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Showing 1–24 of 74 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Ad Libitum Diet Clear all
Terminated Not applicable Interventional

Reducing Insulin, Growth Hormones, and Tumors

NCT03785808
View directory record Official record
Conditions
Diet Modification, Lung Cancer
Interventions
Special Diet Therapy (low-carb), Special Diet Therapy (low-fat), Special Diet Therapy (USDA control)
Behavioral
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 11, 2019 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Results available

TRE With Physical Activity for Weight Management

NCT04978376
View directory record Official record
Conditions
Pre Diabetes, Overweight and Obesity
Interventions
Time restricted eating
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
50 Years to 70 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 17, 2024 · Synced Sep 8, 2026, 1:06 AM EDT
Recruiting Not applicable Interventional

Whole Foods for Teens: A Pilot Dietary Intervention to Reduce Body Adiposity in Adolescents With Obesity

NCT06464497
View directory record Official record
Conditions
Obesity, Childhood, Diet, Healthy, Body Weight Changes
Interventions
Whole Foods MyPlate Group
Behavioral
Lead sponsor
Vanderbilt University
Other
Eligibility
10 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 22, 2026 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional

Dietary Restriction in Vascular Surgery

NCT04013412
View directory record Official record
Conditions
Vascular Diseases, Surgery
Interventions
Protein-Calorie Restriction
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 24, 2020 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Facilitating Participation in a Prostate Cancer Risk Assessment Program

NCT02126319
View directory record Official record
Conditions
Prostate Cancer
Interventions
Cognitive Affective preparation, General Health Education
Behavioral
Lead sponsor
Fox Chase Cancer Center
Other
Eligibility
34 Years to 69 Years · Male only
Enrollment
128 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1998 – 2002
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 5, 2017 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

CALERIE: Comprehensive Assessment of Long-Term Effects of Reducing Intake of Energy

NCT00427193
View directory record Official record
Conditions
Aging
Interventions
Caloric Restriction (CR), Control
Behavioral
Lead sponsor
Duke University
Other
Eligibility
21 Years to 50 Years
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
3
States / cities
Baton Rouge, Louisiana • Boston, Massachusetts • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 15, 2022 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional

A Low-Carbohydrate Diabetes Prevention Program

NCT03258918
View directory record Official record
Conditions
PreDiabetes
Interventions
Low-Carbohydrate Diabetes Prevention Program
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 11, 2018 · Synced Sep 8, 2026, 1:06 AM EDT
Withdrawn Not applicable Interventional

Short-Term Endogenous Hydrogen Sulfide Upregulation For Vein Graft Disease

NCT05457881
View directory record Official record
Conditions
Vascular Diseases, Surgery
Interventions
Scandi-Shake
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Impact of Dietary Restriction of Animal Protein and Fat on Osteoarthritis

NCT01939262
View directory record Official record
Conditions
Osteoarthritis
Interventions
Limitation of Animal Fat and Protein in the Diet, Control
Other
Lead sponsor
Essentia Health
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Traverse City, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 19, 2013 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Behavior of Infants Fed Formula Supplemented With Prebiotics

NCT02757924
View directory record Official record
Conditions
Gastrointestinal Tolerance
Interventions
Infant formula supplemented with prebiotics
Other
Lead sponsor
Abbott Nutrition
Industry
Eligibility
7 Days to 42 Days
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
11
States / cities
Dothan, Alabama • Pensacola, Florida • St. Petersburg, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2017 · Synced Sep 8, 2026, 1:06 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

The CALERIE™ Legacy Study

NCT05651620
View directory record Official record
Conditions
Calorie Restriction
Interventions
Not listed
Lead sponsor
Tufts University
Other
Eligibility
33 Years to 70 Years
Enrollment
216 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
3
States / cities
Baton Rouge, Louisiana • Boston, Massachusetts • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Energy Balance Weight Regulation Study

