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Showing 1–24 of 46 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 2 Interventional Results available

Green Tea Extract in Treating Patients With Nonmetastatic Bladder Cancer

NCT00666562
View directory record Official record
Conditions
Stage I Bladder Cancer, Stage II Bladder Cancer, Stage III Bladder Cancer
Interventions
Defined Green Tea Catechin Extract, Laboratory Biomarker Analysis, Pharmacological Study, Placebo, Therapeutic Conventional Surgery
Dietary Supplement · Other · Drug + 1 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2017
U.S. locations
6
States / cities
Birmingham, Alabama • Burlington, Massachusetts • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 16, 2017 · Synced Sep 6, 2026, 7:37 AM EDT
Terminated Phase 2 Interventional Results available

Green Tea Extract in Treating Patients With Monoclonal Gammopathy of Undetermined Significance and/or Smoldering Multiple Myeloma

NCT00942422
View directory record Official record
Conditions
Multiple Myeloma and Plasma Cell Neoplasm, Precancerous Condition
Interventions
defined green tea catechin extract, gene expression analysis, protein analysis, laboratory biomarker analysis
Dietary Supplement · Genetic · Other
Lead sponsor
Barbara Ann Karmanos Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 26, 2015 · Synced Sep 6, 2026, 7:37 AM EDT
Not listed Not applicable Interventional

Prospective Study of Adjunctive Carotenoids Plus Anti-oxidants in Anti-VEGF Treated Diabetic Macular Edema

NCT03866005
View directory record Official record
Conditions
Center-involved Diabetic Macular Edema (CI-DME)
Interventions
Diabetes Visual Function Study (DiVFuSS) softgels, canola oil placebo softgels, 2 per day
Dietary Supplement · Other
Lead sponsor
ZeaVision, LLC
Industry
Eligibility
18 Years to 80 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
2
States / cities
Olympia, Washington • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jul 1, 2020 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Chamomile Intake on Blood Coagulation Tests in Healthy Volunteers

NCT05006378
View directory record Official record
Conditions
Coagulation Disorder
Interventions
Chamomile Tea, Chamomile Extract Capsule, Placebo Capsule
Dietary Supplement
Lead sponsor
Stony Brook University
Other
Eligibility
18 Years to 75 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Feb 9, 2022 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional

Green Tea in Breast Cancer Patients

NCT00949923
View directory record Official record
Conditions
Incident Breast Cancer
Interventions
tea capsule
Dietary Supplement
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older · Female only
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Effects of Naturally Occurring Tea and Coffee-based Ingredients on Cognitive Performance

NCT06062186
View directory record Official record
Conditions
Cognitive Change
Interventions
Placebo, AmaTea Guayusa Extract, Lion's Mane
Dietary Supplement
Lead sponsor
The Center for Applied Health Sciences, LLC
Industry
Eligibility
18 Years to 50 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Canfield, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 1, 2023 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Phase 2 Interventional

ROAR-DIGAP: A Widely Inclusive, Largely Virtual Pilot Trial Utilizing DIGAP (Deep Integrated Genomics Analysis Platform) To Personalize Treatments

NCT06429059
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis ALS
Interventions
Astaxanthin, Protandim, Melatonin, MitoQ
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
2
States / cities
Durham, North Carolina • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Sep 6, 2026, 7:37 AM EDT
Terminated Phase 2 Interventional Results available

Zinc and Green Tea Extract for Community Respiratory Viral Infections

NCT04898023
View directory record Official record
Conditions
Respiratory Viral Infection
Interventions
zinc-green tea extract-ascorbic acid, Placebo
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Sep 6, 2026, 7:37 AM 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 6, 2026, 7:37 AM EDT
Not yet recruiting Not applicable Interventional

Percepta for Cognitive Optimization

NCT07612449
View directory record Official record
Conditions
Mild Cognitive Impairment (MCI), Memory
Interventions
Percepta, Placebo
Dietary Supplement
Lead sponsor
Cerebrum DAO Association
Other
Eligibility
40 Years to 85 Years
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 6, 2026, 7:37 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Protandim and the Metabolic Syndrome

NCT01125501
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Protandim
Dietary Supplement
Lead sponsor
SomaLogic, Inc.
Industry
Eligibility
40 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 17, 2017 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Phase 2 Interventional Results available

Green Tea or Polyphenon E in Preventing Lung Cancer in Former Smokers With Chronic Obstructive Pulmonary Disease

