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Showing 1–24 of 204 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dietary Carbohydrate Clear all
Completed Phase 4 Interventional Accepts healthy volunteers

The Safety and Effectiveness of Low and High Carbohydrate Diets

NCT00079547
View directory record Official record
Conditions
Obesity
Interventions
Low-calorie diet, low-carbohydrate diet
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years to 65 Years
Enrollment
307 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2008
U.S. locations
3
States / cities
Denver, Colorado • St Louis, Missouri • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2013 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Lean Body Mass Response to Higher-protein Diets During Winter Military Training

NCT02327208
View directory record Official record
Conditions
Body Weight
Interventions
Control, Protein, Carbohydrate
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years and older
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 20, 2017 · Synced Sep 7, 2026, 1:04 AM 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 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional

Effect of Changing Diet on Fasting and Post Fat Load Lipoproteins

NCT00593424
View directory record Official record
Conditions
Hypertriglyceridemia, Diabetes Mellitus
Interventions
Low Fat/High Carbohydrate, High Monounsaturated Fat/Low Carbohydrate
Other
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 1, 2011 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Phase 2 Interventional Results available

Reduced Carbohydrate Versus Fat in Obese Subjects

NCT00846040
View directory record Official record
Conditions
Obesity
Interventions
Reduced fat diet, Reduced carbohydrate diet, Drug: f-18 fallypride, fMRI, PET
Other · Drug · Device
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 45 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 14, 2021 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oscillations of Dietary Fat/Carbohydrate Intake Over Interval of 3 to 4 Days

NCT01115075
View directory record Official record
Conditions
Healthy
Interventions
Dietary fat/intake of carbohydrate, Spontaneous oscillations of dietary fat/intake of carbohydrate in relation to energy intake.
Other · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
21 Years to 55 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 24, 2016 · Synced Sep 7, 2026, 1:04 AM EDT
Not listed Not applicable Interventional

SCD vs. Mediterranean Diet Therapy in Ulcerative Colitis

NCT04398550
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
Specific Carbohydrate Diet, Mediterranean Diet
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 30, 2022 · Synced Sep 7, 2026, 1:04 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

iSIPsmarter: A Pilot RCT to Evaluate a Web-based Behavioral Intervention to Reduce Sugary Beverages Among Black Adults

NCT06184737
View directory record Official record
Conditions
Diet Habit, Sugar-Sweetened Beverages
Interventions
iSIPsmarter, Patient Education (PE)
Behavioral
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 110 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated May 28, 2025 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional

The Lifestyle Education About Nutrition for Diabetes (Legend) Study

NCT05237128
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Very low-carbohydrate diet, Moderate-carbohydrate plate-method diet
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
21 Years and older
Enrollment
182 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
2
States / cities
San Francisco, California • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Role of Carbohydrate Modification in Weight Management Among Obese Children

NCT00215111
View directory record Official record
Conditions
Childhood Obesity
Interventions
Low carbohydrate, reduced glycemic load, and a control diet
Behavioral
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
7 Years to 12 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 4, 2015 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigating the Production of Lipoproteins and Acetyl-CoA During a Ketogenic Diet

NCT03901014
View directory record Official record
Conditions
Cholesterol Metabolism, Ketone Metabolism
Interventions
Standard American diet, Very low carbohydrate diet
Other
Lead sponsor
Touro University, California
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Vallejo, California
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional

Treatment With the Specific Carbohydrate Diet for Children With Active Crohns Disease and Ulcerative Colitis

NCT02213835
View directory record Official record
Conditions
Crohn's Disease, Ulcerative Colitis
Interventions
Specific Carbohydrate diet (SCD)
Other
Lead sponsor
David Suskind
Other
Eligibility
8 Years to 21 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 23, 2019 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Results available

Very Low Carbohydrate Diet as an Adjunctive Therapy for Youth Type 1 Diabetes

NCT04082884
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Very Low Carbohydrate Diet
Behavioral
Lead sponsor
Yale University
Other
Eligibility
13 Years to 25 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 7, 2026, 1:04 AM EDT
Not listed Not applicable Interventional

Diet in the Management of Acromegaly

NCT05401084
View directory record Official record
Conditions
Acromegaly
Interventions
Diet
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 18, 2024 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Exercise Effects on Insulin, Gut Peptides, and Appetite

NCT01891617
View directory record Official record
Conditions
Endocrine and Metabolic Responses to Exercise and Diets
Interventions
Exercise and diets
Other
Lead sponsor
University of Michigan
Other
Eligibility
50 Years to 65 Years · Female only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 12, 2016 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional

Metabolism of Low Carbohydrate and Ketogenic Diet

NCT05071287
View directory record Official record
Conditions
Diabetic Kidney Disease, Cognitive Function, Weight Loss, Diabetic Control, Type2 Diabetes
Interventions
mHealth + low-fat diet, mHealth + low-carb/ketogenic diet
Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
2
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of High Carbohydrate vs. Low Carbohydrate Diet in Type 2 Diabetes

NCT04416204
View directory record Official record
Conditions
Diabetes Mellitus, Diabetes Mellitus, Type 2
Interventions
glycogen loading, No Glycogen Loading
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
30 Years to 75 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 29, 2024 · Synced Sep 7, 2026, 1:04 AM EDT
Not yet recruiting Not applicable Interventional

Effects of Whole Fruit on Blood Sugar in People With Type 2 Diabetes

NCT07376226
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Whole Fruit
Other
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Reducing Dietary Added-Sugar Consumption During the Transition to College

NCT05823597
View directory record Official record
Conditions
Dietary Added Sugar Consumption
Interventions
Sugar Intensive Treatment, General Health Control
Behavioral
Lead sponsor
Arizona State University
Other
Eligibility
18 Years and older
Enrollment
702 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 20, 2023 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Results available

Trial of Specific Carbohydrate and Mediterranean Diets to Induce Remission of Crohn's Disease

NCT03058679
View directory record Official record
Conditions
Crohn Disease
Interventions
Diet
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
197 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
35
States / cities
Tucson, Arizona • San Francisco, California • Denver, Colorado + 27 more
Source: ClinicalTrials.gov public record
Updated Jul 20, 2021 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Phase 4 Interventional

Lifestyle Modification for Obesity-Related Type 2 Diabetes

NCT00415688
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Overweight, Obesity
Interventions
Low carbohydrate, ketogenic diet, Low glycemic index, reduced calorie diet
Behavioral
Lead sponsor
Robert C. Atkins Foundation
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 24, 2006 · Synced Sep 7, 2026, 1:04 AM 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 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Habitual Diet and Avocado Trial

NCT03528031
View directory record Official record
Conditions
Intra-abdominal Fat, Metabolic Syndrome, High Cholesterol, Triglycerides High, Diet Habit, High Blood Sugar, Liver Fat, Dietary Modification, HDL Cholesterol, Low Serum, Cardiovascular Diseases, High Density Lipoprotein Deficiency, Low-density-lipoprotein-type, Cardiovascular Risk Factor, Diabetes
Interventions
Intervention Daily Avocado
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
25 Years and older
Enrollment
1,008 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
4
States / cities
Loma Linda, California • Los Angeles, California • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Sep 7, 2026, 1:04 AM EDT
Completed Not applicable Interventional

Exercise and Nutrition on Obese Microbiome

NCT04138303
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Exercise Protocol, Calorie-Restrictive Low Carbohydrate Diet (CR-LC), Ancestral Diet (AD)
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 6, 2020 · Synced Sep 7, 2026, 1:04 AM EDT