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Showing 1–24 of 428 matching trials from the live ClinicalTrials.gov search.
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Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

NCT05387876
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D intervention, Placebo intervention
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 79 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 2, 2026, 7:22 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

VITamin D and OmegA-3 TriaL: Effects on Mammographic Density and Breast Tissue

NCT02239874
View directory record Official record
Conditions
Benign Breast Disease
Interventions
Vitamin D and fish oil placebo, Fish oil and vitamin D placebo, Vitamin D placebo and fish oil placebo, Vitamin D and fish oil
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
55 Years to 67 Years · Female only
Enrollment
3,894 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Sep 2, 2026, 7:22 PM EDT
Terminated Phase 4 Interventional

Intraduodenal Aspiration Study to Assess the Bioavailability of Oral Pancrecarb® Compared to Placebo Control

NCT00744250
View directory record Official record
Conditions
Exocrine Pancreatic Insufficiency, Chronic Pancreatitis, Cystic Fibrosis
Interventions
Pancrelipase
Drug
Lead sponsor
Digestive Care, Inc.
Industry
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 21, 2013 · Synced Sep 2, 2026, 7:22 PM EDT
Active, not recruiting Not applicable Interventional

Renal Metabolism in Salt-sensitive Human Blood Pressure

NCT05369416
View directory record Official record
Conditions
Hypertension
Interventions
Low sodium diet, high sodium diet
Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
30 Years to 65 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 12, 2025 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Phase 2 Interventional

RECOVER-AUTONOMIC: Platform Protocol, Appendix A (IVIG)

NCT06305793
View directory record Official record
Conditions
Long COVID, Long Coronavirus Disease 2019 (Covid19), Long Covid-19
Interventions
IVIG (intravenous immunoglobulin), IVIG Placebo, Coordinated Care, Usual Care
Drug · Behavioral
Lead sponsor
Kanecia Obie Zimmerman
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Results available

A Randomized, Double-Blind, Dose Response-Control, Crossover Study to Evaluate the Safety and Efficacy of Two Doses of EUR-1008 (APT-1008) in Chronic Pancreatitis (CP) Participants With Exocrine Pancreatic Insufficiency (EPI)

NCT00788593
View directory record Official record
Conditions
Chronic Pancreatitis, Exocrine Pancreatic Insufficiency
Interventions
Placebo, EUR-1008 (APT-1008) High Dose, EUR-1008 (APT-1008) Low Dose
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
9
States / cities
Little Rock, Arkansas • Los Angeles, California • Gainesville, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 11, 2014 · Synced Sep 2, 2026, 7:22 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Investigating the Cognitive and Brain Health Benefits of Lean Pork Consumption

NCT07031076
View directory record Official record
Conditions
Dietary Intervention, Dietary Proteins, Dietary Assessment, Older Adults (65 Years and Older), Cognitive Ability, General
Interventions
Ready-to-eat lean pork in frozen, 5-oz packages
Dietary Supplement
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
65 Years to 75 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 25, 2025 · Synced Sep 2, 2026, 7:22 PM EDT
Terminated Phase 3 Interventional Results available

Effect of Weight and Insulin Sensitivity on Reproductive Function in PCOS

NCT01482286
View directory record Official record
Conditions
Polycystic Ovary Syndrome
Interventions
Metformin, Dietary Restriction, Exercise Training
Drug · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
20 Years to 40 Years · Female only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 14, 2022 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of 21-day Purification Program on Healthy Adults

NCT05877365
View directory record Official record
Conditions
Healthy
Interventions
Standard Process 21-Day Purification Program
Dietary Supplement
Lead sponsor
Standard Process Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
West Palm Beach, Florida
Source: ClinicalTrials.gov public record
Updated Nov 13, 2024 · Synced Sep 2, 2026, 7:22 PM EDT
Terminated Phase 4 Interventional Results available

Pancreatic Enzyme Supplementation for Celiac Disease

NCT02475369
View directory record Official record
Conditions
Celiac Disease
Interventions
pancrelipase
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 11, 2021 · Synced Sep 2, 2026, 7:22 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Circadian Time Restricted Eating

NCT05628012
View directory record Official record
Conditions
Circadian Rhythm, Cardiometabolic Health, Weight Loss, Cardiovascular Health, Time Restricted Feeding
Interventions
Circadian Based Time Restricted Eating
Behavioral
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 40 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 2, 2024 · Synced Sep 2, 2026, 7:22 PM EDT
Completed No phase listed Observational

Breast Cancer Registry for Participants With Breast Cancer or Characteristics of Hereditary Breast Cancer

NCT00666731
View directory record Official record
Conditions
Breast Cancer, Precancerous Condition
Interventions
medical chart review, questionnaire administration, study of socioeconomic and demographic variables, Excess human biological tissue, quality-of-life assessment
Other · Procedure
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years to 120 Years
Enrollment
4,945 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
65
States / cities
Colorado Springs, Colorado • Denver, Colorado • Lakewood, Colorado + 46 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced Sep 2, 2026, 7:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Investigation Into the Effects Upon Brain Response to Change in Circulating Glucose Levels in Diabetes Mellitus

