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
Intermittent Fasting on Body Fat and Quality of Life
Loma Linda University
- Location
- Loma Linda, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Reducing Obesity Through Play Among Toddlers: Tiny Steps to Health (TSHS) Study
University of Houston
- Location
- Houston, TX
- Eligibility basics
- Ages 1–3
- RecruitingHealthy volunteers
Effects of a 5-Week Probiotic Supplementation Intervention on Markers of Delayed Onset Muscle Soreness
University of Minnesota
- Location
- Minneapolis, MN
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Determinants of Insulin Sensitivity by Age, Sex, Race/Ethnicity, BMI, and PCOS Diagnosis
Ali Chappell
- Location
- Houston, TX
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
Probiotic Supplementation in Optimizing Iron and Hematological Status Among Pregnant Females
University of Illinois at Chicago
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Diet Synergy in Muscle Protein Synthesis
University of Illinois at Urbana-Champaign
- Location
- Urbana, IL
- Eligibility basics
- Ages 19–40
- RecruitingHealthy volunteers
Dietary Iron Requirements
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA + 1 other US site
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteers
Efficacy and Safety of Shatavari Root Extract in Women's Sexual Wellness
SF Research Institute, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 20–50 · Women only
- RecruitingHealthy volunteers
A Pilot Study to Evaluate the Ability of Lactoferrin to Modulate Iron Homeostasis and Exercise Performance in Exercising Females
Lindenwood University
- Location
- Saint Charles, MO
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Exogenous and Endogenous Risk Factors for Early-onset Colorectal Cancer
San Raffaele University
- Location
- Denver, CO + 1 other US site
- Eligibility basics
- Ages 18–49
- RecruitingHealthy volunteersPhase 2
A Dietary Supplement (Resistant Potato Starch) for Reducing Musculoskeletal Symptoms in Individuals Planning to Receive Aromatase Inhibitor Therapy, AIMSS-RPS Trial
University of Michigan Rogel Cancer Center
- Location
- Ann Arbor, MI
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Ketogenic Diet and Brain Response in Anorexia Nervosa
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Sodium vs Potassium Education to Improve Vascular Health
Florida State University
- Location
- Tallahassee, FL
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Dietary Peanuts and Nutrition-Related Outcomes
Ian J. Neeland, MD
- Location
- Clevland, OH
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Cognitive-Behavioral Therapy and Exercise Training in Adolescents At-Risk for Type 2 Diabetes
Colorado State University
- Location
- Aurora, CO + 1 other US site
- Eligibility basics
- Ages 12–17 · Women only
- RecruitingHealthy volunteers
Impacts of Sugar Warnings on Weight Bias
University of North Carolina, Chapel Hill
- Location
- Chapel Hill, NC
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Insomnia Treatment and Cardiometabolic Health in Older Adults With Posttraumatic Stress Disorder
University of California, Los Angeles
- Location
- North Hills, CA
- Eligibility basics
- Ages 50+
- RecruitingHealthy volunteers
Metabolic Adaptations to Weight Loss With and Without Exercise
University of Michigan
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
The Sleep2BWell Trial
Columbia University
- Location
- New York, NY + 1 other US site
- Eligibility basics
- Ages 20+
- RecruitingHealthy volunteers
The CARING Study: Creating and Restoring Health Through Nutrition Guidance
Physicians Committee for Responsible Medicine
- Location
- Washington D.C., DC
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Prebiotic Effects of California Grapes on Gut Health and Cardiometabolic Health in Overweight Men and Women
University of California, Davis
- Location
- Davis, CA
- Eligibility basics
- Ages 45–70
- RecruitingHealthy volunteers
PREnatal Choline and Infant Outcomes Study
East Carolina University
- Location
- Greenville, NC
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
Changes in 24-hour Activity Cycle Behaviors During a Time-Restricted Eating Intervention in College-Aged Women
University of Georgia
- Location
- Athens, GA
- Eligibility basics
- Ages 18–26 · Women only
- RecruitingHealthy volunteers
Testing the Adipose Expandability Hypothesis In Vivo During Overfeeding
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA
- Eligibility basics
- Ages 18–42
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.