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ClinicalTrials.gov public records Last synced Oct 6, 2026, 11:24 PM EDT

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Showing 25–48 of 68 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Extract of Green and Black Tea Clear all
Completed No phase listed Observational

Monitoring of Early Disease Progression in Hereditary Transthyretin Amyloidosis

NCT03431896
View directory record Official record
Conditions
Amyloidosis, Amyloid, Amyloid Neuropathies, Familial, Amyloid Cardiomyopathy, Amyloid - Primary, Transthyretin Amyloidosis, AL Amyloidosis
Interventions
Not listed
Lead sponsor
The Cleveland Clinic
Other
Eligibility
Not listed
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional

Diabetes Visual Function Supplement Study

NCT01646047
View directory record Official record
Conditions
Diabetes Mellitus - Type 1, Diabetes Mellitus - Type 2, Non-proliferative Diabetic Retinopathy
Interventions
multi-component nutritional supplement capsules, multi-component dietary supplement
Dietary Supplement
Lead sponsor
ZeaVision, LLC
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jan 22, 2015 · Synced Oct 6, 2026, 11:24 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Flavonoids on Gut Permeability in Cyclists

NCT03427879
View directory record Official record
Conditions
Gut Permeability, Gut Inflammation
Interventions
Low flavonoid beverage, High flavonoid beverage
Drug
Lead sponsor
Utah State University
Other
Eligibility
18 Years to 49 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Logan, Utah
Source: ClinicalTrials.gov public record
Updated Feb 25, 2021 · Synced Oct 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Protandim Supplementation on Oxidative Damage and Athletic Performance

NCT02172625
View directory record Official record
Conditions
Oxidative Stress
Interventions
Protandim Dietary Supplement, Placebo Group
Dietary Supplement · Other
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 55 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 12, 2019 · Synced Oct 6, 2026, 11:24 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 6, 2026, 11:24 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 23, 2025 · Synced Oct 6, 2026, 11:24 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 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Polyphenols, Exercise, and Metabolomics

NCT01775384
View directory record Official record
Conditions
Exercise-induced Inflammation, Exercise-induced Oxidative Stress, Exercise-induced Immune Dysfunction
Interventions
Nutrasorb, Placebo
Dietary Supplement
Lead sponsor
Appalachian State University
Other
Eligibility
18 Years to 55 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 25, 2013 · Synced Oct 6, 2026, 11:24 PM 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 4, 2014 · Synced Oct 6, 2026, 11:24 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 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Gut-level Antiinflammatory Activities of Green Tea in Metabolic Syndrome

NCT03973996
View directory record Official record
Conditions
Dysbiosis, Endotoxemia, Metabolic Syndrome, Inflammation
Interventions
Green Tea Extract, Placebo
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 19, 2025 · Synced Oct 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Glucagon Like Peptide 1 (GLP-1) Booster™ RCT Study

NCT07141472
View directory record Official record
Conditions
Blood Sugar; High, Overweight and Obesity, Fat Loss, GLP-1, Glucagon
Interventions
GB, Placebo
Dietary Supplement
Lead sponsor
Lawry Han
Industry
Eligibility
18 Years to 65 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 3, 2025 · Synced Oct 6, 2026, 11:24 PM EDT
Terminated Phase 2 Interventional

Green Tea Extract in Treating Patients With Actinic Keratosis

NCT00005097
View directory record Official record
Conditions
Non-melanomatous Skin Cancer
Interventions
Polyphenon E and Placebo
Drug
Lead sponsor
Frank Meyskens
Other
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2018 · Synced Oct 6, 2026, 11:24 PM EDT
Terminated Phase 2 Interventional Results available

Safety and Neuroprotective Effects of Polyphenon E in MS; Phase II

NCT01451723
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Polyphenon E, Placebo
Drug · Other
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
18 Years to 60 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 14, 2014 · Synced Oct 6, 2026, 11:24 PM EDT
Terminated Phase 2 Interventional Results available

Green Tea Extract in Treating Patients With Low-Risk Prostate Cancer

NCT01928485
View directory record Official record
Conditions
Stage I Prostate Cancer, Stage IIA Prostate Cancer, Stage IIB Prostate Cancer
Interventions
active surveillance, Sunphenon, laboratory biomarker analysis, Questionnaire Administration
Other · Drug
Lead sponsor
Sanjay Gupta PhD
Other
Eligibility
45 Years to 85 Years · Male only
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 22, 2020 · Synced Oct 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of a Dietary Supplement on Quality of Life

NCT05323084
View directory record Official record
Conditions
Quality of Life
Interventions
Dietary supplement
Dietary Supplement
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
50 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 16, 2024 · Synced Oct 6, 2026, 11:24 PM EDT
Terminated Phase 2 Interventional

Defined Green Tea Catechin Extract in Treating Patients With Localized Prostate Cancer Undergoing Surgery

NCT01340599
View directory record Official record
Conditions
Stage I Prostate Cancer, Stage IIA Prostate Cancer, Stage IIB Prostate Cancer
Interventions
defined green tea catechin extract, placebo, immunohistochemistry staining method, immunoenzyme technique, questionnaire administration, therapeutic conventional surgery, high performance liquid chromatography, mass spectrometry
Dietary Supplement · Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
45 Years to 75 Years · Male only
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 15, 2012 · Synced Oct 6, 2026, 11:24 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 6, 2026, 11:24 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Green Tea Extract in Treating Patients With Stage 0, Stage I, or Stage II Chronic Lymphocytic Leukemia

NCT00262743
View directory record Official record
Conditions
Leukemia
Interventions
Polyphenon E
Biological
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
2
States / cities
Scottsdale, Arizona • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 30, 2013 · Synced Oct 6, 2026, 11:24 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 6, 2026, 11:24 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 6, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Beet Supplementation, Exercise, Inflammation

NCT05907135
View directory record Official record
Conditions
Inflammatory Response, Metabolic Disturbance, Immune Suppression
Interventions
Beet, Placebo
Dietary Supplement
Lead sponsor
Appalachian State University
Other
Eligibility
18 Years to 60 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 20, 2023 · Synced Oct 6, 2026, 11:24 PM EDT
Not listed Phase 1 Interventional

Defined Green Tea Catechin Extract in Preventing Liver Cancer in Participants With Cirrhosis

NCT03278925
View directory record Official record
Conditions
Cirrhosis
Interventions
Biopsy, Biospecimen Collection, Computed Tomography, Defined Green Tea Catechin Extract, Laboratory Biomarker Analysis, Magnetic Resonance Imaging, Pharmacological Study, Questionnaire Administration, Ultrasound
Procedure · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 2, 2024 · Synced Oct 6, 2026, 11:24 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 18, 2017 · Synced Oct 6, 2026, 11:24 PM EDT