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Showing 1–24 of 67 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Vegetarian Diet Clear all
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Protein-Distinct Macronutrient-Equivalent Diet 1

NCT05577858
View directory record Official record
Conditions
Healthy Lifestyle
Interventions
Meat based, Pulse based
Other
Lead sponsor
South Dakota State University
Other
Eligibility
60 Years and older
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Brookings, South Dakota
Source: ClinicalTrials.gov public record
Updated Feb 16, 2025 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Impact of Beef on Muscle Fatigue in Older Adults

NCT05860088
View directory record Official record
Conditions
Muscle Weakness, Muscle; Fatigue, Heart, Older Adults
Interventions
Beef Diet, Vegetarian Diet
Other
Lead sponsor
Indiana University
Other
Eligibility
60 Years to 85 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 10, 2026, 1:45 PM EDT
Recruiting Not applicable Interventional

Using Continuous Glucose Monitoring to Quantify the Effects of NOURISH's Culturally Modified Meals on Asian Americans With Type 2 Diabetes

NCT06836479
View directory record Official record
Conditions
Type 2 Diabetes Mellitus (T2DM), Type 2 Diabetes
Interventions
NOURISH Diet, Self-Selected Diet (Control)
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 10, 2026, 1:45 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Lean Pork on Endothelial Function in Perimenopause

NCT06976112
View directory record Official record
Conditions
Cardiovascular Outcome, Overweight and Obese Women, Perimenopausal Women, Vasomotor Symptoms (VMS)
Interventions
Pork Diet, Plant Diet
Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
40 Years to 55 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 27, 2025 · Synced Sep 10, 2026, 1:45 PM EDT
Withdrawn Early Phase 1 Interventional

Evaluating the Combined Effect of Vedolizumab and Semi-Vegetarian Diet on Ulcerative Colitis.

NCT03309865
View directory record Official record
Conditions
Ulcerative Colitis, Dietary Modification
Interventions
semi-vegetarian diet, Vedolizumab Injection
Dietary Supplement · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 25, 2018 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional

Plant-Based Dietary Intervention in Type 2 Diabetes

NCT00276939
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Low-fat, low-Glycemic Index, vegan diet
Behavioral
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 6, 2012 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Phase 1 Interventional

Developing Biomarkers of Dietary Intake

NCT01237093
View directory record Official record
Conditions
Diet Therapy, Healthy Volunteers
Interventions
1. Meat, no fish or soda, 2. Meat and soda, no fish, 3. Meat and fish, no soda, 4. Meat and fish and soda, 5. Fish, no meat or soda, 6. Fish and soda, no meat, 7. No meat, fish or soda, 8. Soda, no meat or fish
Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years · Male only
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2020
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Novel Mobile Application to Assess Dietary Information

NCT03578458
View directory record Official record
Conditions
Dietary Assessment
Interventions
subjects will install a mobile app for use
Other
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
18 Years to 65 Years
Enrollment
132 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 23, 2019 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Differences in Eating Frequency Between Vegan and Omnivorous Diets

NCT02417480
View directory record Official record
Conditions
Eating Behavior
Interventions
Vegan diet, Follow habitual, usual diet
Behavioral
Lead sponsor
University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 17, 2019 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional

A Nutrition Intervention for Arthritis -3 (WCCR-ARTH3)

NCT03417648
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Plant-based diet, Supplement
Other
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years to 90 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Mar 3, 2019 · Synced Sep 10, 2026, 1:45 PM EDT
Recruiting Not applicable Interventional

The Medically Tailored Groceries and Mental Health Study

NCT07779707
View directory record Official record
Conditions
Depression / Major Depressive Disorder, Food Insecurity
Interventions
Medically Tailored, Home-delivered Groceries, Active Comparison Group: Monthly Grocery Gift Card
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
3
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 10, 2026, 1:45 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Making Meals With Pulses

