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Showing 1–24 of 65 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Diet, Carbohydrate-Restricted Clear all
Completed Phase 2 Interventional

Effectiveness of a Low Carbohydrate Diet Versus a High Carbohydrate Diet in Promoting Weight Loss and Improved Health

NCT00200720
View directory record Official record
Conditions
Obesity, Hypertension
Interventions
Atkins diet (low carbohydrate diet), DASH diet (high carbohydrate diet)
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
21 Years and older
Enrollment
260 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 5, 2012 · Synced Sep 15, 2026, 2:44 PM EDT
Terminated Not applicable Interventional

A Study of a Low-Carbohydrate Diet to Improve Maternal Health After Childbirth

NCT04045353
View directory record Official record
Conditions
Obesity, Postpartum Weight Retention, Insulin Sensitivity
Interventions
Low carbohydrate diet education, Low carbohydrate diet education with behavioral component
Behavioral
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 17, 2023 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional

A Carbohydrate-restricted Diet to Reverse Fatty Liver in Adolescents With Obesity

NCT02787668
View directory record Official record
Conditions
Non-alcoholic Fatty Liver Disease, Childhood Obesity, Insulin Resistance
Interventions
Carbohydrate-restricted diet, Control, low-fat diet
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
9 Years to 17 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Feb 20, 2022 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Phase 4 Interventional

A Very High Fiber Diet Versus a Low-carbohydrate Diet for Weight Loss

NCT01051674
View directory record Official record
Conditions
Obesity, Type 2 Diabetes
Interventions
High fiber vs. low-carbohydrate diets
Other
Lead sponsor
Loma Linda University
Other
Eligibility
18 Years and older
Enrollment
173 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jun 30, 2014 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Results available

Continuous Glucose Monitoring (CGM) With a Low Carbohydrate Diet to Reduce Weight in Patients With Pre-Diabetes

NCT03695913
View directory record Official record
Conditions
Pre-diabetes
Interventions
Normal Diet, Low carb diet, CGM with no real time feedback, CGM with real time feedback), Education material
Other · Device · Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
21 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Livonia, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 15, 2020 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional

The Lifestyle Education About Prediabetes (Leap) Study

NCT05235425
View directory record Official record
Conditions
PreDiabetes
Interventions
Standard NDPP, Very low-carbohydrate diet
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
21 Years to 75 Years
Enrollment
304 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Development of an Adaptive Treatment for Weight Loss in People With Prediabetes

NCT04745572
View directory record Official record
Conditions
PreDiabetes, Obesity
Interventions
High Carbohydrate Diet, Reduced Carbohydrate Diet
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 75 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Results available

Intermittent Fasting and a No-Sugar Diet for Long COVID Symptoms

NCT06214455
View directory record Official record
Conditions
Long Covid19, Long COVID
Interventions
Low sugar diet and 10-12 hour eating window, Low sugar diet, 8 hour eating window and fasting
Other
Lead sponsor
Pacific Northwest University of Health Sciences
Other
Eligibility
19 Years to 69 Years
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
2
States / cities
Boulder, Colorado • Yakima, Washington
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 15, 2026, 2:44 PM 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 15, 2026, 2:44 PM EDT
Terminated No phase listed Observational

Study of the Effect of a Very-Low-Carbohydrate Diet on Energy Expenditure

NCT01967563
View directory record Official record
Conditions
Obesity, Appetite, Healthy Volunteers
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 50 Years · Male only
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 21, 2025 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional

Low-Carb/Time-restricted Feeding Protocol in Insulin-Using Type 2 Diabetics

NCT04558827
View directory record Official record
Conditions
Type2 Diabetes
Interventions
Low Carbohydrate Diet, Time Restricted Feeding
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
3
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 13, 2022 · Synced Sep 15, 2026, 2:44 PM EDT
Recruiting Not applicable Interventional

Type 1 Diabetes Management Using a Very Low Carbohydrate Versus Standard Diet

NCT03710928
View directory record Official record
Conditions
Type1diabetes
Interventions
very low carbohydrate diet, standard carbohydrate diet
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Sep 15, 2026, 2:44 PM EDT
Recruiting Not applicable Interventional

Very Low Carbohydrate Diets and Glucagon Response in T1DM

NCT04200391
View directory record Official record
Conditions
Type1diabetes
Interventions
Very low carbohydrate diet
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Sep 15, 2026, 2:44 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Diet and Migraine Study

NCT01859052
View directory record Official record
Conditions
Migraine, Obesity
Interventions
Low carbohydrate diet, Low calorie low fat diet, AHA diet recommendations
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
19 Years to 49 Years · Female only
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 1, 2015 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Testing the Effect of Multiple Weight Management Modalities for Chronic Disease Risk Reduction in a Clinical Setting

NCT03998878
View directory record Official record
Conditions
Obesity
Interventions
Low-Carbohydrate Diet, Intermittent Energy Restriction, Hunger Training
Behavioral
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Dec 16, 2021 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional

Diabetes Dietary Study- Low Carbohydrate and Low-Fat Diets in Type 2 Diabetes

NCT00795691
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
low-carbohydrate diet, low-fat diet
Behavioral
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 11, 2019 · Synced Sep 15, 2026, 2:44 PM 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 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional

Understanding the Paradoxical Rise in Blood Glucose in the Context of a Low-carbohydrate Diet

NCT07713316
View directory record Official record
Conditions
Elevated Blood Glucose, Low-carbohydrate Diet
Interventions
Carbohydrate Drink, Fat Drink, Protein Drink
Dietary Supplement
Lead sponsor
Brigham Young University
Other
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Provo, Utah
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Results available

Ketogenic Diet in Advanced Cancer

NCT01716468
View directory record Official record
Conditions
Cancer
Interventions
Ketogenic Diet
Other
Lead sponsor
VA Pittsburgh Healthcare System
Federal
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 8, 2016 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Low Fat Versus Low Carbohydrate Diets on Energy Metabolism

NCT03878108
View directory record Official record
Conditions
Healthy, Healthy Volunteers
Interventions
LCHF diet, LFHC diet
Dietary Supplement
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 50 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Sep 15, 2026, 2:44 PM EDT
Terminated Phase 2 Interventional

Atkins Diet and Prostate Cancer Clinical Trial

NCT00932672
View directory record Official record
Conditions
Prostate Cancer
Interventions
Atkins Diet
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older · Male only
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
3
States / cities
Los Angeles, California • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 6, 2015 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Optimal Metabolic Health Through Continuous Glucose Monitoring

NCT04920058
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Continuous Glucose Monitor, <Active Comparator?>
Device · Other
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 69 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Wesley Chapel, Florida
Source: ClinicalTrials.gov public record
Updated Nov 14, 2022 · Synced Sep 15, 2026, 2:44 PM EDT
Recruiting Not applicable Interventional

Effects of Ketosis on Brain Function in Patients With T1DM

NCT04219709
View directory record Official record
Conditions
Type1diabetes
Interventions
Very low carbohydrate diet, Standard carbohydrate diet
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Sep 15, 2026, 2:44 PM EDT
Completed Not applicable Interventional Results available

Effect of Low Carbohydrate Versus Low Fat Diet in the Treatment of Dyslipidemia in Obese Children With Metabolic Syndrome

NCT03937960
View directory record Official record
Conditions
Metabolic Syndrome, Obesity, Dyslipidemias
Interventions
Carbohydrate restricted group, Standard low fat diet
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
10 Years to 18 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
2
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Dec 21, 2022 · Synced Sep 15, 2026, 2:44 PM EDT