Independent directory Public ClinicalTrials.gov records United States
Clear filters
ClinicalTrials.gov public records Last synced Sep 1, 2026, 2:38 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 84 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Biomarkers Intervention Core

NCT05616585
Conditions
Biological Markers, Diet, Healthy, Metabolomics, Nutrition, Healthy
Interventions
Pharmacokinetic (PK)- Controlled Feeding Diet, Dose Response (DR)- Controlled Feeding Diet
Other
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older
Enrollment
115 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Completed Not applicable Interventional Accepts healthy volunteers

Trimethylamine-N-oxide Production and Metabolism

NCT02558673
Conditions
Healthy
Interventions
TMAO dietary precursors, Control (or active comparator)
Other
Lead sponsor
Cornell University
Other
Eligibility
21 Years to 50 Years · Male only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
Ithaca, New York
Completed Not applicable Interventional Accepts healthy volunteers

Beef Burger Versus a Vegetarian Burger

NCT04034160
Conditions
Inflammation
Interventions
vegetarian burger, beef burger
Other
Lead sponsor
Loma Linda University
Other
Eligibility
21 Years to 55 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Loma Linda, California
Conditions
Laceration of Hand, Laceration of Forearm
Interventions
Absorbable Surgical Gut Suture material, Non-absorbable Nylon Suture Material
Device
Lead sponsor
Kenneth Taylor, M.D.
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Hershey, Pennsylvania
Conditions
Inflammatory Bowel Diseases, Ulcerative Colitis, Crohn Disease
Interventions
Serum bovine immunoglobulin, Placebo
Dietary Supplement
Lead sponsor
Monisha Hitesh Shah
Other
Eligibility
6 Years to 30 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Houston, Texas
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Impact of High Dietary Fiber on Microbiome and Vaccine Responses

NCT05565586
Conditions
Influenza
Interventions
High-Fiber Diet (HFD), Prebiotic Food-Enriched Diet (PreFED)
Dietary Supplement
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
1
States / cities
Houston, Texas
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Evaluating Heart & Soil's Whole Package on Men's Health

NCT07256639
Conditions
Testosterone
Interventions
Heart and Soil's Whole Package
Dietary Supplement
Lead sponsor
Efforia, Inc
Industry
Eligibility
18 Years and older · Male only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
New York, New York
Completed Not applicable Interventional Accepts healthy volunteers Results available

Calcium Retention as Influenced by Dietary Components That Induce an Acid Load

NCT00620763
Conditions
Healthy
Interventions
High Meat - High Potential Renal Acid Load (PRAL) diet, Low Protein - Low Potential Renal Acid Load (PRAL) diet
Other
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
40 Years to 75 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Grand Forks, North Dakota
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Lean Beef Consumption on Cardiometabolic Health and Gut Microbiome

NCT06433115
Conditions
Diet Intervention
Interventions
Lean (≥90%) Grass-Fed Beef, Lean (≥90%) Grain-Fed Beef, Plant-Based Meat
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 45 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Columbia, Missouri
Conditions
Metabolic Syndrome, Cardiovascular Disease
Interventions
BOLD Diet, BOLD-X Diet, Modified DASH Diet
Dietary Supplement
Lead sponsor
Penn State University
Other
Eligibility
30 Years to 60 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
University Park, Pennsylvania
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
Completed Not applicable Interventional Accepts healthy volunteers

SWAP-MEAT: Study With Appetizing Plant Food - Meat Eating Alternatives Trial

NCT03718988
Conditions
Microbiome, Immune Function, Cardiovascular Diseases
Interventions
Meat products, Plant Alternative products
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Stanford, California
Completed Not applicable Interventional Accepts healthy volunteers

Lipoprotein Effects of Substituting Beef Protein for Carbohydrate

NCT00852267
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
Conditions
Cardiovascular Disease, Diabetes, Dyslipidemia
Interventions
Man-made Trans FA, Natural Trans FA, Oleic Acid
Dietary Supplement
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older · Male only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Oakland, California
Conditions
Protein Metabolism
Interventions
Beef, Tofu, Placebo
Other
Lead sponsor
Texas A&M University
Other
Eligibility
65 Years to 95 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
College Station, Texas
Conditions
Type 2 Diabetes Mellitus in Obese
Interventions
NDPR diet, USDA healthy eating diet
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Completed Phase 1 Interventional Accepts healthy volunteers Results available

The Effect of Acute Lysine Administration on α-aminoadipic Acid (Sub-study)

NCT03063476
Conditions
Healthy
Interventions
C-13 labeled Lysine, Normal saline
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 45 Years
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Nashville, Tennessee
Conditions
Omega 3 Fatty Acids
Interventions
Pastured Livestock Diet, Conventional Livestock Diet
Dietary Supplement
Lead sponsor
Utah State University
Other
Eligibility
30 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Logan, Utah
Completed Not applicable Interventional Accepts healthy volunteers

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

NCT03885544
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
Conditions
Eosinophilic Esophagitis
Interventions
Allergy Patch Testing
Device
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 90 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Intervention and Varying Physical Activity in Seniors

NCT01893684
Conditions
Obesity
Interventions
Exercise, Higher Protein Diet, Conventional Carbohydrate Diet
Behavioral
Lead sponsor
University of Georgia
Other
Eligibility
65 Years to 80 Years · Female only
Enrollment
81 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Athens, Georgia
Conditions
Protein, Diet, Skeletal Muscle
Interventions
PRO-A, PRO-B, PRO-C
Other
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
45 Years to 60 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Galveston, Texas
Conditions
Rheumatoid Arthritis (RA), Crohn's Disease (CD), Ulcerative Colitis (UC)
Interventions
Ketogenic diet, Carnivore (Lion) Diet
Behavioral
Lead sponsor
Fuller Research Foundation
Other
Eligibility
18 Years to 64 Years
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Charlottesville, Virginia
Completed Not applicable Interventional Accepts healthy volunteers

Are the "ounce-equivalents" in the Protein Foods Groups Really Equivalent?

NCT03142737
Conditions
Protein Metabolism
Interventions
Red kidney bean intake, Eggs intake, Peanut butter intake, Ground beef intake, Intact beef intake
Other
Lead sponsor
University of Arkansas
Other
Eligibility
20 Years to 40 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Little Rock, Arkansas