Clinical trials
Volunteers clinical trials
Below are recruiting volunteers clinical trials, each written for real people, not researchers. We’re tracking 526 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04300946Recruiting
Brain stimulation study using TMS to test time prediction in healthy adults
This study uses a non-invasive brain stimulation method called TMS and brain imaging to understand how the cerebellum affects time prediction. It is for healthy adults and helps researchers learn how brain timing systems work.
StrasbourgAges 18–60 - NCT04354064Recruiting
Blood DNA test to see early treatment response in solid tumors
This study looks at circulating tumor DNA, which is tiny bits of DNA found in blood, to help assess how solid tumors are responding early. It uses blood samples from healthy adults who are willing to donate.
St Louis, MissouriAges 18 years+ - NCT04457622Recruiting
Study brain rhythms and language in healthy adults
This study looks at how your brain responds to language and how brain “rhythms” work. It’s likely to involve recording brain signals while you complete language-related tasks, and you must be able to safely follow all session rules.
BronAges 18–40 - NCT04624490RecruitingPhase 1
Lung function MRI using a special gas in volunteers
This Phase 1 study tests a lung scan that uses a special gas and MRI to measure how well your lungs work. It includes healthy volunteers and people with lung disease to see how well the scan works and how safe it is.
Kansas City, KansasAges 3 years+ - NCT04657042Recruiting
4D MRI scans to guide lung or liver cancer radiation
This trial tests whether special “4D” MRI scans can improve precision radiation planning for people with lung or liver cancer. You may get MRI scan data to better account for tumor movement, alongside your usual radiation treatment.
Charlottesville, VirginiaAges 18–82 - NCT04749134Recruiting
MRI tests to improve radiotherapy planning using healthy volunteers
This study uses MRI scans to help improve how radiotherapy is planned and delivered. You would be an adult volunteer without a patient diagnosis, and your scan may be checked for unexpected (incidental) findings.
ManchesterAges 16 years+ - NCT04755699RecruitingEarly Phase 1
Electrical stimulation study for hand or limb movement recovery
This early-stage study tests whether regular, skin-based electrical stimulation can help people with paralysis or weakness regain movement. You would attend frequent clinic sessions for months, while the team checks your ability to follow instructions and your safety.
Manhasset, New YorkAges 18–75 - NCT04799301RecruitingPhase 1
Measure how much sugar you eat using blood and hair samples
This Phase 1 study tests whether “biomarkers” in your blood and hair can accurately measure how much sugar you consume. It may help researchers find better ways to track dietary sugar intake in future nutrition and health studies.
Phoenix, ArizonaAges 18–65 - NCT05107232Recruiting
Volunteer MRI scan sequences for better image quality
This study helps improve MRI scan settings by testing different MRI image sequences on volunteers. It may help future patients by making MRI scans clearer and more useful.
RennesAges 6 years+ - NCT05108259RecruitingPhase 1
Safety and blood-level study of PBP1502 versus Humira
This Phase 1 study tests how a new medicine (PBP1502) behaves in the body and checks safety, comparing it to Humira. It is done in healthy adults to see dosing, side effects, and blood levels before moving to studies in patients.
MadridAges 18–55 - NCT05160337Recruiting
Testing how well blood test markers stay stable in healthy people
This study checks whether certain lab “biomarker” results from blood samples remain accurate over time. The goal is to validate diagnostic tests by testing samples from healthy adults under controlled conditions.
HuningueAges 18–85 - NCT05196061Recruiting
Skin and gut sample study for healthy people
This study builds a detailed library of the microbes living on your skin and in your gut. It may help researchers better understand how these microbes relate to health and future diseases.
Cleveland, OhioAges 18 years+ - NCT05285761Recruiting
Feeding guidance study for new parents of newborns
This trial tests whether feeding guidelines for parents lead to better feeding practices for very young babies. You may be asked to fill out questionnaires and, later, have your baby’s meals recorded on camera.
