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Showing 1–15 of 15 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Flavanols-capsules Clear all
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, 6:02 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, 6:02 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, 6:02 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Long Term Cocoa Flavanol Intake on Blood Pressure and Platelet Function in Healthy Adults, Part 1

NCT02447770
View directory record Official record
Conditions
Healthy
Interventions
Mars Cocoa Extract Capsules
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
30 Years to 55 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 8, 2026, 6:02 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

COcoa Supplement and Multivitamin Outcomes Study: Effects on Falls and Physical Performance

NCT05232669
View directory record Official record
Conditions
Fall, Physical Performance, Fracture
Interventions
Cocoa extract, Cocoa extract placebo, Multivitamin, 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
2021 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 8, 2026, 6:02 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 8, 2026, 6:02 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 8, 2026, 6:02 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 8, 2026, 6:02 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Long Term Cocoa Flavanol Intake on Blood Pressure and Platelet Function in Healthy Adults, Part 2

NCT02447783
View directory record Official record
Conditions
Healthy
Interventions
Control Capsules, Mars Cocoa Extract Capsules
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
30 Years to 55 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 8, 2026, 6:02 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 8, 2026, 6:02 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dietary Flavanols and Dentate Gyrus Function

NCT02312310
View directory record Official record
Conditions
Memory Loss
Interventions
Cocoa Flavanol
Dietary Supplement
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
50 Years to 75 Years
Enrollment
211 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 10, 2020 · Synced Sep 8, 2026, 6:02 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Modulation of Neuroinflammation in Age-Related Memory Disorders

NCT03723694
View directory record Official record
Conditions
Memory Loss, Inflammation
Interventions
650 mg of Cocoapro flavanols, 0 mg of Cocoapro flavanols
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
50 Years to 69 Years
Enrollment
259 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 26, 2024 · Synced Sep 8, 2026, 6:02 PM EDT
Completed Phase 1 Interventional

Physiological Effects of Grape Seed Extract in Diastolic Heart Failure

NCT01185067
View directory record Official record
Conditions
Diastolic Heart Failure, Hypertensive Heart Disease, Heart Failure With Preserved Ejection Fraction, Hypertension, Oxidative Stress
Interventions
grape seed extract (MegaNatural BP, Polyphenolics, Inc.)
Drug
Lead sponsor
University of Michigan
Other
Eligibility
50 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 5, 2017 · Synced Sep 8, 2026, 6:02 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Cocoa Flavanols for Modulating Immune Response and Accelerating Recovery

NCT03123068
View directory record Official record
Conditions
Surgical Recovery
Interventions
CocoaVia®, Placebo
Drug · Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 90 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 12, 2022 · Synced Sep 8, 2026, 6:02 PM EDT
Recruiting Not applicable Interventional

Cocoa Extract for Migraine Trial

NCT06808230
View directory record Official record
Conditions
Migraine
Interventions
Cocoa extract, Cocoa extract placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 8, 2026, 6:02 PM EDT