NCT00619008
View directory record Official record
Conditions
Obesity
Interventions
Ad libitum low carbohydrate diet, Ad libitum High Complex Carbohydrate Diet, Energy-restricted high complex carbohydrate diet
Other
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
21 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 2, 2008 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

BIG Study (Brain, Immune, and Gut Health Evaluation of Infants/Young Children Fed Infant Formula, and Later Supplemental Toddler Nutrition, With 5 Specific HMOs)

NCT04957992
View directory record Official record
Conditions
Growth
Interventions
Control Infant Formula, Control Toddler Drink, Experimental Infant Formula, Experimental Toddler Drink, Human Milk, Human Milk Supplemental Formula, Human Milk Toddler Drink
Other
Lead sponsor
Abbott Nutrition
Industry
Eligibility
0 Days to 14 Days
Enrollment
607 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
42
States / cities
Phoenix, Arizona • Glenwood, Arkansas • Hot Springs, Arkansas + 35 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional

Weekly ONe-Day WatER-only Fasting InterventionaL Trial for Low-Density Lipoprotein Cholesterol Reduction

NCT02770313
View directory record Official record
Conditions
Intermittent Fasting
Interventions
Intermittent Fasting
Behavioral
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
21 Years to 70 Years
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Jul 16, 2020 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Results available

Prolonged Daily Fasting as a Viable Alternative to Caloric Restriction in At-Risk Obese Humans

NCT04259632
View directory record Official record
Conditions
Obesity
Interventions
Time Restricted Eating (TRE), Caloric Restriction (CR)
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Time Restricted Eating for the Treatment of PCOS

NCT05629858
View directory record Official record
Conditions
Polycystic Ovary Syndrome, Obesity, Overweight
Interventions
6-h Time restricted eating (TRE), Calorie restriction (CR), Control
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 12, 2025 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Paleo Diet 8wk Feasibility in Overweight Adults

NCT03814473
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Diet
Other
Lead sponsor
University of Houston
Other
Eligibility
18 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 23, 2019 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Location-based Smartphone Technology to Guide College Students Healthy Choices Ph II

NCT02996864
View directory record Official record
Conditions
Overweight and Obesity, Health Behavior, Sleep Deprivation
Interventions
Healthy Detours App, Fat Secret App
Other
Lead sponsor
Klein Buendel, Inc.
Industry
Eligibility
18 Years to 29 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
2
States / cities
Golden, Colorado • Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 5, 2023 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Intermittent Fasting Versus Daily Caloric Restriction for Weight Loss

NCT03411356
View directory record Official record
Conditions
Obesity
Interventions
Daily Caloric Restriction (DCR), Intermittent Fasting (IMF)
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 60 Years
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 8, 2026, 1:06 AM EDT
Active, not recruiting Not applicable Interventional

4:3 Intermittent Fasting Intervention in Adults With Breast Cancer and Overweight or Obesity

NCT06399276
View directory record Official record
Conditions
Breast Cancer
Interventions
Weight Loss
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating a Remotely Delivered Plant-Based Behavioral Weight Loss Treatment

NCT04892030
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Whole Food Plant-Based Behavioral Weight Loss Treatment
Behavioral
Lead sponsor
Drexel University
Other
Eligibility
18 Years to 75 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2021 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Time Restricted Eating for Weight Management

NCT04692532
View directory record Official record
Conditions
Obesity
Interventions
8-hour Time restricted eating, Calorie restriction
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 26, 2026 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Time Restricted Eating With or Without a Fiber Supplement for Weight Management in Pediatric Cancer Survivors

NCT05826184
View directory record Official record
Conditions
Weight, Body
Interventions
Time restircted eating, Time restricted eating + prebiotic
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 39 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced Sep 8, 2026, 1:06 AM EDT
Completed Not applicable Interventional

Intermittent Fasting in Adults With Type 1 Diabetes

NCT06134986
View directory record Official record
Conditions
Type 1 Diabetes, Obesity
Interventions
Time restricted eating, Daily calorie restriction
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 75 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Sep 8, 2026, 1:06 AM EDT