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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 1 Interventional

Effects of Dark Chocolate on Insulin Sensitivity in People With High Blood Pressure

NCT00099476
View directory record Official record
Conditions
Hypertension
Interventions
Effects of dark chocolate
Behavioral
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
21 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 1 Interventional

Safety, Metabolism, and Antioxidant Activity of Silymarin and Green Tea Extract in Patients With Chronic Hepatitis C

NCT01018615
View directory record Official record
Conditions
Chronic Hepatitis C, Oxidative Stress
Interventions
silymarin, green tea extract (EGCG)
Drug · Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

COcoa Supplement and Multivitamin Outcomes Study

NCT02422745
View directory record Official record
Conditions
Cardiovascular Disease, Cancer
Interventions
Cocoa extract, Multivitamin, Cocoa extract placebo, Multivitamin placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
60 Years and older
Enrollment
21,442 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2023
U.S. locations
2
States / cities
Boston, Massachusetts • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Food Matrix Effect on Flavanol Absorption, Metabolism and Excretion: Methylxanthines

NCT03526107
View directory record Official record
Conditions
Healthy
Interventions
CF Control, CF-Theobromine, CF-Caffeine
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 60 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
2
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Oct 9, 2022 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Gut-level Antiinflammatory Activities of Green Tea in Metabolic Syndrome

NCT03973996
View directory record Official record
Conditions
Dysbiosis, Endotoxemia, Metabolic Syndrome, Inflammation
Interventions
Green Tea Extract, Placebo
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional

Functional Outcomes in CondUction System Pacing and Right Ventricular Synchrony (FOCUS-Right)

NCT06601322
View directory record Official record
Conditions
Left Branch Bundle Block, RV - Right Ventricular Abnormality
Interventions
Pacemaker Interrogation and Electrocardiogram (ECG):, Cardiopulmonary Exercise Test (CPET) and Exercise Stress Cardiac Magnetic Resonance (ExeCMR, Continuous pacemaker telemetry (CPT)
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional

A One Visit Follow Up of Adults With Fabry Disease Who Started Long-term Enzyme Replacement Therapy As Children

NCT04002531
View directory record Official record
Conditions
Quality of Life, Renal Insufficiency, Cardiac Event
Interventions
General and Neurological examination, Vital signs, 12 lead electrocardiogram, Echocardiogram, Blood draw, Urine collection, 2-hour Holter Monitor, Brief Pain Inventory questionnaire, Quality of Life questionnaire
Other · Procedure
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 17, 2026, 8:09 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Biomarker-estimated Flavanol Intake in Davis (FID)

NCT06086145
View directory record Official record
Conditions
Healthy, Diet, Adults
Interventions
No intervention
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 75 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 2 Interventional

Interstitial Cystitis

NCT00056251
View directory record Official record
Conditions
Interstitial Cystitis
Interventions
H&P; ECG; Blood tests; voiding diary; Cystoscopy
Procedure
Lead sponsor
ICOS Corporation
Industry
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003
U.S. locations
24
States / cities
Anchorage, Alaska • Glendora, California • La Mesa, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Flavanol Absorption, Metabolism and Excretion From Fruit-based Drinks and Other Food Matrixes

NCT03526094
View directory record Official record
Conditions
Healthy
Interventions
Flavanols-capsules, Flavanol-banana blend, Flavanol-high protein drink, Flavanol-berry blend, Flavanol-sports drink, Flavanol-peanut butter toast, Flavanol-oats, Flavanol-yogurt, II- Flavanol drink, II- Flavanol drink + banana blend
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 60 Years · Male only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
2
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Oct 9, 2022 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Epicatechin-rich Cocoa on Collagen Synthesis

NCT03214133
View directory record Official record
Conditions
Collagen Synthesis
Interventions
Epicatechin-rich cocoa dose response, Epicatechin-rich cocoa vs placebo on performance
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 25 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Aug 2, 2021 · Synced Sep 17, 2026, 8:09 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Developing a Nutritional Supplement to Increase Collagen Synthesis in People

NCT06138106
View directory record Official record
Conditions
Dietary Supplements, Connective Tissue, Exercise
Interventions
Natural Product Supplement, Placebo control
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 2 Interventional Results available

(-)- Epicatechin Becker Muscular Dystrophy

NCT03236662
View directory record Official record
Conditions
Becker Muscular Dystrophy
Interventions
(-)-Epicatechin
Drug
Lead sponsor
Craig McDonald, MD
Other
Eligibility
18 Years to 70 Years · Male only
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Nov 23, 2021 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Prospective, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Effects of LasoperinTM on Cognitive Function in Healthy Adults

