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ClinicalTrials.gov public records Last synced Oct 22, 2026, 7:23 PM EDT

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Showing 1–24 of 88 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: green tea extract Clear all
Completed Phase 1 Interventional Results available

Safety of Polyphenon E in Multiple Sclerosis Pilot Study

NCT00836719
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Polyphenon E
Drug
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Jun 27, 2013 · Synced Oct 22, 2026, 7:23 PM 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 23, 2019 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Fish Oil and Green Tea Extract in Preventing Prostate Cancer in Patients Who Are at Risk for Developing Prostate Cancer

NCT00253643
View directory record Official record
Conditions
Precancerous Condition, Prostate Cancer
Interventions
green tea catechin extract, fish oil, placebo
Dietary Supplement · Other
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
21 Years to 120 Years · Male only
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2013
U.S. locations
3
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 18, 2017 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Green Tea and Reduction of Breast Cancer Risk

NCT00917735
View directory record Official record
Conditions
Breast Cancer
Interventions
Green tea extract supplement, Placebo
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
1,075 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2014
U.S. locations
5
States / cities
Edina, Minnesota • Maple Grove, Minnesota • Minneapolis, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 22, 2016 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Results available

Treatment of External Genital Warts With Cryotherapy and Sinecatechins 15% Ointment

NCT02147353
View directory record Official record
Conditions
External Genital Warts
Interventions
Sinecatechins 15% Ointment, Cryotherapy alone
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 14, 2019 · Synced Oct 22, 2026, 7:23 PM 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 26, 2016 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating Whole Foods Supplementation on Cognition

NCT01672359
View directory record Official record
Conditions
Sub-optimal Cognitive Function, Sub-optimal Immune Function
Interventions
Ginkgo Synergy® and Choline, OPC Synergy® and Catalyn, Placebo
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
60 Years and older
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 6, 2014 · Synced Oct 22, 2026, 7:23 PM EDT
Active, not recruiting Phase 3 Interventional

FRIEND: Fibroids and Unexplained Infertility Treatment With Epigallocatechin Gallate; A Natural CompounD in Green Tea

NCT05364008
View directory record Official record
Conditions
Leiomyoma, Uterine
Interventions
Green Tea Extract, Placebo
Drug · Other
Lead sponsor
Yale University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
4
States / cities
New Haven, Connecticut • Chicago, Illinois • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Studying Glucose and Appetite Response With Alternatives to Soda Pop

NCT06427915
View directory record Official record
Conditions
Healthy Nutrition
Interventions
OLIPOP prebiotic soda, Traditional sugar-sweetened cola
Other
Lead sponsor
Olipop, PBC
Industry
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 15, 2025 · Synced Oct 22, 2026, 7:23 PM 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 10, 2022 · Synced Oct 22, 2026, 7:23 PM 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 2, 2023 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Green Tea Lozenges for the Management of Dry Mouth

NCT01647737
View directory record Official record
Conditions
Xerostomia, Sjogren Syndrome, Dry Mouth
Interventions
MighTeaFlow, Xylitol
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 18, 2015 · Synced Oct 22, 2026, 7:23 PM EDT
Terminated Phase 2 Interventional Results available

Polyphenon E in Treating Patients With High-Risk of Colorectal Cancer

NCT01606124
View directory record Official record
Conditions
Advanced Colorectal Adenomas, Adenocarcinoma of the Colon, Stage I Colon Cancer, Stage II Colon Cancer, Stage III Colon Cancer
Interventions
defined green tea catechin extract, placebo, questionnaire administration, laboratory biomarker analysis
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
40 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
3
States / cities
Chicago, Illinois • Hines, Illinois • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 27, 2017 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Effects of Fitness Drink Formulas on Energy Expenditure and Fat Metabolism

NCT04455009
View directory record Official record
Conditions
Caffeine, Diet, Healthy, Fat Burn, Cognitive Change, Fatigue
Interventions
Fitness Drink Formula
Dietary Supplement
Lead sponsor
University of Central Florida
Other
Eligibility
18 Years to 35 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jul 2, 2020 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Phase 1 Interventional

Defined Green Tea Catechins in Treating Patients With Prostate Cancer Undergoing Surgery to Remove the Prostate

NCT00459407
View directory record Official record
Conditions
Adenocarcinoma of the Prostate, Stage I Prostate Cancer, Stage II Prostate Cancer
Interventions
defined green tea catechin extract, placebo, immunohistochemistry staining method, immunoenzyme technique, laboratory biomarker analysis, biopsy, mass spectrometry, high performance liquid chromatography
Dietary Supplement · Drug · Other + 1 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 8, 2014 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Phase 2 Interventional

Herbal Therapy for Treatment of Recurrent Prostate Cancer

NCT00669656
View directory record Official record
Conditions
Prostate Cancer
Interventions
Prostate Health Cocktail
Drug
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older · Male only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 20, 2017 · Synced Oct 22, 2026, 7:23 PM 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 27, 2016 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

RiteStart Personal Nutritional Dietary Study

NCT05130905
View directory record Official record
Conditions
Healthy Nutrition
Interventions
RiteStart Supplement
Dietary Supplement
Lead sponsor
4Life Research, LLC
Industry
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Sandy City, Utah
Source: ClinicalTrials.gov public record
Updated Nov 23, 2021 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Phase 2 Interventional Results available

Green Tea Extract in Preventing Cervical Cancer in Patients With Human Papillomavirus and Low-Grade Cervical Intraepithelial Neoplasia

NCT00303823
View directory record Official record
Conditions
Cervical Cancer, Cervical Intraepithelial Neoplasia Grade 1, Human Papilloma Virus Infection
Interventions
placebo, defined green tea catechin extract, laboratory biomarker analysis
Drug · Dietary Supplement · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated May 5, 2015 · Synced Oct 22, 2026, 7:23 PM 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 19, 2023 · Synced Oct 22, 2026, 7:23 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 23, 2021 · Synced Oct 22, 2026, 7:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Satiety and Alcohol Challenge

NCT06576674
View directory record Official record
Conditions
Alcohol Drinking
Interventions
Dietary Fiber + Green Tea Extract, Alcohol, Aspartame Placebo Supplement
Dietary Supplement · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years to 45 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 5, 2025 · Synced Oct 22, 2026, 7:23 PM EDT
Not yet recruiting Phase 1 Interventional

Daily, Encapsulated, Green Tea Extract to Mitigate Neuropathic Pain in Patients With Established Cancer-Associated Neuropathic Pain

NCT07682324
View directory record Official record
Conditions
Neuropathic Pain, Cancer Treatment
Interventions
Green Tea Leaf Extract Decaffeinated, Placebo Control
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 22, 2026, 7:23 PM EDT
Not listed Not applicable Interventional

Diabetic Retinopathy Functional Evaluation Study: Monitoring Carotenoid Vitamins Treatment Using ERG

NCT04117022
View directory record Official record
Conditions
Diabetes, Diabetic Retinopathy
Interventions
DVS supplementation
Dietary Supplement
Lead sponsor
ZeaVision, LLC
Industry
Eligibility
21 Years to 80 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
2
States / cities
Pomona, California • Tahlequah, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 23, 2021 · Synced Oct 22, 2026, 7:23 PM EDT