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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo extract Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Ashwagandha Extract on Stress Levels

NCT06793891
View directory record Official record
Conditions
Stress
Interventions
ashwagandha root, ashwagandha root and leaf, placebo
Dietary Supplement · Other
Lead sponsor
Nutraceuticals Research Institute
Other
Eligibility
30 Years to 59 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Huntsville, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 26, 2025 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Randomized Placebo Controlled Clinical Study of an Oral Product in Subjects With Menopausal Symptoms

NCT06787443
View directory record Official record
Conditions
Menopausal Symptoms
Interventions
Placebo, Dietary Supplement with Proprietary Herbal Extract Blend and GABA
Dietary Supplement
Lead sponsor
Olly, PBC
Industry
Eligibility
40 Years to 65 Years · Female only
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 21, 2025 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Assess the Synergistic Effects of a Cranberry Beverage on Cognitive Function

NCT05008549
View directory record Official record
Conditions
Attention, Mood
Interventions
Cranberry Juice Product
Dietary Supplement
Lead sponsor
Ocean Spray Cranberries, Inc.
Industry
Eligibility
18 Years to 45 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 6, 2023 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Phase 3 Interventional

Combination Chemotherapy Plus Radiation Therapy With or Without AE-941 in Treating Patients With Stage III Non-small Cell Lung Cancer That Cannot Be Removed By Surgery

NCT00005838
View directory record Official record
Conditions
Adenocarcinoma of the Lung, Adenosquamous Cell Lung Cancer, Large Cell Lung Cancer, Squamous Cell Lung Cancer, Stage IIIA Non-small Cell Lung Cancer, Stage IIIB Non-small Cell Lung Cancer
Interventions
shark cartilage extract AE-941, placebo, cisplatin, vinorelbine tartrate, carboplatin, paclitaxel, radiation therapy
Drug · Other · Radiation
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
756 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2013 · Synced Sep 22, 2026, 9:29 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Decentralized Study to Evaluate a Dietary Supplement for Episodes of Mild Acute Stress in Healthy People

NCT07511088
View directory record Official record
Conditions
Situational Anxiety
Interventions
Botanical extract for anxiety, Placebo capsule
Dietary Supplement
Lead sponsor
PLT Health Solutions
Industry
Eligibility
18 Years to 60 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Ginger in Treating Nausea in Patients Receiving Chemotherapy for Cancer

NCT00040742
View directory record Official record
Conditions
Nausea, Vomiting
Interventions
ginger, placebo
Dietary Supplement · Other
Lead sponsor
Gary Morrow
Other
Eligibility
18 Years to 120 Years
Enrollment
745 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2011
U.S. locations
19
States / cities
Mobile, Alabama • Honolulu, Hawaii • Chicago, Illinois + 16 more
Source: ClinicalTrials.gov public record
Updated Nov 8, 2015 · Synced Sep 22, 2026, 9:29 AM 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 24, 2021 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Blueberry Enhances Activity and Cognition Through Increased Vascular Efficiency

NCT04049162
View directory record Official record
Conditions
Sedentary Lifestyle, Blood Pressure, Arterial Stiffness, Overweight and Obesity
Interventions
Blueberry Plus Exercise (BB-EX), Blueberry Placebo Plus Exercise (P-EX)
Dietary Supplement
Lead sponsor
Duke University
Other
Eligibility
60 Years and older
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 19, 2023 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Effects of Sulforaphane on Normal Prostate Tissue

NCT00946309
View directory record Official record
Conditions
Prostate Cancer
Interventions
High Sulforaphane Extract (Broccoli Sprout Extract), Microcrystalline Cellulose NF (placebo)
Drug
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
40 Years to 75 Years · Male only
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 14, 2016 · Synced Sep 22, 2026, 9:29 AM 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 14, 2012 · Synced Sep 22, 2026, 9:29 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Blackcurrants Modify Gut Microbiota and Reduce Osteoporosis Risk in Postmenopausal Females

NCT07365514
View directory record Official record
Conditions
Postmenopausal Osteoporosis, Gut Microbiome, Menopause
Interventions
Blackcurrant (BC) extract, Placebo
Drug
Lead sponsor
University of Connecticut
Other
Eligibility
45 Years to 70 Years · Female only
Enrollment
159 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 22, 2026, 9:29 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 22, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