DijonAges 18 years+ - NCT05361733RecruitingPhase 1
Safety and blood-drug study of XFB19 in healthy adults
This Phase 1 study tests whether XFB19 is safe and tolerable in healthy adults and how the drug moves through the body (what the blood levels look like). You would be in the study to help researchers understand early safety and dosing information.
Knoxville, TennesseeAges 18–55 - NCT05393401Recruiting
Measure pulse speed and blood pressure in healthy adults
This study tests how well a device that uses light on your finger or skin can measure pulse wave speed (a health signal) and blood pressure. Because it is done in healthy volunteers, it aims to better understand normal measurements and device performance.
GrenobleAges 18 years+ - NCT05395624RecruitingPhase 1/Phase 2
Safety imaging study of a PET tracer in ALS, Alzheimer, MS, Parkinson
This early-phase study tests the safety of a radioactive tracer (“18F-OP-801”) and how the tracer moves through the body (biodistribution) in people with ALS, Alzheimer’s disease, multiple sclerosis, Parkinson’s disease, and in healthy volunteers. It also measures how the body processes the tracer (“pharmacokinetics”) to support future studies.
San Francisco, CaliforniaAges 18–80 - NCT05403151Recruiting
Healthy blood vessel and control study
This study looks at healthy adults and how their blood vessels work. It may help researchers understand normal circulation so they can better compare changes in future conditions.
Bethesda, MarylandAges 18–90 - NCT05504356Recruiting
Study to improve atrial fibrillation ablation and new therapies
This study looks at what results from atrial fibrillation ablation (a heart rhythm procedure) and newer related therapies. If you recently had the procedure—or are scheduled for it soon—you may use an app and website to share information that helps researchers compare outcomes and improve care.
San Francisco, CaliforniaAges 18 years+ - NCT05545306Recruiting
Study tests how extra calories change your daily energy use
This study looks at how eating more calories affects your body’s natural heat production and total energy use over a full day. It may help researchers better understand how the body manages weight and energy.
Phoenix, ArizonaAges 18–60 - NCT05588154Recruiting
Donate blood and other samples to study blood cancers
This study asks healthy adults to provide blood, bone marrow (if needed), skin, saliva, and stool samples. Scientists use these samples to compare patterns related to myeloid (bone-marrow) blood cancers, which may help future research and tests.
Bethesda, MarylandAges 18–120 - NCT05638854RecruitingPhase 1
Test of ZB002 safety and dosing in rheumatoid arthritis
This early-phase study tests whether ZB002 is safe in people, and how the body handles the drug. It includes both healthy volunteers and people with rheumatoid arthritis (RA) to see if the drug has a predictable blood level pattern.
MelbourneAges 18–70 - NCT05648214RecruitingPhase 1/Phase 2
Testing a new liver medicine in people with fatty liver
This early-phase study tests whether ALN-PNP is safe and well tolerated, first in healthy adults and then in adults with MASLD (fatty liver disease). If you have MASLD, it may help researchers learn whether this medicine is a promising option for treating liver fat buildup.
Glendale, CaliforniaAges 18–75 - NCT05678894Recruiting
Hip and pelvic measurements study for younger adults
This study compares hip positioning (acetabular angle) with pelvic tilt in people with femoro-acetabular impingement and in healthy volunteers. It may help researchers better understand hip mechanics and how they relate to symptoms and planning for arthroscopy surgery.
LyonAges 18–50 - NCT05752396Recruiting
Study of Pain Patterns Over Time in Kids
This study follows kids who have a specific type of chronic pain (headaches, stomach pain, or muscle/joint pain) to better understand how pain changes over time. It also checks whether certain factors are linked to those pain patterns.
Cincinnati, OhioAges 10–19
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Common questions
- Are there clinical trials for volunteers?
- Yes. Clin2 currently lists 526 recruiting volunteers 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 volunteers 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 volunteers 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.