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Showing 1–24 of 27 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: quercetin/placebo Clear all
Completed Phase 2 Interventional Results available

Fixed Dose Flavonoid Isoquercetin on Thrombo-Inflammatory Biomarkers in Subjects With Stable Sickle Cell Disease

NCT04514510
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Isoquercetin, Placebo
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 70 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 1, 2024 · Synced Sep 21, 2026, 8:07 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 21, 2026, 8:07 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 21, 2026, 8:07 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 21, 2026, 8:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Quercetin's Effect on Bone Health and Inflammatory Markers

NCT05371340
View directory record Official record
Conditions
Osteoporosis, Postmenopausal
Interventions
Quercetin (500 mg), Placebo (500 mg)
Dietary Supplement · Other
Lead sponsor
Kennesaw State University
Other
Eligibility
45 Years to 75 Years · Female only
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Kennesaw, Georgia
Source: ClinicalTrials.gov public record
Updated May 11, 2022 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 2 Interventional

Effects of Quercetin on Blood Sugar and Blood Vessel Function in Type 2 Diabetes.

NCT01839344
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Quercetin, Acarbose, placebo
Dietary Supplement · Drug
Lead sponsor
Bastyr University
Other
Eligibility
18 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 17, 2015 · Synced Sep 21, 2026, 8:07 PM EDT
Not yet recruiting Phase 2 Interventional

Palmitic Acid and Human Microvascular Function

NCT06683534
View directory record Official record
Conditions
Microvascular Dysfunction, Microvasculature, Cardiovascular Diseases, Cardiovascular Diseases (CVD), Microvascular Health, Obesity and Overweight
Interventions
Quercetin (dietary supplement), Placebo
Dietary Supplement · Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 40 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Wauwatosa, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 2 Interventional

Investigating the Use of Quercetin on Glucose Absorption in Obesity, and Obesity With Type 2 Diabetes

NCT00065676
View directory record Official record
Conditions
Obesity, Diabetes
Interventions
Quercetin, Placebo
Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2021
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Recruiting Phase 1Phase 2 Interventional

Green Tea and Quercetin in Combination With Docetaxel Chemotherapy in Castration-resistant Prostate Cancer Patients

NCT06615752
View directory record Official record
Conditions
Metastatic Castration-resistant Prostate Cancer (mCRPC)
Interventions
green tea and quercetin + docetaxel, Placebo + docetaxel
Drug
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
18 Years and older · Male only
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 2 Interventional

Improving Physical Ability and Cellular Senescence Elimination in HIV

NCT07144293
View directory record Official record
Conditions
HIV, Frailty, Prefrail, Aging Problems
Interventions
Dasatinib, Quercetin, Placebo - Dasatinib, Placebo - Quercetin
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
50 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
24
States / cities
Los Angeles, California • San Diego, California • San Francisco, California + 18 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Sep 21, 2026, 8:07 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 21, 2026, 8:07 PM EDT
Terminated Not applicable Interventional

Vision Preservation and Restoration Following a 6 Month Trial of GlaucoCetin

NCT04784234
View directory record Official record
Conditions
Primary Open Angle Glaucoma
Interventions
GlaucoCetin, Placebo
Dietary Supplement · Other
Lead sponsor
Wills Eye
Other
Eligibility
40 Years to 80 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 22, 2025 · Synced Sep 21, 2026, 8:07 PM EDT
Recruiting Phase 2Phase 3 Interventional Accepts healthy volunteers

Single Nuclei RNA-seq to Map Adipose Cellular Populations and Senescent Cells in Older Subjects

NCT05653258
View directory record Official record
Conditions
Obesity, Healthy Lifestyle
Interventions
Lifestyle Intervention, Dasatinib 100 MG, Quercetin 1000mg, Placebo, Abdominal adipose tissue biopsy
Other · Drug · Procedure
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 17, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 1 Interventional Results available

Beneficial Effects of Quercetin in Chronic Obstructive Pulmonary Disease (COPD)

