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ClinicalTrials.gov public records Last synced Sep 15, 2026, 1:46 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Flavonoid Clear all
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 15, 2026, 1:46 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Advancing Niacin by Inhibiting Flushing (ANTI-FLUSH)

NCT00913081
View directory record Official record
Conditions
Flushing
Interventions
Quercetin, Placebo
Dietary Supplement
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 75 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 4, 2015 · Synced Sep 15, 2026, 1:46 PM EDT
Withdrawn Phase 2 Interventional

Milk Thistle in Body Dysmorphic Disorder

NCT02843451
View directory record Official record
Conditions
Body Dysmorphic Disorder
Interventions
Milk Thistle, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 27, 2022 · Synced Sep 15, 2026, 1:46 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Polyphenols and Cognitive Decline

NCT06507254
View directory record Official record
Conditions
Cognitive Decline, Cognitive Dysfunction
Interventions
Polyphenol Supplement, Placebo Supplement
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
50 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Dietary Flavonoids on Intestinal Microbiota, Intestinal Inflammation and Metabolic Syndrome

NCT02728570
View directory record Official record
Conditions
Metabolic Syndrome X, Inflammation
Interventions
High Dietary Flavonoids, Low Dietary Flavonoids
Other
Lead sponsor
Utah State University
Other
Eligibility
18 Years to 70 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Logan, Utah
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Not applicable Interventional

Effect of Grape Seed Extract Plus Ascorbic Acid on Endothelial Function

NCT00554242
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Grape seed extract and ascorbic acid
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
21 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 17, 2009 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 1 Interventional

Siliphos in Advanced Hepatocellular Carcinoma

NCT01129570
View directory record Official record
Conditions
Advanced Hepatocellular Carcinoma
Interventions
Silybin
Drug
Lead sponsor
Abby Siegel
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Sep 15, 2026, 1:46 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Sabroxy® Supplementation on Insulin Resistance and Cognitive Function in Adults With Mild Cognitive Impairment and Insulin Resistance

NCT07220694
View directory record Official record
Conditions
Insulin Resistance, Mild Cognitive Impairment, Cognitive Decline, Neurodegenerative Disorders
Interventions
Sabroxy®, Placebo
Dietary Supplement · Other
Lead sponsor
SF Research Institute, Inc.
Network
Eligibility
40 Years to 80 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 2 Interventional Results available

Quercetin Chemoprevention for Squamous Cell Carcinoma in Patients With Fanconi Anemia

NCT03476330
View directory record Official record
Conditions
Fanconi Anemia, Squamous Cell Carcinoma
Interventions
Quercetin (dietary supplement)
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
2 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 19, 2026 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Soy on Cognition and Hot Flashes in Men With Prostate Cancer Undergoing Testosterone Suppression Therapy

NCT00245518
View directory record Official record
Conditions
Hot Flashes
Interventions
Isoflavone, Placebos
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older · Male only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 12, 2017 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 1Phase 2 Interventional

A Clinical Research Study Designed To Determine If Treatment of Hepatitis C With Milk Thistle is More Effective Than No Treatment In Patients Infected With Both HIV And Hepatitis C

NCT00246363
View directory record Official record
Conditions
HIV Infections, Hepatitis C
Interventions
Silymarin, Placebo
Drug
Lead sponsor
Henry Sacks
Other
Eligibility
18 Years and older · Male only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 14, 2011 · Synced Sep 15, 2026, 1:46 PM EDT
Terminated Phase 2 Interventional Results available

Intravenous Milk Thistle (Silibinin-Legalon) for Hepatic Failure Induced by Amatoxin/Amanita Mushroom Poisoning

NCT00915681
View directory record Official record
Conditions
Amatoxin Poisoning, Amanita Poisoning, Mushroom Poisoning, Liver Failure
Interventions
Silibinin
Drug
Lead sponsor
Mylan Specialty, LP
Industry
Eligibility
Not listed
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2020
U.S. locations
2
States / cities
Somerset, New Jersey • Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 2 Interventional