Effects of Muscadine Grape Extract in Men With Prostate Cancer on Androgen Deprivation Therapy

NCT03496805
View directory record Official record
Conditions
Recurrent Prostate Cancer
Interventions
MGE, Placebo, ADT
Drug · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Male only
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
2
States / cities
Salisbury, North Carolina • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced Sep 22, 2026, 9:29 AM EDT
Terminated Phase 3 Interventional Results available

A Phase III Trial of HMPL-004 in Patients With Mild to Moderate Active Ulcerative Colitis

NCT01805791
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
HMPL-004 1800 mg/day, Placebo, HMPL-004 2400 mg/day
Drug
Lead sponsor
Hutchison Medipharma Limited
Industry
Eligibility
18 Years to 75 Years
Enrollment
201 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Agawam, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 1, 2020 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Ashwagandha Extract (Capsule KSM-66 300 mg) on Sexual Health in Healthy Women

NCT05831241
View directory record Official record
Conditions
Sexual Health
Interventions
Ashwagandha, Placebo
Dietary Supplement · Other
Lead sponsor
SF Research Institute, Inc.
Network
Eligibility
18 Years to 55 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Cinnamon Extract on Insulin Resistance Parameters in Polycystic Ovary Syndrome: A Pilot Study

NCT00331279
View directory record Official record
Conditions
Polycystic Ovary Syndrome
Interventions
Oral Cinnamon Extract, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
23 Years to 47 Years · Female only
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 9, 2012 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Results available

Blueberry Consumption and Type 2 Diabetes

NCT02972996
View directory record Official record
Conditions
Type2 Diabetes
Interventions
Blueberry, Placebo
Other
Lead sponsor
Albany Research Institute, Inc.
Other
Eligibility
45 Years to 75 Years · Male only
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Apr 18, 2022 · Synced Sep 22, 2026, 9:29 AM EDT
Terminated Phase 4 Interventional Results available

Naloxegol to Prevent Lower Gastrointestinal Paralysis in Critically Ill Adults Administered Opioids

NCT02977286
View directory record Official record
Conditions
Constipation
Interventions
Naloxegol Oral Tablet, Placebo Oral Tablet, Docusate Sodium 100 Mg oral capsule [Colace], Senna 217 Mg Oral Tablet, Polyethylene Glycols, Bisacodyl 10 mg Suppository, Magnesium Citrate Oral Liquid Product, Methylnaltrexone
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 15, 2023 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Immulina on Immune Measures

NCT04071730
View directory record Official record
Conditions
Effects of Immulina on Natural Killer Cells
Interventions
Immulina Dietary Supplementation
Dietary Supplement
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
18 Years to 64 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated May 18, 2022 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A 12 Week, 3-Period Study to Evaluate the Effects of a Dietary Supplement on Lipid Metabolism

NCT02366156
View directory record Official record
Conditions
Hyperlipidemia
Interventions
Placebo, Low Dose Grape Blend, High Dose Grape Blend
Dietary Supplement
Lead sponsor
Access Business Group
Industry
Eligibility
18 Years to 70 Years
Enrollment
93 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 11, 2015 · Synced Sep 22, 2026, 9:29 AM EDT
Terminated Early Phase 1 Interventional Results available

Fermented Wheat Germ Extract in Women With Ovarian Cancer

NCT02411565
View directory record Official record
Conditions
Ovarian Cancer
Interventions
Fermented Wheat Germ Extract (FWGE), Placebo, Standard of Care: Planned Surgery, Quality of Life (QoL) Surveys: FACT-O
Drug · Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Pomegranate on Aging and Inflammation of the Skin

NCT02258776
View directory record Official record
Conditions
Skin Photoaging, Inflammation and Skin Pathogenic Bacteria
Interventions
Pomegranate Extract, Pomegranate Juice, Placebo
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
30 Years to 45 Years · Female only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 28, 2017 · Synced Sep 22, 2026, 9:29 AM 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 11, 2019 · Synced Sep 22, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Short-Term Rhodiola Rosea for Anaerobic Performance and Cognitive Function in Resistance-Trained Adults

NCT07225413
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Rhodiola rosea (low dose), Rhodiola rosea (high dose), Placebo capsules
Dietary Supplement
Lead sponsor
Jacksonville State University
Other
Eligibility
18 Weeks to 40 Weeks
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Jacksonville, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Sep 22, 2026, 9:29 AM EDT