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.
4,995 recruiting studiesSource: ClinicalTrials.gov, refreshed October 27, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingHealthy volunteersEarly Phase 1
Role of Neural and Hormonal Regulation Factors on Insulin Secretion After Gastric Bypass Surgery
The University of Texas Health Science Center at San Antonio
- Location
- San Antonio, TX + 1 other US site
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersEarly Phase 1
Glucagon-like Peptide 1, Glucose Metabolism and Gastric Bypass
The University of Texas Health Science Center at San Antonio
- Location
- San Antonio, TX + 1 other US site
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersEarly Phase 1
The Effects of Bariatric Surgeries on Glucose Metabolism
The University of Texas Health Science Center at San Antonio
- Location
- San Antonio, TX + 1 other US site
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersEarly Phase 1
Assess Performance Attributes and Acceptability of Non-medicated Intravaginal Rings Among Sexually Active Women in Atlanta, GA
Population Council
- Location
- Atlanta, GA
- Eligibility basics
- Ages 18–49 · Women only
- RecruitingHealthy volunteersEarly Phase 1
Sensitivity of Angiotensin II Type II Receptors in Women Following Preeclampsia
Anna Stanhewicz, PhD
- Location
- Iowa City, IA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteersEarly Phase 1
Comparing Approaches to Assess Nitric Oxide-dependent Cutaneous Vasodilation
University of Iowa
- Location
- Iowa City, IA
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteersEarly Phase 1
Acute Progesterone Suppression of Wake vs. Sleep Luteinizing Hormone Pulse Frequency in Pubertal Girls With and Without Hyperandrogenism
University of Virginia
- Location
- Charlottesville, VA
- Eligibility basics
- Ages 10–17 · Women only
- RecruitingHealthy volunteersEarly Phase 1
Hyperandrogenemia and Altered Day-night LH Pulse Patterns
University of Virginia
- Location
- Charlottesville, VA
- Eligibility basics
- Ages 10–17 · Women only
- RecruitingHealthy volunteersEarly Phase 1
Study to Assess Potential Impairments in Estradiol Augmentation of Gonadotropin Secretion in Polycystic Ovary Syndrome
University of Virginia
- Location
- Charlottesville, VA
- Eligibility basics
- Ages 18–30 · Women only
- RecruitingHealthy volunteersEarly Phase 1
Does Spironolactone Normalize Sleep-wake Luteinizing Hormone Pulse Frequency in Pubertal Girls With Hyperandrogenism?
University of Virginia
- Location
- Charlottesville, VA
- Eligibility basics
- Ages 10–17 · Women only
- RecruitingHealthy volunteersOvernight stay mentioned
Effects of Using a Storybook, to Explain Leukemia to Children Versus the Standard Child Life Intervention, on Parental Stress.
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 3+
- RecruitingHealthy volunteersPhase 1
PET Detection of CCR2 in Human Atherosclerosis
Washington University School of Medicine
- Location
- St Louis, MO
- Eligibility basics
- Ages 18–89
- RecruitingHealthy volunteersPhase 1/Phase 2
Immunogenicity of Yellow Fever Vaccine 17D in Adults With Prior 17D Vaccination
Oregon Health and Science University
- Location
- Portland, OR
- Eligibility basics
- Ages 20–49
- RecruitingHealthy volunteersEarly Phase 1
Intradermal Influenza Vaccination
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteersPhase 4Overnight stay mentioned
Simethicone as Part of ERAS in Bariatric Surgery Patients
Madigan Army Medical Center
- Location
- Tacoma, WA
- Eligibility basics
- Ages 18–89
- RecruitingHealthy volunteersPhase 1
Gender Related Differences in the Acute Effects of Delta-9-Tetrahydrocannabinol in Healthy Humans
Yale University
- Location
- West Haven, CT
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1
Gender Related Differences in the Acute Effects of Delta-9-Tetrahydrocannabinol in Healthy Humans: Sub-Study I
Yale University
- Location
- West Haven, CT
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersPhase 1/Phase 2
Vaginal Microbiome Seeding and Health Outcomes in Cesarean-delivered Neonates.
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Falls Church, VA
- Eligibility basics
- Ages 0 mo–50
- RecruitingHealthy volunteersPhase 1
PET Imaging of Radiolabeled Anti-HIV-1 Envelope Monoclonal Antibody (VRC01)
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersEarly Phase 1
Reversing Glucose and Lipid-mediated Vascular Dysfunction
University of Kansas Medical Center
- Location
- Kansas City, KS
- Eligibility basics
- Ages 18–79
- RecruitingHealthy volunteersEarly Phase 1
Prenatal Aspirin and Postpartum Vascular Function
Anna Stanhewicz, PhD
- Location
- Iowa City, IA
- Eligibility basics
- Ages 18–50 · Women only
- RecruitingHealthy volunteersPhase 1
B-Complex: A Nutraceutical SANS Countermeasure
National Aeronautics and Space Administration (NASA)
- Location
- Houston, TX
- Eligibility basics
- Ages 20–100
- RecruitingHealthy volunteersEarly Phase 1
Metformin for the Treatment of Microvascular Dysfunction After Gestational Diabetes
Anna Stanhewicz, PhD
- Location
- Iowa City, IA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteersPhase 1
Hyperpolarized 13C-pyruvate Metabolic MRI With Traumatic Brain Injury
University of Maryland, Baltimore
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–80
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.