Core: healthy volunteers
Studies for healthy volunteers recruiting now
These studies say in their official record that they accept healthy volunteers. Many are Phase 1 studies that test how a new medicine is absorbed and tolerated; others recruit healthy people as a comparison group alongside patients.
4,991 recruiting studiesSource: ClinicalTrials.gov, refreshed October 28, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingHealthy volunteersPhase 3
Study to Learn About Safety, Tolerability, and Immune Response of a Catch-up Pneumococcal Vaccine in Children and Adolescents
Pfizer
- Location
- Birmingham, AL + 58 other US sites
- Eligibility basics
- Ages 1–17
- RecruitingHealthy volunteers
The Impact of Overnight Active Temperature Regulation on the Gut Microbiome, Inflammation, and Circadian Rhythm.
Eight Sleep Inc.
- Location
- Newton Center, MA
- Eligibility basics
- Ages 45+
- RecruitingHealthy volunteers
A Clinical Trial to Evaluate the Effects of Adrenal Adapt on Sleep Quality, Daytime Energy, Stress Resilience, and Cognitive Performance.
Bioligent
- Location
- Las Vegas, NV
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
A Clinical Trial to Evaluate the Effects of a Children's Daily Multivitamin on Perceived Growth, Immune Health, Energy, and Focus in Children
Hiya Health
- Location
- Las Vegas, NV
- Eligibility basics
- Ages 3–12
- RecruitingHealthy volunteers
Reduction of Adverse Drug Events and Readmissions
ClinLogic LLC
- Location
- York, PA
- Eligibility basics
- Ages 25+
- RecruitingHealthy volunteers
Prospective Multi-Center Trial for FemBloc Permanent Birth Control
Femasys Inc.
- Location
- Chandler, AZ + 11 other US sites
- Eligibility basics
- Ages 21–50 · Women only
- RecruitingHealthy volunteers
DESCANSO, a Mental Health Intervention for Depression, Insomnia, and Fatigue Symptoms in Latino People With Cancer
Ponce Medical School Foundation, Inc.
- Location
- Basking Ridge, NJ + 6 other US sites
- Eligibility basics
- Ages 21–100
- RecruitingHealthy volunteers
A Study to Determine the Effect of Access to Multiple Tobacco Flavor Options on Smoking Abstinence Among Primary Cigarette Smokers Using an Electronic Nicotine Delivery System
RAI Services Company
- Location
- Fort Lauderdale, FL + 4 other US sites
- Eligibility basics
- Ages 21–65
- RecruitingHealthy volunteers
Extensively Hydrolyzed Formula Growth Monitioring Study (GMS)
Mead Johnson Nutrition
- Location
- Birmingham, AL + 9 other US sites
- Eligibility basics
- Ages 0 mo–0 mo
- RecruitingHealthy volunteersPhase 3
A Study to Learn About How a New Pneumococcal Vaccine Works in Infants.
Pfizer
- Location
- Birmingham, AL + 101 other US sites
- Eligibility basics
- Ages 1 mo–7 mo
- RecruitingHealthy volunteersPhase 3
A Study of Aleniglipron in Adults With Obesity or Overweight and Type 2 Diabetes Mellitus (ACCOMPLISH-2)
Gasherbrum Bio, Inc., a wholly owned subsidiary of Structure Therapeutics
- Location
- Birmingham, AL + 55 other US sites
- Eligibility basics
- Ages 18–79
- RecruitingHealthy volunteers
IgG Binding Protein LT in Support of a Healthy Gut on the Go
Bactolife A/S
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteers
Galleri® in the Medicare Population.
GRAIL, Inc.
- Location
- Fort Smith, AR + 70 other US sites
- Eligibility basics
- Ages 50+
- RecruitingHealthy volunteersPhase 3
A Study to Evaluate the Efficacy and Safety of CBL-514 Injection for Reducing Subcutaneous Fat
Caliway Biopharmaceuticals Co., Ltd.
- Location
- Encinitas, CA + 5 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Nellcor™ Investigational Device Sitting-Walking Study
Medtronic - MITG
- Location
- Denver, CO
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteers
GUT-FEELINGS: Using Citizen Science for Large-Scale Prebiotic Clinical Trials for Mental Wellness in Adults
Holobiome, Inc.
- Location
- Del Mar, CA
- Eligibility basics
- Ages 21–80
- RecruitingHealthy volunteers
Scaling Effective Behavioral Interventions With MPC Avatar-Based Virtual Training
dfusion Inc
- Location
- Scotts Valley, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
A Study Assessing Safety, Tolerability, and Efficacy of INNA-051 in Preventing Respiratory Illness Due to Viral Infections in Healthy Adults 18 to 45 Years of Age
ENA Respiratory Pty Ltd
- Location
- Baltimore, MD + 5 other US sites
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Safety and Tolerability Evaluation of IgG Binding Protein LT
Bactolife A/S
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteersPhase 4
Study to Assess Safety and Tolerability of KarXT With Administration of Antiemetics in Healthy Volunteers
Karuna Therapeutics, Inc., a Bristol Myers Squibb company
- Location
- Los Alamitos, CA + 3 other US sites
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 4
Study of a Recombinant Spike COVID-19 Vaccine With Matrix-M in Older Adults and People at Increased Risk of Severe COVID-19
Sanofi
- Location
- Fair Oaks, CA + 19 other US sites
- Eligibility basics
- Ages 12+
- RecruitingHealthy volunteers
A Clinical Trial to Evaluate the Effects of the Kaia Relief - Cycle System on Premenstrual Symptom Severity, Menstrual Discomfort, and Overall Well-Being in Premenopausal Women.
Vivance Group
- Location
- Las Vegas, NV
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteersPhase 3
A Phase 3 Study of Revaccination in Subsequent Pregnancies With Bivalent RSV Vaccine and Duration of Protection of a Single Dose
Pfizer
- Location
- Birmingham, AL + 76 other US sites
- Eligibility basics
- Ages 0 mo+
- RecruitingHealthy volunteers
Acquisition and Clinical Image Evaluation of Fujifilm's High Resolution (HR) Digital Breast Tomosynthesis (DBT) Images.
Fujifilm Medical Systems USA, Inc.
- Location
- Salt Lake City, UT
- Eligibility basics
- Ages 40+ · Women only
Who these studies look for
“Healthy” is decided at screening, not by you. Sites usually check vital signs, blood and urine tests, an ECG, your medications and sometimes your BMI or smoking status. A study can still turn you away for reasons that have nothing to do with being unwell, such as timing or a full roster.
Matching a page like this one never means you qualify. Each research team decides eligibility at screening.
Questions
Do healthy volunteer studies pay?
Many do, because volunteers give up time and follow strict schedules, but amounts are set by each study and are usually only confirmed by the research site. When a record states an amount we show the exact wording; otherwise we say compensation is not disclosed.
What happens at a screening visit?
Expect consent paperwork first, then a health questionnaire, vital signs, blood and urine samples and often an ECG. You can ask questions and withdraw at any time, before or after you sign.