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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Cocoa Extract Clear all
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 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Terminated Phase 1 Interventional

Placebo Controlled Study of Fecal Microbiota Transplant (FMT) for a First or Second Episode of C. Difficile Infection in Adults Using a Frozen Encapsulated Inoculum

NCT02343328
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Fecal Microbiota Transplant, Placebo
Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 12, 2017 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Chocolate Study 2.0

NCT04037020
View directory record Official record
Conditions
Normal Weight
Interventions
Chocolate
Other
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
18 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 10, 2025 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Intake-dependent Effect of Cocoa Flavanol Absorption, Metabolism and Excretion in Humans

NCT03201822
View directory record Official record
Conditions
Healthy
Interventions
100 mg of Cocoa Flavanols/70 kg BW, 200 mg of Cocoa Flavanols/70 kg BW, 400 mg of Cocoa Flavanols/70 kg BW, 1000 mg of Cocoa Flavanols/70 kg BW
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 40 Years · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jun 27, 2017 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Completed Not applicable Interventional

Effects of Cocoa on Ambulatory Blood Pressure and Vascular Function in Patients With Stage I Hypertension

NCT01672840
View directory record Official record
Conditions
Hypertension
Interventions
5g Cocoa Consumption, 10g Cocoa Consumption
Dietary Supplement
Lead sponsor
Griffin Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
2
States / cities
Derby, Connecticut • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 25, 2020 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Dark Chocolate on Visual Performance

NCT03326934
View directory record Official record
Conditions
Dietary Supplementation
Interventions
Dark chocolate, Milk Chocolate
Dietary Supplement
Lead sponsor
University of the Incarnate Word
Other
Eligibility
18 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 17, 2019 · Synced Sep 23, 2026, 12:41 PM EDT
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 23, 2026, 12:41 PM EDT
Completed Not applicable Interventional

Effects of Epicatechin on Functional Capacity, Skeletal Muscle Structure and Diastolic Function in Patients With Heart Failure With Preserved Ejection Fraction (HFPEF)

NCT02068040
View directory record Official record
Conditions
Heart Failure
Interventions
CocoaVia
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
40 Years to 60 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Sep 23, 2026, 12:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

An Exploratory Investigation of a Supplement to Enhance Sleep Quality and Quantity

NCT05521243
View directory record Official record
Conditions
Sleep, Sleep Disturbance, Sleep Hygiene
Interventions
Beam Organics Dream Powder, Beam Organics Dream Powder Extra Strength, Placebo
Dietary Supplement
Lead sponsor
Beam
Industry
Eligibility
24 Years to 50 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Nov 7, 2022 · Synced Sep 23, 2026, 12:41 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Cocoa-rich Bioflavanol Supplementation Effects During Cold Exposure

NCT04359082
View directory record Official record
Conditions
Cold Exposure, Manual Dexterity, Gut Microbiome
Interventions
CocoaVia supplement, Placebo Pill
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 49 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 29, 2021 · Synced Sep 23, 2026, 12:41 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Study Assessing the Effect of Chocolate Consumption in Subjects With A History of Acne Vulgaris

NCT01193764
View directory record Official record
Conditions
Acne
Interventions
100% cocoa powder, gelatin (Gelita)
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 19, 2019 · Synced Sep 23, 2026, 12:41 PM EDT
Recruiting Phase 3 Interventional

The COCOA-PAD II Trial

NCT04794530
View directory record Official record
Conditions
Peripheral Artery Disease
Interventions
cocoa flavanols, placebo
Drug
Lead sponsor
Northwestern University
Other
Eligibility
55 Years and older
Enrollment
190 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
3
States / cities
Chicago, Illinois • Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

An Exploratory Investigation of a B12 Vitamin to Increase Energy and Focus

NCT05517005
View directory record Official record
Conditions
B12 Deficiency Vitamin, Energy Supply; Deficiency, Mood
Interventions
Hype Bites Supplement
Dietary Supplement
Lead sponsor
Sourse
Industry
Eligibility
24 Years to 65 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Aug 22, 2024 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Completed Phase 1 Interventional

Effect of Cocoa Flavanols on Vascular Function

NCT00553774
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Cocoa Flavanols, Placebo
Dietary Supplement · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 100 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 23, 2026, 12:41 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 23, 2026, 12:41 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Nutrition to Support Postoperative Recovery

NCT07109505
View directory record Official record
Conditions
Postoperative Care, Postoperative Complications, Cognition, Nutritional Assessment, Nutritional Intervention
Interventions
Nutritional Shake, Nutritional Instructions Only
Dietary Supplement · Other
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
70 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Feb 10, 2026 · Synced Sep 23, 2026, 12:41 PM EDT