Soy Protein Supplement In Treating Hot Flashes in Postmenopausal Women Receiving Tamoxifen for Breast Disease

NCT00031720
View directory record Official record
Conditions
Breast Cancer, Hot Flashes, Hot Flushes
Interventions
soy protein, isoflavones, Tamoxifen, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2013
U.S. locations
14
States / cities
Rockford, Illinois • Elkhart, Indiana • Kokomo, Indiana + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2016 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Black Tea Intake on Serum Lipids

NCT01882283
View directory record Official record
Conditions
Hypercholesterolemia
Interventions
Tea Treatment Group, Placebo
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
45 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2004
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 6, 2019 · Synced Sep 15, 2026, 1:46 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of Quercefit® and Ubiqsome™ in Mitigating Inflammation and Promoting Metabolic Health

NCT07760506
View directory record Official record
Conditions
Healthy Aging, Inflammaging, Metabolic Health, Quercetin, Coenzyme Q10
Interventions
Quercetin (dietary supplement), Coenzyme Q10, Rice Flour
Dietary Supplement
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
50 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 15, 2026, 1:46 PM EDT
Completed No phase listed Observational

Dietary Intake in Adults From the GA2LEN Folow-up Survey

NCT03251157
View directory record Official record
Conditions
Asthma, Lung Function Decreased, Food Allergy, Allergic Sensitisation, Allergic Rhinitis, COPD, Atopy
Interventions
Dietary intake of various nutrients, foods and biocompounds
Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
15 Years to 75 Years
Enrollment
3,500 participants
Timeline
2007 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 15, 2017 · Synced Sep 15, 2026, 1:46 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 15, 2026, 1:46 PM EDT
Completed Early Phase 1 Interventional Results available

COGNUTRIN in Breast Cancer Survivors

NCT01823991
View directory record Official record
Conditions
Breast Cancer
Interventions
VitaBlue™, Placebo, Lovaza®
Drug · Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 13, 2020 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Quercetin PK/PD Study in Healthy Adults and Patients With Hypercoagulable States

NCT01722669
View directory record Official record
Conditions
Healthy
Interventions
isoquercetin or quercetin
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 11, 2020 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Trial of Indole-3-Carbinol and Silibinin

NCT03687073
View directory record Official record
Conditions
Smoking
Interventions
Indole-3-Carbinol, Silibinin, Silibin
Drug
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 10, 2021 · Synced Sep 15, 2026, 1:46 PM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Effects of Hesperidin on Insulin Sensitivity

NCT01773486
View directory record Official record
Conditions
Obesity, Insulin Resistance
Interventions
Hesperidin, Placebo
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
21 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2022 · Synced Sep 15, 2026, 1:46 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

Carotenoid and Flavonoid Absorption From Red and Tangerine-Type Tomatoes

NCT01696773
View directory record Official record
Conditions
Carotenoid and Flavonoid Absorption
Interventions
Tangerine tomato juice, Red tomato juice
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 70 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 19, 2025 · Synced Sep 15, 2026, 1:46 PM EDT
Terminated Phase 2 Interventional

Genistein in Treating Patients With Localized Prostate Cancer Who Are Planning to Undergo Radical Prostatectomy

NCT00058266
View directory record Official record
Conditions
Prostate Cancer
Interventions
genistein, conventional surgery
Dietary Supplement · Procedure
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older · Male only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
5
States / cities
Chicago, Illinois • Evanston, Illinois • Harvey, Illinois + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2012 · Synced Sep 15, 2026, 1:46 PM EDT
Completed Phase 1 Interventional

Targeting Pro-Inflammatory Cells in Idiopathic Pulmonary Fibrosis: a Human Trial

NCT02874989
View directory record Official record
Conditions
Idiopathic Pulmonary Fibrosis (IPF)
Interventions
Dasatinib + Quercetin, Placebo
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
50 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
2
States / cities
Winston-Salem, North Carolina • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 15, 2026, 1:46 PM EDT