NCT07451119
View directory record Official record
Conditions
Healthy Individuals
Interventions
Not listed
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
18 Years and older
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Supplementary Dietary Protein (21g Per Day) on Lean Mass and Strength in Sedentary, Adult Vegetarians

NCT04076982
View directory record Official record
Conditions
Muscle Weakness
Interventions
mung bean protein, control biscuit
Dietary Supplement · Other
Lead sponsor
Arizona State University
Other
Eligibility
18 Years to 55 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 10, 2026, 1:45 PM EDT
Suspended Not applicable Interventional

A Nutritional Intervention in Police Officers

NCT02651480
View directory record Official record
Conditions
Overweight, Blood Pressure, Diabetes Mellitus, Type 2
Interventions
Plant-based diet, Control Group
Dietary Supplement
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years to 90 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2026
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Sep 10, 2026, 1:45 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Adhering to Dietary Approaches for Personal Taste (ADAPT)

NCT03226938
View directory record Official record
Conditions
Dietary Habits
Interventions
Not listed
Lead sponsor
Tufts University
Other
Eligibility
18 Years and older
Enrollment
3,001 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 14, 2022 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional

A Nutrition Intervention for Arthritis -2

NCT01700881
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Plant-based diet, Supplement
Other
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years to 90 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2020
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 17, 2021 · Synced Sep 10, 2026, 1:45 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Healthy Eating for Reproductive Health: Greenville

NCT01716429
View directory record Official record
Conditions
Polycystic Ovarian Syndrome, Infertility, Obesity, Overweight
Interventions
Vegan diet, Low calorie diet
Behavioral
Lead sponsor
University of South Carolina
Other
Eligibility
18 Years to 35 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 17, 2019 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Twins Nutrition Study (TwiNS): Vegan vs. Omnivore

NCT05297825
View directory record Official record
Conditions
Lipid Metabolism, Glucose Intolerance, Weight Change, Body, Microbiome, Inflammation, Immune Function
Interventions
Vegan diet, Omnivore diet
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jan 11, 2024 · Synced Sep 10, 2026, 1:45 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The CARING Study: Creating and Restoring Health Through Nutrition Guidance

NCT05795439
View directory record Official record
Conditions
Type2diabetes, Type 2 Diabetes Treated With Insulin
Interventions
Low-fat, vegan diet
Behavioral
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years and older
Enrollment
700 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Replacing Starchy Vegetables and Refined Grains With Beef on Cardio-metabolic Disease Risk Factors (S53)

NCT03925142
View directory record Official record
Conditions
Diet Modification
Interventions
Controlled healthy vegetarian diet, Controlled beef diet
Other
Lead sponsor
Purdue University
Other
Eligibility
30 Years to 69 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 7, 2021 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cooking as a Health Behavior in College Students

NCT04084028
View directory record Official record
Conditions
Diet, Healthy
Interventions
Active Cooking Classes, Meal Kits, Recipes
Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
18 Years to 25 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Jul 7, 2021 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Consuming Red Meat on the Gut Microbiota in Young Adults

NCT03885544
View directory record Official record
Conditions
Diet Modification
Interventions
Controlled Lacto-ovo vegetarian diet, Controlled Unprocessed red meat diet, Controlled processed red meat diet
Other
Lead sponsor
Purdue University
Other
Eligibility
20 Years to 35 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 13, 2020 · Synced Sep 10, 2026, 1:45 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Diabetes Reversal Online Program and Study (DROP Study)

NCT05572502
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
plant-based diet
Behavioral
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Apr 17, 2024 · Synced Sep 10, 2026, 1:45 PM EDT
Completed Not applicable Interventional

A Nutritional Intervention for Diabetic Neuropathy (WCCR-DN2)

NCT01953757
View directory record Official record
Conditions
Diabetic Neuropathy
Interventions
Vegan diet and vitamin B12 supplement, Vitamin B12 supplement
Other · Dietary Supplement
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Apr 26, 2015 · Synced Sep 10, 2026, 1:45 PM EDT