NCT00580710
View directory record Official record
Conditions
Type 1 Diabetes, Hypoglycemia
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years
Enrollment
164 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2018
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 17, 2022 · Synced Sep 2, 2026, 7:22 PM EDT
Recruiting Early Phase 1 Interventional

Time Restricted Eating in Sleep Apnea

NCT06047496
View directory record Official record
Conditions
Time Restricted Eating, Obstructive Sleep Apnea
Interventions
Time restricted eating
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 70 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jan 15, 2024 · Synced Sep 2, 2026, 7:22 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Complex Effects of Dietary Manipulation on Metabolic Function, Inflammation and Health

NCT02706262
View directory record Official record
Conditions
Obesity, Insulin Resistance
Interventions
Metabolically abnormal obese - Mediterranean diet, Metabolically abnormal obese - Low carbohydrate ketogenic diet, Metabolically abnormal obese - Plant-based, very-low-fat diet, Annual Follow-up Visits
Other · Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Gastrointestinal Sensorimotor Dysfunctions in Diabetes Mellitus

NCT02170870
View directory record Official record
Conditions
Dyspepsia, Diabetes Mellitus With Gastrointestinal Symptoms
Interventions
Exendin 9-39, Microlipid, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 22, 2019 · Synced Sep 2, 2026, 7:22 PM EDT
Recruiting No phase listed Observational

Understanding the Effects of Pulmonary Arterial Hypertension on Lean Muscle Mass

NCT07132788
View directory record Official record
Conditions
Pulmonary Hypertension
Interventions
blood draw, Short Performance Physical Battery, Grip strength test, Six minute walk test, Chest CT scan, Dual-Energy X-ray Absorptiometry Scan, Activity monitoring, 24 hour diet recall, Echocardiogram, Quality of Life Questionnaire (emPHasis 10), International Physical Activity Questionnaire Short Form (IPAQ-SF)
Diagnostic Test · Radiation · Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
2
States / cities
Philadelphia, Pennsylvania • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 2, 2026, 7:22 PM EDT
Active, not recruiting No phase listed Observational

Metagenomic Evaluation of the Gut Microbiome in Patients With Lynch Syndrome and Other Hereditary Colonic Polyposis Syndromes

NCT02371135
View directory record Official record
Conditions
Lynch Syndrome, Hereditary Colonic Polyposis Syndromes
Interventions
colonic biopsies, questionnaires
Genetic
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Fat Gain and Cardiovascular Disease Mechanisms

NCT00589498
View directory record Official record
Conditions
Hypertension, Sleep Apnea Syndromes, Obesity
Interventions
1000 extra calories
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 40 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 3, 2013 · Synced Sep 2, 2026, 7:22 PM EDT
Active, not recruiting Not applicable Interventional

Evaluating the Influence of Diet-induced Weight Loss on Fat (Adipose) Tissue's Insulin Sensitivity and Testosterone Synthesis in Women With Overweight or Obesity, Insulin Resistance, and Hyperandrogenemia

NCT06998238
View directory record Official record
Conditions
Overweight and Obesity, Hyperandrogenemia, Insulin Resistance
Interventions
Mediterranean-based, carbohydrate restricted, calorie reduced diet
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 2, 2026, 7:22 PM EDT
Withdrawn Not applicable Interventional

Isoleucine Addition Treatment Effects in a Controlled Diet Study

NCT07329088
View directory record Official record
Conditions
Prediabetes (Insulin Resistance, Impaired Glucose Tolerance), Metabolic Syndrome (MetS), Obesity & Overweight
Interventions
L-Isoleucine, Low-isoleucine diet
Dietary Supplement · Other
Lead sponsor
Jean L. Fry
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 2, 2026, 7:22 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Effect of Pumpkin Seeds on the Dietary Fatty Acid Intake and Blood Pressure in Women

NCT01928966
View directory record Official record
Conditions
Cardiovascular Disease, Blood Pressure
Interventions
Pumpkin Seeds
Other
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Weight Loss in Adults Over 50 with Obesity

NCT04014296
View directory record Official record
Conditions
Obesity
Interventions
High Protein Diet, Resistance Training
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
50 Years and older
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Oct 20, 2024 · Synced Sep 2, 2026, 7:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Role of a Dietary Supplement in Lowering SAH in Healthy Adults With Elevated Plasma SAH and Normal Homocysteine Levels

NCT05994794
View directory record Official record
Conditions
Elevated S-adenosylhomocysteine
Interventions
Alpha-GPC, Creatine and Ashwagandha (Sensoril®), Placebo
Dietary Supplement · Other
Lead sponsor
Standard Process Inc.
Industry
Eligibility
30 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
South Gate, California
Source: ClinicalTrials.gov public record
Updated Mar 6, 2024 · Synced Sep 2, 2026, 7:22 PM EDT