NCT05994391
View directory record Official record
Conditions
Cognitive Impairment, Cognitive Decline, Cognition Disorders in Old Age, Well-Being, Psychological, Inflammation, Cognitive Fun
Interventions
LasoperinTM, Placeo
Dietary Supplement
Lead sponsor
Lindenwood University
Other
Eligibility
30 Years to 60 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 15, 2023 · Synced Sep 17, 2026, 8:09 PM EDT
Recruiting Phase 1Phase 2 Interventional

Cocoa to Maximize Exercise Training in Older Adults - The COMET Trial

NCT07161726
View directory record Official record
Conditions
Mobility Disability
Interventions
(-)-Epicatechin-rich cocoa supplementation combined with exercise training, Placebo combined with exercise training
Combination Product
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
55 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Fish Oil and Green Tea Extract in Preventing Prostate Cancer in Patients Who Are at Risk for Developing Prostate Cancer

NCT00253643
View directory record Official record
Conditions
Precancerous Condition, Prostate Cancer
Interventions
green tea catechin extract, fish oil, placebo
Dietary Supplement · Other
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
21 Years to 120 Years · Male only
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2013
U.S. locations
3
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Green Tea and Reduction of Breast Cancer Risk

NCT00917735
View directory record Official record
Conditions
Breast Cancer
Interventions
Green tea extract supplement, Placebo
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
1,075 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2014
U.S. locations
5
States / cities
Edina, Minnesota • Maple Grove, Minnesota • Minneapolis, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 21, 2016 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Green Tea Confections For Managing Postprandial Hyperglycemia-Induced Vascular Endothelial Dysfunction

NCT01857258
View directory record Official record
Conditions
Hyperglycemia, Cardiovascular Disease
Interventions
Green Tea Concentrate
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 15, 2017 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 1 Interventional

Safety and Biomarker Response to (+)-Epicatechin in Becker Muscular Dystrophy

NCT04386304
View directory record Official record
Conditions
Becker Muscular Dystrophy
Interventions
(+)-Epicatechin
Drug
Lead sponsor
Epirium Bio Inc.
Industry
Eligibility
16 Years to 59 Years · Male only
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
3
States / cities
Los Angeles, California • Sacramento, California • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 22, 2022 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 1 Interventional

Defined Green Tea Catechin Extract in Treating Women With Hormone Receptor Negative Stage I-III Breast Cancer

NCT00516243
View directory record Official record
Conditions
Estrogen Receptor-negative Breast Cancer, Progesterone Receptor-negative Breast Cancer, Stage I Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer
Interventions
placebo, quality-of-life assessment, questionnaire administration, laboratory biomarker analysis, defined green tea catechin extract
Other · Procedure · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
21 Years to 65 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
4
States / cities
New York, New York • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 11, 2014 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gut Microbial Metabolites of Apple Polyphenols

NCT06107192
View directory record Official record
Conditions
Healthy, Controlled Feeding Trial
Interventions
Dietary intervention - apple catechin diet, Dietary intervention - low catechin diet
Other
Lead sponsor
University of Maryland, College Park
Other
Eligibility
18 Years to 45 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
College Park, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 21, 2025 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Dark Chocolate on Exercise Capacity, and Mitochondrial Structure and Function

NCT01671514
View directory record Official record
Conditions
Heart Failure, Type 2 Diabetes
Interventions
Epicatechin-enriched dark chocolate, Low-epicatechin dark chocolate
Dietary Supplement · Other
Lead sponsor
University of California, San Diego
Other
Eligibility
40 Years to 70 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Sep 17, 2026, 8:09 PM EDT
Completed Phase 1 Interventional

Defined Green Tea Catechin Extract in Preventing Esophageal Cancer in Patients With Barrett's Esophagus

NCT00233935
View directory record Official record
Conditions
Barrett Esophagus
Interventions
placebo, defined green tea catechin extract
Other · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
3
States / cities
New York, New York • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 10, 2014 · Synced Sep 17, 2026, 8:09 PM EDT
Active, not recruiting Phase 2 Interventional

To Evaluate if Green Tea Can be Effective in Reducing the Progression of Prostate Cancer in Men on Close Monitoring

NCT04597359
View directory record Official record
Conditions
Prostate Carcinoma
Interventions
Placebo Administration, Quality-of-Life Assessment, Questionnaire Administration, Sinecatechins
Drug · Other
Lead sponsor
ECOG-ACRIN Cancer Research Group
Network
Eligibility
21 Years and older
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
345
States / cities
Fairbanks, Alaska • Phoenix, Arizona • Fayetteville, Arkansas + 224 more
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 17, 2026, 8:09 PM EDT