. You would exercise while using a portable oxygen device and then without it to compare the effects.
Zurich, Canton of ZurichAges 18 years+ - NCT05937789Recruiting
Vitamin D3 during early ICU care to help critically ill adults
This trial tests whether starting vitamin D3 soon after ICU admission helps critically ill adults with low vitamin D levels. It may help correct low vitamin D and possibly improve recovery, depending on your health situation.
TaipeiAges 18 years+ - NCT06265246Recruiting
Milk and yogurt for stronger bones in young adults
This study tests whether adding milk and yogurt to your diet can improve bone health and body composition. If you're a young adult with low calcium intake, you may qualify to join.
Saskatoon, SaskatchewanAges 19–30 - NCT05923333Recruiting
Breastfed infants of HIV-exposed mothers get a probiotic
This study gives a specific probiotic (from B. infantis) to babies born without HIV to see if it can improve the baby’s early immune health. It focuses on babies who are HIV-exposed because their mother has HIV and plans to exclusively breastfeed for the first 6 months.
Cape TownAges birth–50 years - NCT07761546Enrolling by invitation
Ai-test: microbiome nutrition for low testosterone
This study tests whether a special diet can improve symptoms of low testosterone in men. It is intended to help men with certain symptoms like a low sex drive or trouble having erections and whose blood tests show low to borderline testosterone levels.
AydinAges 30–65 - NCT07764328Recruiting
Supplement for hormone balance in women with PCOS
This trial tests a dietary supplement designed to improve hormone balance in women with PCOS or PCOS-like symptoms. It may help regulate menstrual cycles and reduce signs like acne or excess hair growth.
Los Angeles, CaliforniaAges 18–40 - NCT07760506Recruiting
Quercetin and CoQ10 supplements for health in sedentary adults
This study tests whether two natural supplements, quercetin and CoQ10, can reduce inflammation and improve metabolic health in adults who are not very active. If you are overweight and at risk for prediabetes, this trial might help you understand how these supplements affect your body.
Tampa, FloridaAges 50–75 - NCT07766395Recruiting
Daily powder for women's wellness and fitness
This trial tests a daily powder supplement designed to support lean muscle, hormone balance, digestion, and skin, hair, and nail health. If you're an active woman with some common wellness concerns, this study may help you see if the supplement makes a difference.
Las Vegas, NevadaAges 21–45 - NCT07766720Recruiting
Eggshell membrane and turmeric supplements for exercise recovery
This trial tests whether taking eggshell membrane, curcumin (turmeric), or both together can help your muscles recover faster after intense exercise. It may reduce soreness and help you bounce back sooner.
College Station, TexasAges 18–40 - NCT06576986Recruiting
Can a supplement prevent mouth sores during chemo?
This trial tests whether a special supplement (synbiotic) can prevent mouth sores caused by chemotherapy in people with colorectal cancer. It's for those starting treatment who live in or near Belo Horizonte, Brazil.
Belo Horizonte, Minas GeraisAges 18 years+ - NCT07764991RecruitingPhase 2
Lactoferrin supplement for diabetic kidney disease
This study tests whether taking a lactoferrin supplement can help people with type 2 diabetes and chronic kidney disease (stage 3 or 4) by reducing protein in their urine, which is a sign of kidney damage. It may offer a new way to slow the progression of kidney disease.
CairoAges 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.