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Showing 1–24 of 69 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Cocoa Extract Clear all
Completed Phase 4 Interventional Results available

Antitussive Effect of a Naturally Flavored Syrup Containing Diphenhydramine, Compared With Dextromethorphan and Placebo

NCT02062710
View directory record Official record
Conditions
Cough Reflex Sensitivity
Interventions
diphenhydramine/phenylephrine/cocoa; dextromethorophan; placebo, diphenhydramine/phenylephrine/cocoa; placebo; dextromethorphan, dextromethorphan; diphenhydramine/phenylephrine/cocoa; placebo, dextromethorophan; placebo; diphenhydramine/phenylephrine/cocoa, placebo; diphenhydramine/phenylephrine/cocoa; dextromethorphan, placebo; dextromethorphan; diphenhydramine/phenylephrine/cocoa
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Feb 27, 2018 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

An Evaluation of the Effects of a Non-Caffeinated Energy Dietary Supplement

NCT04895800
View directory record Official record
Conditions
Health Behavior
Interventions
Phytovive, Placebo, Caffeine
Dietary Supplement
Lead sponsor
Nova Southeastern University
Other
Eligibility
18 Years to 50 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Davie, Florida
Source: ClinicalTrials.gov public record
Updated Jun 8, 2021 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigating the Effects of Cocoa Flavanol on Cognition Assessed Online

NCT04582617
View directory record Official record
Conditions
Aging, Cognitive Change
Interventions
Cocoa Extract, Cocoa Extract Placebo, Multivitamin, Multivitamin placebo
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
65 Years and older
Enrollment
3,959 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
2
States / cities
Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 6, 2023 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Randomized Controlled Cocoa-Appetite Trial

NCT02408289
View directory record Official record
Conditions
Obesity
Interventions
Lo-Flav, Hi-Flav, Epicatechin, Procyanidins
Dietary Supplement
Lead sponsor
Brooklyn College of the City University of New York
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Jan 12, 2016 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Results available

Collaborative Care for Older Adults With Back Pain (COCOA)

NCT01312233
View directory record Official record
Conditions
Low Back Pain
Interventions
Medical Care, Dual Care, Shared Care
Other
Lead sponsor
Palmer College of Chiropractic
Other
Eligibility
65 Years and older
Enrollment
131 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
2
States / cities
Davenport, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced Sep 8, 2026, 3:34 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 8, 2026, 3:34 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

COcoa Supplement and Multivitamin Outcomes Study for the Mind

NCT03035201
View directory record Official record
Conditions
Cognitive Impairment, Dementia, Aging
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
65 Years and older
Enrollment
2,262 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 21, 2023 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional

Cocoa Polyphenols and Postprandial Metabolism in Type 2 Diabetes

NCT01886989
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Cocoa polyphenols
Dietary Supplement
Lead sponsor
Arpita Basu
Other
Eligibility
21 Years to 60 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Sep 8, 2026, 3:34 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 8, 2026, 3:34 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Fecal Microbiota Transplant for Improvement of Metabolism

NCT02530385
View directory record Official record
Conditions
Obesity
Interventions
Placebo Capsules, FMT Capsules
Other · Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
25 Years to 60 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 24, 2019 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Cocoa and Endothelial Function in Adults With Elevated BMI

NCT00538083
View directory record Official record
Conditions
Cardioprotection
Interventions
Chocolate
Other
Lead sponsor
Griffin Hospital
Other
Eligibility
30 Years to 75 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Derby, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 25, 2020 · Synced Sep 8, 2026, 3:34 PM EDT
Completed No phase listed Observational

Cocoa, Polyphenols, and the Kidney in Healthy Subjects and in Subjects With Hypertension and Diabetes Mellitus

NCT00639665
View directory record Official record
Conditions
Diabetes
Interventions
Cocoa
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 85 Years
Enrollment
228 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 30, 2015 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Daily Intake of Cocoa Flavanols and Arterial Stiffness in Humans

