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Showing 1–24 of 205 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dietary Fat Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Food and Circadian Timing

NCT04743271
View directory record Official record
Conditions
Diet, High-Fat, Circadian Rhythm
Interventions
High-Fat Diet, Low-Fat Diet
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 40 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional

Determinants of Fat Malabsorption After Roux-en-Y Gastric Bypass

NCT01252511
View directory record Official record
Conditions
Severe Obesity
Interventions
RYGB for surgical treatment of severe obesity
Procedure
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 16, 2019 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet, Exercise and/or Rosiglitazone for HIV-Associated Insulin Resistance

NCT00264251
View directory record Official record
Conditions
HIV Infections, Insulin Resistance, Obesity
Interventions
Weight loss through diet and exercise, Rosiglitazone insulin sensitizing agent
Behavioral · Drug
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
20 Years to 60 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 28, 2007 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption

NCT01508845
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
50 Years and older
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 20, 2014 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Phase 1 Interventional

Effect of High Monounsaturated Fat Diet on Glycemic Control and Cardiovascular Risk Factors in Type 2 Diabetes

NCT00622960
View directory record Official record
Conditions
Overweight, Obesity, Type 2 Diabetes
Interventions
High-MUFA diet, High-CHO diet
Other
Lead sponsor
University of Cincinnati
Other
Eligibility
30 Years to 75 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 24, 2008 · Synced Sep 9, 2026, 7:56 PM EDT
Not listed Not applicable Interventional

Dietary Supplementation on Fat Oxidation

NCT06548048
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Dietary supplement containing plant derived phenolics, Microcrystaline cellulose
Dietary Supplement
Lead sponsor
Brightseed
Industry
Eligibility
18 Years to 50 Years · Female only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 11, 2024 · Synced Sep 9, 2026, 7:56 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Energy Dense Fueling for Cold-Weather Operations

NCT07489690
View directory record Official record
Conditions
Cold Exposure
Interventions
High Fat, High Carbohydrate
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 23, 2026 · Synced Sep 9, 2026, 7:56 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Effects of Red Beetroot Juice on High-Fat Meal-Induced Endothelial Dysfunction and Cardiometabolic Disturbances

NCT02949115
View directory record Official record
Conditions
Overweight, Obesity, Aging, Menopause
Interventions
70 mL red beetroot juice, 70 mL red beetroot juice without nitrate, 70 mL placebo drink plus potassium nitrate, 70 mL placebo drink
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
40 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 12, 2018 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional

A Low Glycemic Load Diet During Pregnancy in Overweight Women

NCT00364403
View directory record Official record
Conditions
Overweight, Pregnancy
Interventions
Low glycemic load, Low fat diet
Behavioral
Lead sponsor
Boston Children's Hospital
Other
Eligibility
25 Years and older · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 29, 2010 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Phase 1 Interventional

Low Fat Diet and Multiple Sclerosis

NCT00852722
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Low fat study diet
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 70 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 3, 2015 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Lipoprotein Effects of Substituting Beef Protein for Carbohydrate

NCT00852267
View directory record Official record
Conditions
Healthy, Cardiovascular Disease, Atherogenic Dyslipidemia
Interventions
High Carbohydrate, High Saturated Fat Diet, Low Carbohydrate, High Saturated Fat Diet, Low Carbohydrate, Low Saturated Fat Diet
Other
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older · Male only
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Dec 23, 2020 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Treatment Study of Fat Synthesis and Risk of Cardiovascular Disease

NCT02075710
View directory record Official record
Conditions
Overweight and Obesity
Interventions
High sugar/meal feed, High sugar/nibble, High fat/meal feed, High fat/nibble, High sugar/ 3 meals a day, High fat/ 3 meals a day
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
20 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2021
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Class of Dietary Fat Affect Insulin Resistance?

NCT01541592
View directory record Official record
Conditions
Insulin Resistance
Interventions
Dietary fat
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 25, 2014 · Synced Sep 9, 2026, 7:56 PM EDT
Active, not recruiting Not applicable Interventional

Evaluating the Influence of Diet-induced Weight Loss on Fat (Adipose) Tissue's Insulin Sensitivity and Testosterone Synthesis in Women With Overweight or Obesity, Insulin Resistance, and Hyperandrogenemia

NCT06998238
View directory record Official record
Conditions
Overweight and Obesity, Hyperandrogenemia, Insulin Resistance
Interventions
Mediterranean-based, carbohydrate restricted, calorie reduced diet
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Avocado and Postprandial Responses

NCT06818032
View directory record Official record
Conditions
Healthy, Healthy Volunteer, Healthy Volunteers, Healthy Adult, Healthy Male and Female Subjects, Healthy Subjects, Healthy Volunteers Only, Healthy Non-smokers
Interventions
Negative control, Avocado, Fat and fiber addition
Other
Lead sponsor
University of Vermont Medical Center
Other
Eligibility
21 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PROOF: PROtein OverFeeding Effect on Body Weight

NCT00565149
View directory record Official record
Conditions
Obesity
Interventions
PROOF
Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 35 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2016
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sparking Gut Bacteria Production of Bioactive Xenolipids in Situ

NCT06313606
View directory record Official record
Conditions
Dietary Fat Metabolism
Interventions
Dietary fat positive control, Dietary fat negative control
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 50 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Phase 4 Interventional

The Effect of Liraglutide on Dietary Lipid Induced Insulin Resistance in Humans

NCT02403284
View directory record Official record
Conditions
Insulin Resistance
Interventions
Liraglutide, Sugar Pill
Drug
Lead sponsor
Phoenix VA Health Care System
Federal
Eligibility
40 Years to 75 Years
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2023
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 21, 2024 · Synced Sep 9, 2026, 7:56 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Examining the Longitudinal Relationship Between Sleep and Weight Gain in College Students

NCT04100967
View directory record Official record
Conditions
Healthy, Overweight
Interventions
Not listed
Lead sponsor
Oakland University
Other
Eligibility
17 Years to 22 Years
Enrollment
116 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Rochester, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 26, 2022 · Synced Sep 9, 2026, 7:56 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Safety and Tolerability of FB-001 in Healthy Adult Volunteers and Adult Subjects With Enteric Hyperoxaluria

NCT05650112
View directory record Official record
Conditions
Healthy, Enteric Hyperoxaluria
Interventions
FB-001, Placebo
Biological
Lead sponsor
Federation Bio Inc.
Industry
Eligibility
18 Years to 74 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 24, 2023 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional

Lifestyle Interventions to Reduce Diabetes Risk

NCT00006162
View directory record Official record
Conditions
Glucose Intolerance, Diabetes Mellitus, Type 2
Interventions
exercise and diet
Behavioral
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
40 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 1999
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 1, 2010 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Phase 2 Interventional Results available

High Fat/High Calorie Trial in Amyotrophic Lateral Sclerosis

NCT00983983
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Oxepa, Jevity 1.5, Jevity 1.0
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
13
States / cities
Phoenix, Arizona • Irvine, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2015 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional

Diet Study on Ulcerative Colitis

NCT04147598
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
LFD, SAD
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 70 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced Sep 9, 2026, 7:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Fatty Acid Composition and Obesity-related Metabolic Abnormalities

NCT01451970
View directory record Official record
Conditions
Overweight/Obese Women
Interventions
High Fat Diet
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 20, 2022 · Synced Sep 9, 2026, 7:56 PM EDT