NCT01708278
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Quercetin, Placebo - sugar chew
Drug · Other
Lead sponsor
University of Michigan
Other
Eligibility
40 Years to 80 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 25, 2016 · Synced Sep 21, 2026, 8:07 PM EDT
Terminated Phase 2 Interventional Results available

Trial of Quercetin, Bromelain, Rye Flower Pollen & Papain on Reducing Severity of Radiation-Induced Prostatitis

NCT04252625
View directory record Official record
Conditions
Prostate Adenocarcinoma
Interventions
Q-Urol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older · Male only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
2
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 1 Interventional

Efficacy of Provex CV Supplement to Reduce Inflammation Cytokines and Blood Pressure

NCT01106170
View directory record Official record
Conditions
Blood Pressure
Interventions
Provex CV, placebo
Drug · Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 13, 2015 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Randomized Placebo-Controlled Study to Evaluate the Effects of a Gummy and Capsule Supplement on Symptoms of Premenstrual Syndrome

NCT06763809
View directory record Official record
Conditions
PMS, Menstrual Cramp, Mood Change
Interventions
PMS Capsule, Capsule Placebo, PMS Gummy, Gummy Placebo
Dietary Supplement
Lead sponsor
Semaine Health
Industry
Eligibility
18 Years and older · Female only
Enrollment
176 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 21, 2026, 8:07 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Combination Gerotherapeutic Interventions for Healthspan Improvement

NCT07475546
View directory record Official record
Conditions
Healthspan Improvement, Aging, Longevity
Interventions
Rapamycin, Naltrexone, Metformin, NAD+, GSH, Infinite Supplement, Placebo/control, B12, Intervention: Guided Meditation Program, Control: Podcast Listening Activity, Control: Standard Exercise Regimen, Intervention: Structured Exercise Program
Drug · Dietary Supplement · Behavioral
Lead sponsor
AgelessRx
Industry
Eligibility
60 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Evaluation of AppleX™ Apple Extract on Anti-Inflammatory and Healthy Aging Effects

NCT07678346
View directory record Official record
Conditions
Systemic Inflammation (hsCRP), Healthy Aging, Vitality, Healthy Adult Participants
Interventions
Apple Extract, Placebo
Dietary Supplement · Other
Lead sponsor
Nutraland USA, Inc.
Industry
Eligibility
45 Years to 70 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Combined Exercise, Heat, and Quercetin Supplementation on Whole Body Stress Response

NCT01168739
View directory record Official record
Conditions
Heat Acclimation and Thermotolerance
Interventions
Quercetin, Placebo
Dietary Supplement
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 39 Years · Male only
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 1 Interventional

Effect of Quercetin on Green Tea Polyphenol Uptake in Prostate Tissue From Patients With Prostate Cancer Undergoing Surgery

NCT01912820
View directory record Official record
Conditions
Adenocarcinoma of the Prostate, Recurrent Prostate Cancer, Stage I Prostate Cancer, Stage IIA Prostate Cancer, Stage IIB Prostate Cancer, Stage III Prostate Cancer, Stage IV Prostate Cancer
Interventions
green tea extract, quercetin, placebo, therapeutic conventional surgery, laboratory biomarker analysis
Dietary Supplement · Drug · Other + 1 more
Lead sponsor
Jonsson Comprehensive Cancer Center
Other
Eligibility
40 Years to 75 Years · Male only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 22, 2021 · Synced Sep 21, 2026, 8:07 PM EDT
Not listed Phase 2 Interventional

Biological Effects of Quercetin in COPD Phase II

NCT06003270
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Emphysema, Chronic Bronchitis With Airway Obstruction
Interventions
Quercetin 1000 mg, Quercetin 500 MG, Placebo
Drug
Lead sponsor
Temple University
Other
Eligibility
40 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 7, 2024 · Synced Sep 21, 2026, 8:07 PM EDT
Completed Phase 1 Interventional

Lipoic Acid as a Treatment for Acute Optic Neuritis

NCT01294176
View directory record Official record
Conditions
Optic Neuritis
Interventions
Lipoic Acid
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 25, 2019 · Synced Sep 21, 2026, 8:07 PM EDT
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 Sep 16, 2026 · Synced Sep 21, 2026, 8:07 PM EDT