NCT03587883
View directory record Official record
Conditions
Healthy
Interventions
Cocoa flavanols I, Control I, Cocoa flavanols II, Control II
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 19, 2022 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Dark Chocolate (70% Cacao) on EEG Brain Waves in Vigorously Active Individuals

NCT03203824
View directory record Official record
Conditions
Healthy
Interventions
dark chocolate, non dark chocolate
Dietary Supplement · Other
Lead sponsor
Loma Linda University
Other
Eligibility
21 Years to 45 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jun 24, 2018 · Synced Sep 8, 2026, 3:34 PM EDT
Active, not recruiting Phase 2 Interventional

Fecal Microbiota Transplant as Treatment of Hepatic Encephalopathy

NCT03420482
View directory record Official record
Conditions
Hepatic Encephalopathy
Interventions
Fecal Microbiota Transplant (FMT) oral capsules, Placebo oral capsule
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 30, 2025 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional

Flavanol-Rich Cocoa and Cerebral Blood Flow

NCT00825695
View directory record Official record
Conditions
Hypertension, Diabetes
Interventions
cocoa
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
65 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 29, 2014 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional

Effects of Polyphenolic-rich Dark Chocolate/Cocoa and Almonds on Cardiovascular Disease Risk Factors

NCT01882881
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Healthy American Control Diet, Dark Chocolate/Cocoa Diet, Almond Diet, Dark Chocolate/Cocoa + Almond Diet
Other
Lead sponsor
Penn State University
Other
Eligibility
30 Years to 70 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 20, 2023 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Pomegranate Juice Consumption on the Health of Mothers and Infants During Breastfeeding

NCT04341961
View directory record Official record
Conditions
Breastfeeding
Interventions
Pomegranate Juice
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 3, 2020 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Soft Tissue Therapy and Exercise on Hamstring Tightness

NCT03651141
View directory record Official record
Conditions
Hamstring Tightness, Myofascial Pain, Musculoskeletal Pain
Interventions
Neurodynamic Sliding, Myofascial Decompression, Diathermy
Other
Lead sponsor
Oklahoma State University
Other
Eligibility
18 Years to 25 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Aug 30, 2018 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Xoçai Antioxidant Supplements on Atherosclerosis Risk Factors

NCT00666250
View directory record Official record
Conditions
Hypertension, Dyslipidemia, Hyperglycemia
Interventions
Xocai Activ drink
Dietary Supplement
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 95 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 7, 2016 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Role of Flavanols in Exercise and Aging

NCT01557738
View directory record Official record
Conditions
Aging
Interventions
High Flavanol Trial, Low Flavanol Trial, High Flavanol Trial; long-term, Low Flavanol Trial; long-term effects
Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jun 24, 2014 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Results available

Cocoa to Improve Walking Performance in Peripheral Artery Disease

NCT02876887
View directory record Official record
Conditions
Peripheral Artery Disease
Interventions
Cocoa, Placebo
Drug
Lead sponsor
Northwestern University
Other
Eligibility
60 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 5, 2020 · Synced Sep 8, 2026, 3:34 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Black Forest Cocoa Flavanol Supplementation and Health Trial

NCT07747714
View directory record Official record
Conditions
Endothelial Function, Oxidative Stress, Inflamation, Vascular Health
Interventions
Cocoa Flavanol Supplement, Low-Flavanol Control Powder
Dietary Supplement
Lead sponsor
The Black Forest LLC
Industry
Eligibility
30 Years to 75 Years · Male only
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
2
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 8, 2026, 3:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Absorption, Metabolism and Excretion of Dietary Polyphenolic Bioactives in Humans

NCT03194620
View directory record Official record
Conditions
Healthy
Interventions
Thearubigins, Theaflavins, Procyanidin Dimer B2 (DB2), (-)-Epigallocatechin-3-O-gallate (EGCG), (-)-Epicatechin-3-O-gallate (ECG), (-)-Epicatechin (EC), (-)-Epigallocatechin (EGC), Control
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 60 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Sep 8, 2026, 3:34 PM EDT