Study type
Nutrition and metabolism studies recruiting now
Nutrition and metabolism studies look at diets, supplements, metabolic conditions and fatty liver disease. Some are run by universities with controlled meals.
361 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteersPhase 4
GLUCOSE-MGH: Genetic Links Understood Through Challenge With Oral Semaglutide Exposure at MGH
Massachusetts General Hospital
- Location
- Boston, MA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Digitally Delivered Child Obesity Prevention for Parents in Home Visiting Programs
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 16–65
- RecruitingHealthy volunteers
Adding Polyphenol-rich Pulses to Daily Diet Improves Skin Health by Reshaping the Skin Microbiome
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 45–65 · Women only
- RecruitingHealthy volunteers
Integrating Free-choice Marketplace, dieTitian coacHing, cultuRally Tailored messagIng to improVE Blood Pressure
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 21–70
- RecruitingHealthy volunteers
Harvesting Health: Advancing Nutrition and Wellness for Moms and Babies
Texas A&M University
- Location
- College Station, TX + 2 other US sites
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Developing a Nutritional Supplement to Increase Collagen Synthesis in People
University of California, Davis
- Location
- Davis, CA
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteersPhase 4
Understanding the Efficacy of Dietary Supplement on Fungal Mycobiota in Healthy Volunteers: A Pilot Study
Weill Medical College of Cornell University
- Location
- New York, NY
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Delivering HOPE (Helping Women Optimize Prenatal Equity)
University of Arkansas
- Location
- Corning, AR + 6 other US sites
- Eligibility basics
- Ages 16–44 · Women only
- RecruitingHealthy volunteers
Gut Flora Metabolite Reduction After Dietary Intervention (GRADY)
The Cleveland Clinic
- Location
- Cleveland, OH
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Cardiovascular and Metabolic Sciences Biorepository
The Cleveland Clinic
- Location
- Cleveland, OH
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Ketone Conferred Resiliency Against Sleep Restriction With Nutritional Intervention.
Ohio State University
- Location
- Columbus, OH
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Optimizing Self-Monitoring Feedback Delivery for the Treatment of Overweight and Obesity
Wake Forest University Health Sciences
- Location
- Milwaukee, WI
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Reversal of Lipid-Induced Insulin Resistance
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
Effect of the Thrive AI Health App on Lifestyle Behaviors and Quality of Life
Yale University
- Location
- New Haven, CT
- Eligibility basics
- Ages 40+
- RecruitingHealthy volunteers
Nicotinamide Riboside, Vit B3 Analogue, and Brain Energy Metabolism
Massachusetts General Hospital
- Location
- Boston, MA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Our Voices Matter: Intervention for Depression in Youth
Ann & Robert H Lurie Children's Hospital of Chicago
- Location
- Chicago, IL
- Eligibility basics
- Ages 15–20
- RecruitingHealthy volunteers
Multivitamin and Mineral Supplementation and Healthy Aging
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 40–60
- RecruitingHealthy volunteers
Polyphenols and Cognitive Decline
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 50+
- RecruitingHealthy volunteers
Longitudinal Measurements of Visual Diet in Children
State University of New York College of Optometry
- Location
- New York, NY
- Eligibility basics
- Ages 7–12
- RecruitingHealthy volunteers
Mothers and CareGivers Investing in Children Study 2.0
University of Texas at Austin
- Location
- Austin, TX
- Eligibility basics
- Ages 0 mo–90
- RecruitingHealthy volunteers
Increased Dietary Protein Intake During GLP-1 Medication Use (in Middle-aged Women With Overweight/Obesity)
University of Texas at Austin
- Location
- Austin, TX
- Eligibility basics
- Ages 30–60 · Women only
- RecruitingHealthy volunteers
Early Childhood Dietary Assessment Study
The University of Tennessee, Knoxville
- Location
- Knoxville, TN
- Eligibility basics
- Ages 2–5
- RecruitingHealthy volunteers
Craving & Decision-Making
Rutgers, The State University of New Jersey
- Location
- Piscataway, NJ
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Pharyngeal Exercise (Plus Protein)
NYU Langone Health
- Location
- New York, NY + 1 other US site
- Eligibility basics
- Ages 65+
Who these studies look for
Expect limits on supplements, alcohol and diet changes during the study, and sometimes a set BMI range.
Matching a page like this one never means you qualify. Each research team decides eligibility at screening.
Questions
Are meals provided in nutrition studies?
Sometimes. Controlled-feeding studies provide food; others ask you to follow a plan at home. The listing summary and the study team explain what is involved.