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 volunteers
UCLA Magnesium Formulation Athlete Study
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
Characterization of Patients With Uncommon Presentations and/or Uncommon Diseases Associated With the Cardiovascular System
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Washington D.C., DC + 1 other US site
- Eligibility basics
- Ages 1–100
- RecruitingHealthy volunteers
Mechanisms Underlying Individual Variations of Taste and Smell in Obesity
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Natural History of the Human Biological Response to Environmental Exposure and Injury
National Institute of Environmental Health Sciences (NIEHS)
- Location
- Research Triangle Park, NC
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
Nutrition for Precision Health, Powered by the All of Us
RTI International
- Location
- Birmingham, AL + 12 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Interactive Roles of Cardiorespiratory Fitness and Adiposity on Glucose and Vascular Control After Physical Inactivity
Miami University
- Location
- Oxford, OH
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Longitudinal Deep Phenotyping of Central Mechanisms in Dysosmia: A Pilot Study Using Electrobulbogram (EBG), Functional MRI (fMRI), and Diffusion-Weighted Imaging (DWI)
National Institute on Deafness and Other Communication Disorders (NIDCD)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–99
- RecruitingHealthy volunteers
Blood Collection Biorepository for Liver Disease Research
State University of New York at Buffalo
- Location
- Buffalo, NY
- Eligibility basics
- Ages 7+
- RecruitingHealthy volunteers
A Natural History Study of Metabolic Sizing in Health and Disease
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–99
- RecruitingHealthy volunteers
How Animal and Plant Protein Shakes Change the Body's Nutrient and Health Responses
University of Pittsburgh
- Location
- Pittsburgh, PA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
GENESIS: Genotype Guided - Natriuretic Peptides - Cardiometabolic Health Study
University of Alabama at Birmingham
- Location
- Birmingham, AL
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Strong Teens for Healthy Schools Change Club: A Civic Engagement Approach to Improving Physical Activity and Healthy Eating Environments
Texas A&M University
- Location
- Dallas, TX
- Eligibility basics
- Ages 8+
- RecruitingHealthy volunteers
Advancing Precision Nutrition: Wearable Technology for Noninvasive Insulin Monitoring
Texas A&M University
- Location
- College Station, TX
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
A Trial to Examine the Effects of a Weight Loss Program Emphasizing Protein, Dietary Fiber, and Exercise (30-30-30 Plan)
Midwest Center for Metabolic and Cardiovascular Research
- Location
- Addison, IL + 2 other US sites
- Eligibility basics
- Ages 18–69
- RecruitingHealthy volunteers
Supplementation of Cholecalciferol and Related Active Metabolites Through Bioenhancing Layer's Eggs
Cornell University
- Location
- Ithaca, NY
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Feasibility of an ADAPTive Intervention to Improve Food Security and Maternal-Child Health
Wake Forest University Health Sciences
- Location
- Winston-Salem, NC
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteers
Effects of Pre-Run Nutritional Supplements During a Fixed-Pace 5 km Treadmill Run
St. Louis University
- Location
- St Louis, MO
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
Wakaya: Rising Up for Choctaw Youth Health
University of Washington
- Location
- Durant, OK + 1 other US site
- Eligibility basics
- Ages 12–19
- RecruitingHealthy volunteers
Cooking HEalthy and Facilitating Early Childhood Development: CHEF-ED Study
Baylor College of Medicine
- Location
- Houston, TX
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
Comparison of ALD, NASH, and Healthy Control Patients
The Cleveland Clinic
- Location
- Cleveland, OH
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteers
Effects of Lean Beef Consumption on Cardiometabolic Health and Gut Microbiome
University of Missouri-Columbia
- Location
- Columbia, MO
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Precise Oncology Interventions in Nutrition and Training (OnPoint)
University of Miami
- Location
- Miami, FL
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Variability In Mixed Meal Tests: Fixed Versus Adjusted to Energy Needs Caloric Dose
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Phoenix, AZ
- Eligibility basics
- Ages 18–99
- RecruitingHealthy volunteers
Pennington Generation Cohort
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA
- Eligibility basics
- Any age listed
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.