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Showing 1–24 of 412 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Low Carbohydrate Diet Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Obesity Risk in African American Women is Determined by a Diet-by-phenotype Interaction

NCT03499509
View directory record Official record
Conditions
Diet Modification
Interventions
Low Glycemic Diet, High Glycemic Diet
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years to 65 Years · Female only
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 17, 2025 · Synced Sep 4, 2026, 11:50 AM EDT
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 4, 2026, 11:50 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Low-calorie Diet in Isolated Impaired Fasting Glucose

NCT06451055
View directory record Official record
Conditions
Isolated Impaired Fasting Glucose
Interventions
Low-calorie diet, Routine dietary and physical activity habits
Behavioral
Lead sponsor
Emory University
Other
Eligibility
35 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
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 4, 2026, 11:50 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 4, 2026, 11:50 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 4, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Calorie Restricted, Very Low Fat Plant-based Diet and Multi-component Exercise Program on Metabolic Health

NCT02706288
View directory record Official record
Conditions
Obesity, Insulin Resistance
Interventions
Weight loss with very low fat plant-based diet and regular exercise
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 7, 2022 · Synced Sep 4, 2026, 11:50 AM EDT
Suspended Not applicable Interventional Accepts healthy volunteers

The Effect of Nutritional Supplementation on Actinic Purpura: A Pilot Study

NCT06840574
View directory record Official record
Conditions
Skin Health, Skin Aging of Face and Hands, Healthy, Ecchymosis
Interventions
Cyruta Plus: A Whole-Food Based Vitamin C supplement containing organic buckwheat (aerial parts) juice powder, organic buckwheat flour, bovine adrenal Cytosol™ extract, oat flour, honey, ascorbic acid, Low Dose Vitamin C, High Dose Vitamin C
Dietary Supplement
Lead sponsor
Standard Process Inc.
Industry
Eligibility
55 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Characterization of a Portable Solid-State Breath Acetone Testing Device for Real-Time Ketosis Status

NCT04130724
View directory record Official record
Conditions
Ketogenic Dieting, Ketosis
Interventions
Blood ketone testing, Breath ketone testing
Diagnostic Test
Lead sponsor
Readout, Inc.
Industry
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Sep 4, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet / Gut Microbiome Interaction and Influence on Inflammatory Disease in HIV Patients

NCT02610374
View directory record Official record
Conditions
HIV
Interventions
Agrarian Diet, Western-type Diet
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 20, 2022 · Synced Sep 4, 2026, 11:50 AM EDT
Completed Not applicable Interventional Results available

(R33 Phase) DELISH Study: Diabetes Education to Lower Insulin, Sugars, and Hunger

NCT03837405
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Carbohydrate-restricted diet, Mindfuless
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
Completed Phase 3 Interventional

Internet Administration of the Modified Atkins Diet for Adults With Intractable Epilepsy

NCT00436631
View directory record Official record
Conditions
Epilepsy
Interventions
Dietary management of seizures
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 1, 2015 · Synced Sep 4, 2026, 11:50 AM EDT
Completed No phase listed Observational

Positron Emission Tomography for the Diagnosis of Immune Checkpoint Inhibitor-Related Myocarditis

NCT05062395
View directory record Official record
Conditions
Myocarditis Acute
Interventions
Computed Tomography, Fludeoxyglucose F-18, Low Carbohydrate High Fat Diet, Positron Emission Tomography
Procedure · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 9, 2023 · Synced Sep 4, 2026, 11:50 AM EDT
Active, not recruiting Not applicable Interventional

Effect of VLCD on the Reduction of Liver Steatosis and Fibrosis in Subjects With Obesity and NAFLD

NCT04861571
View directory record Official record
Conditions
NAFLD
Interventions
Dietary intervention with very low calorie diet (VLCD), Control Arm
Dietary Supplement · Other
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
Terminated Not applicable Interventional

Evaluating Dietary Intervention Before surgicaL Treatment for Epilepsy

NCT02261753
View directory record Official record
Conditions
Cortical Dysplasia
Interventions
Classical ketogenic diet
Dietary Supplement
Lead sponsor
University College, London
Other
Eligibility
3 Years to 15 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 24, 2017 · Synced Sep 4, 2026, 11:50 AM EDT
Recruiting Not applicable Interventional

Impact of Ketogenic Diet on Tumor Microenvironment in Patients With Breast Cancer

NCT07574671
View directory record Official record
Conditions
Breast Cancer
Interventions
Ketogenic diet
Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
Completed Not applicable Interventional Results available

Investigating Racial Differences in Diet Benefits for Knee Osteoarthritis

NCT04343716
View directory record Official record
Conditions
Knee Osteoarthritis
Interventions
Low-carbohydrate diet
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
65 Years to 75 Years · Female only
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
Not yet recruiting Not applicable Interventional

Ketogenic Approach to Restore Muscle in Older Patients With Community-Acquired Pneumonia - KARMA-P Trial

NCT07308483
View directory record Official record
Conditions
Pneumonia
Interventions
Ketogenic feeding, Standard feeding
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
55 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Sep 4, 2026, 11:50 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Small Extracellular Vesicles and Insulin Action

NCT05933707
View directory record Official record
Conditions
Obesity, Insulin Resistance, Metabolically Healthy Obesity, Obesity, Metabolically Benign
Interventions
People with Metabolically Unhealthy Obesity - Low Calorie Diet
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
25 Years to 55 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 4, 2026, 11:50 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 4, 2026, 11:50 AM EDT
Completed Not applicable Interventional

Nutrition for Asthmatics with Obesity

NCT05222451
View directory record Official record
Conditions
Asthma, Obesity
Interventions
DGA Diet, MCT Diet, KETO Diet
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 3, 2025 · Synced Sep 4, 2026, 11:50 AM EDT
Active, not recruiting Not applicable Interventional

Diet and Health in Adults With Metabolic Syndrome

NCT03935048
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Higher protein, low glycemic load diet
Dietary Supplement
Lead sponsor
University of Arkansas, Fayetteville
Other
Eligibility
18 Years to 85 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Fayetteville, Arkansas
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced Sep 4, 2026, 11:50 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Bioavailability Study of Hemp Phenolics

NCT06098001
View directory record Official record
Conditions
Bioavailability, Metabolites, Excretion
Interventions
Low dose dietary fiber, High dose dietary fiber
Dietary Supplement
Lead sponsor
Brightseed
Industry
Eligibility
18 Years to 45 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 23, 2023 · Synced Sep 4, 2026, 11:50 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 4, 2026, 11:50 AM EDT