NCT00363805
View directory record Official record
Conditions
Lung Cancer Prevention
Interventions
green tea, Polyphenon E, placebo
Dietary Supplement · Drug · Other
Lead sponsor
Sherry Chow
Other
Eligibility
40 Years to 80 Years
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
3
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 27, 2013 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Nutritional Supplement Capsule Containing Curcumin, Green Tea Extract, Polygonum Cuspidatum Extract, and Soybean Extract in Healthy Participants

NCT00768118
View directory record Official record
Conditions
Healthy, no Evidence of Disease
Interventions
curcumin/green tea extract/Polygonum cuspidatum extract/soybean extract capsule, electrophoretic mobility shift assay, laboratory biomarker analysis
Dietary Supplement · Genetic · Other
Lead sponsor
Barbara Ann Karmanos Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 22, 2014 · Synced Sep 6, 2026, 7:37 AM EDT
Terminated Phase 2 Interventional

Green Tea Extract: a Non-Surgical Alternative for Treatment of Uterine Fibroids

NCT01311869
View directory record Official record
Conditions
Leiomyoma
Interventions
EGCG ( Green Tea extract), Brown rice pills
Dietary Supplement
Lead sponsor
Meharry Medical College
Other
Eligibility
18 Years and older · Female only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 23, 2013 · Synced Sep 6, 2026, 7:37 AM EDT
Withdrawn Phase 2 Interventional

Safety and Brain Protection Effects of the Green Tea Extract Theaphenon 95% (95% Pure EGCG) in Multiple Sclerosis

NCT02011451
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
95% Pure ECGC capsules 200mg, Placebo Comparator:
Drug
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Sep 25, 2016 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Absorption, Metabolism and Excretion of Apigenin and Apigenin Glycosides

NCT03526081
View directory record Official record
Conditions
Healthy
Interventions
Chamomile Tea, Parsley based drink, Parsley Yogurt, Apigenin, Parsley-based drink (II)
Other
Lead sponsor
University of California, Davis
Other
Eligibility
25 Years to 60 Years · Male only
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
2
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 22, 2019 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Assessing the Pharmacokinetics and Drug Interaction Liability of Kratom, an Opioid-like Natural Product

NCT04392011
View directory record Official record
Conditions
Interaction Drug Food
Interventions
Midazolam HCl, Dextromethorphan HBr, Kratom
Drug · Dietary Supplement
Lead sponsor
Washington State University
Other
Eligibility
18 Years to 55 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated Dec 19, 2023 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Acute Effects of Chamomile Intake on Blood Coagulation Tests in Healthy Volunteers

NCT05272475
View directory record Official record
Conditions
Coagulation Disorder
Interventions
Chamomile Tea, Chamomile Extract Capsule
Dietary Supplement
Lead sponsor
Stony Brook University
Other
Eligibility
18 Years to 75 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Jun 9, 2022 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Phase 2 Interventional Results available

Pilot Study of Green Tea Extract (Polyphenon E®)in Ulcerative Colitis

NCT00718094
View directory record Official record
Conditions
Mild to Moderately Active Ulcerative Colitis
Interventions
Polyphenon E®, Placebo Oral Tablet
Drug
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 85 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Dec 13, 2017 · Synced Sep 6, 2026, 7:37 AM EDT
Recruiting Phase 2 Interventional

EGCG for Hepatocellular Carcinoma Chemoprevention

NCT06015022
View directory record Official record
Conditions
Cirrhosis, Liver
Interventions
Epigallocatechin gallate (EGCG), Placebo
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 4, 2025 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Over-the-counter Dietary Supplements on Kidney Stone Risk

NCT02404701
View directory record Official record
Conditions
Hyperoxaluria
Interventions
Aloe vera with cactus, Cranberry, Green tea extract, Bilberry, Cinnamon, Milk thistle, Turmeric, Aloe vera
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Phase 1 Interventional Results available

Study to Evaluate Safety and Toxicity of Polyphenon E (EGCG) in HIV-1-Infected Individuals

NCT01433289
View directory record Official record
Conditions
HIV Infection
Interventions
Polyphenon E, Placebo
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
2
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 18, 2023 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Pharmacokinetics and Hepatic Safety of EGCG

NCT04177693
View directory record Official record
Conditions
Uterine Fibroids
Interventions
Epigallocatechin gallate (EGCG), Clomiphene Citrate, Letrozole
Dietary Supplement · Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 4, 2023 · Synced Sep 6, 2026, 7:37 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Nutraceutical Effects on Long-Term Memory

NCT01963767
View directory record Official record
Conditions
Aging
Interventions
NT-020, Placebo
Drug · Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
65 Years to 85 Years
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 3, 2014 · Synced Sep 6, 2026, 7:37 AM EDT