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Showing 1–24 of 170 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Flavonoids Clear all
Terminated Phase 2 Interventional Results available

Genistein Supplementation to Mitigate Cardiometabolic Dysfunction in Patients Undergoing Androgen Deprivation Therapy for Prostate Cancer

NCT02766478
View directory record Official record
Conditions
Prostate Cancer
Interventions
Genistein, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older · Male only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 26, 2022 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Use of (-)-Epicatechin in the Treatment of Becker Muscular Dystrophy (Pilot Study)

NCT01856868
View directory record Official record
Conditions
Becker Muscular Dystrophy
Interventions
(-)-epicatechin
Drug
Lead sponsor
Craig McDonald, MD
Other
Eligibility
18 Years to 60 Years · Male only
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 21, 2021 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

The Effects of California Strawberries on Parameters of Cardiovascular Health

NCT01705093
View directory record Official record
Conditions
Childhood Obesity, Cardiovascular Disease
Interventions
flavonoid-rich freeze-dried strawberry powder, macronutrient-matched control powder
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
14 Years to 18 Years · Male only
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jul 13, 2017 · Synced Sep 2, 2026, 2:18 PM EDT
Enrolling by invitation Phase 2 Interventional

Alleviation by Fisetin of Frailty, Inflammation, and Related Measures in Older Women

NCT03430037
View directory record Official record
Conditions
Frail Elderly Syndrome
Interventions
Fisetin, Placebo oral capsule
Dietary Supplement · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
70 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Phase 1 Interventional

A Pharmacokinetic Study of Genistein, a Tyrosine Kinase Inhibitor

NCT00001696
View directory record Official record
Conditions
Cancer
Interventions
Genistein
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Not listed
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2001
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Phase 2 Interventional

Fortifying Healthy Behaviors, Optimizing Medical Therapies and Enhancing Cognitive Function in Older Adults-pilot Study

NCT07000734
View directory record Official record
Conditions
Aging, Cognitive Decline, Older Adults, Cardiovascular, Sedentary Behaviors, Immune Senescence, Motor Function
Interventions
Risk managment, Dasatinib, Quercetin (dietary supplement), Vortioxetine
Behavioral · Drug · Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 2, 2026, 2:18 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effects of Quercetin on Metabolic Health

NCT05297032
View directory record Official record
Conditions
Quercetin, Lipid Metabolism, Aging
Interventions
Quercetin Phytosome
Dietary Supplement
Lead sponsor
Thorne HealthTech, Inc
Industry
Eligibility
20 Years to 70 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Summerville, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 9, 2023 · Synced Sep 2, 2026, 2:18 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 2, 2026, 2:18 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 2, 2026, 2:18 PM EDT
Completed Phase 1Phase 2 Interventional Results available

BIO 300 Non-Small Cell Lung Cancer Study

NCT02567799
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
BIO 300 Oral Suspension, Paclitaxel, Carboplatin, Radiotherapy
Drug · Radiation
Lead sponsor
Humanetics Corporation
Industry
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
4
States / cities
Baltimore, Maryland • Detroit, Michigan • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 24, 2024 · Synced Sep 2, 2026, 2:18 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 2, 2026, 2:18 PM EDT
Completed Phase 2 Interventional

Phase II Trial of Silymarin for Patients With Chronic Hepatitis C Who Have Failed Conventional Antiviral Treatment

NCT00680342
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
Silymarin, Placebo
Drug · Other
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
18 Years and older
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
5
States / cities
Boston, Massachusetts • Chapel Hill, North Carolina • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 17, 2013 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Soy Supplementation and Gestational Diabetes

NCT02806739
View directory record Official record
Conditions
Gestational Diabetes
Interventions
Soy Group (Soy Protein + Isoflavones), Control Group (Minimize Soy Intake)
Dietary Supplement
Lead sponsor
University of Massachusetts, Boston
Other
Eligibility
18 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Multi-Dose Safety and Pharmacokinetic Study of S-Equol in Healthy Volunteers

NCT00998920
View directory record Official record
Conditions
Healthy
Interventions
S-equol, Placebo
Drug
Lead sponsor
Ausio Pharmaceuticals, LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jul 11, 2012 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Not applicable Interventional

Effect of Revival Soy on Fibromyalgia Pain

NCT00279942
View directory record Official record
Conditions
Fibromyalgia
Interventions
Soy, Placebo
Dietary Supplement · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 76 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 5, 2012 · Synced Sep 2, 2026, 2:18 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 2, 2026, 2:18 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 2, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Dietary Nitric Oxide and Anthocyanins on Anaerobic Exercise Performance

NCT03631394
View directory record Official record
Conditions
Exercise
Interventions
beetroot and anthocyanin, beetroot and placebo
Other
Lead sponsor
Loma Linda University
Other
Eligibility
21 Years to 35 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated May 14, 2019 · Synced Sep 2, 2026, 2:18 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 2, 2026, 2:18 PM EDT
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers

RQC for the Prevention of Alzheimer's Disease and Retinal Amyloid-β

NCT06470061
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment, Cognitive Decline
Interventions
Resveratrol, Quercetin, and Curcumin (RQC), Curcumin
Drug
Lead sponsor
Zaparackas and Knepper LTD
Other
Eligibility
50 Years to 90 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 25, 2024 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Not applicable Interventional Results available

Effects of Botanical Microglia Modulators in Gulf War Illness

NCT02909686
View directory record Official record
Conditions
Gulf War Illness
Interventions
Boswellia Serrata, Curcumin, Epimedium, Fisetin, Luteolin, Nettle, Pycnogenol, Reishi Mushroom, Resveratrol, Placebo
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
39 Years to 65 Years · Male only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 23, 2025 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Proprietary Dietary Supplement on Fecal Volatile Organic Compounds

NCT02871596
View directory record Official record
Conditions
Healthy
Interventions
Placebo, Flavonoids, Flavonoids+Prebiotics
Other · Dietary Supplement
Lead sponsor
Pharmanex
Industry
Eligibility
18 Years to 70 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Logan, Utah
Source: ClinicalTrials.gov public record
Updated Feb 22, 2017 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Phase 2 Interventional Results available

Vitamin D and Soy Supplements in Treating Patients With Recurrent Prostate Cancer

NCT00499408
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin D, soy
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Sep 2, 2026, 2:18 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Modulation of Cerebral Blood Flow Using Quercetin, a Nutritional Supplement

NCT01376011
View directory record Official record
Conditions
Stroke, Problem of Aging
Interventions
quercetin/placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 27, 2015 · Synced Sep 2, 2026, 2:18 PM EDT