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Showing 1–24 of 1,225 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo supplement Clear all
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Effects of the Libido Lift Supplement on Libido and Sexual Desire in Men

NCT07564791
View directory record Official record
Conditions
Low Libido, Sexual; Desire Absent
Interventions
Dietary Supplement: Libido Lift, Placebo
Dietary Supplement
Lead sponsor
Bio Nature Health
Industry
Eligibility
35 Years to 75 Years · Male only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional

A Study Evaluating the Hair Regrowth Efficacy and Safety of ALRV5XR in Male Subjects With Hair Loss

NCT04450589
View directory record Official record
Conditions
Androgenetic Alopecia, Androgenic Alopecia, Telogen Effluvium, Thinning Hair, Hair Loss/Baldness, Hair Thinning
Interventions
ALRV5XR, ALRV5XR Shampoo, ALRV5XR Conditioner, ALRV5XR Hair Follicle Serum (Nutriment), Placebo, Placebo Shampoo, Placebo Conditioner, Placebo Hair Follicle Serum (Nutriment)
Dietary Supplement · Other
Lead sponsor
Arbor Life Labs
Industry
Eligibility
18 Years to 65 Years · Male only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Sep 2, 2026, 1:34 AM EDT
Terminated Phase 2 Interventional Results available

Randomized Proof-of-Concept Trial to Evaluate the Safety and Explore the Effectiveness of Resveratrol, a Plant Polyphenol, for COVID-19

NCT04400890
View directory record Official record
Conditions
COVID-19
Interventions
Resveratrol, Vitamin D3
Drug · Dietary Supplement
Lead sponsor
Marvin McCreary, MD
Other
Eligibility
45 Years and older
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 23, 2023 · Synced Sep 2, 2026, 1:34 AM EDT
Terminated Phase 2 Interventional Results available

Trial of Oral Glutamine in Patients With Sickle Cell Anemia

NCT00131508
View directory record Official record
Conditions
Anemia, Sickle Cell
Interventions
Glutamine, Placebo
Drug
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
5 Years to 18 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Sep 2, 2026, 1:34 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effects of Resveratrol Supplementation on Measurements of Health and Human Performance

NCT01244360
View directory record Official record
Conditions
Inflammation
Interventions
resveratrol, Placebo Comparator: Sugar Pill
Dietary Supplement · Other
Lead sponsor
Marywood University
Other
Eligibility
45 Years to 75 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Scranton, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 1, 2011 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Vitality Dietary Supplement on Physical and Mental Function in Middle-aged Adults

NCT01155076
View directory record Official record
Conditions
Health-related Quality of Life
Interventions
Vitality Product, Placebo
Dietary Supplement
Lead sponsor
Pharmanex
Industry
Eligibility
40 Years to 70 Years
Enrollment
116 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
3
States / cities
Tucson, Arizona • Chaska, Minnesota • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 13, 2013 · Synced Sep 2, 2026, 1:34 AM EDT
Not yet recruiting Phase 1Phase 2 Interventional

A Clinical Trial of Iron Supplementation for Youth With ADHD and Restless Sleep

NCT07061470
View directory record Official record
Conditions
ADHD, Sleep Problems
Interventions
Ferrous Sulfate, Placebo
Dietary Supplement · Other
Lead sponsor
Hugo W. Moser Research Institute at Kennedy Krieger, Inc.
Other
Eligibility
8 Years to 18 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

The Effects of a Novel Probiotic Supplement on Menopausal Symptoms and Bone Health

NCT04001088
View directory record Official record
Conditions
Menopause
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Lallemand Health Solutions
Industry
Eligibility
40 Years to 59 Years · Female only
Enrollment
144 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
5
States / cities
Lake Worth, Florida • Port Saint Lucie, Florida • Atlanta, Georgia + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Sep 2, 2026, 1:34 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Effect of Protocatechuic Acid on Biochemical Markers of Immunity Status in Healthy Adults

NCT06121362
View directory record Official record
Conditions
Immunity
Interventions
Protocatechuic Acid or PCA, Placebo
Dietary Supplement
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
50 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 28, 2024 · Synced Sep 2, 2026, 1:34 AM EDT
Active, not recruiting Not applicable Interventional

Myo-Inositol for Infertility in PCOS

NCT04407754
View directory record Official record
Conditions
Polycystic Ovary Syndrome
Interventions
Inositol supplement, Placebo supplement
Dietary Supplement
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 36 Years
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effects of a Carotenoid Intervention on Cognitive Function

NCT02023645
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
active supplement, placebo
Dietary Supplement · Other
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 95 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Microbiome and Resilience to Sleep and Circadian Disruption

NCT03747367
View directory record Official record
Conditions
Sleep Deprivation, Circadian Dysregulation, Stress
Interventions
Insufficient Sleep, Prebiotic, Placebo
Behavioral · Dietary Supplement
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
18 Years to 45 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional

A Study Evaluating the Hair Regrowth Efficacy and Safety of ALRV5XR in Female Subjects With Hair Loss

NCT04450602
View directory record Official record
Conditions
Androgenetic Alopecia, Androgenic Alopecia, Telogen Effluvium, Thinning Hair, Hair Loss/Baldness, Hair Thinning
Interventions
ALRV5XR, ALRV5XR Shampoo, ALRV5XR Conditioner, ALRV5XR Hair Follicle Serum (Nutriment), Placebo, Placebo Shampoo, Placebo Conditioner, Placebo Hair Follicle Serum (Nutriment)
Dietary Supplement · Other
Lead sponsor
Arbor Life Labs
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oral Supplement and Acute Resistance Exercise

NCT06801951
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
acute resistance exercise with oral nutrition supplementation, stable tracer infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years to 100 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Treatment Strategy to Enhance Nrf2 Signaling in Older Adults

NCT04848792
View directory record Official record
Conditions
Aging Problems
Interventions
Sulforaphane, Placebo capsules
Dietary Supplement
Lead sponsor
Northern Arizona University
Other
Eligibility
60 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Flagstaff, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 27, 2025 · Synced Sep 2, 2026, 1:34 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effects of a Longevity Supplement on Aging and Photoaging

NCT05262036
View directory record Official record
Conditions
Photoaging
Interventions
Anti-aging Supplement, Placebo
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
35 Years to 70 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Oct 22, 2023 · Synced Sep 2, 2026, 1:34 AM EDT
Recruiting Not applicable Interventional

A Randomized, Triple-blind, Placebo-controlled Study to Evaluate the Effects of a Supplement on Nutrient Gaps and Gut Health Among Individuals Utilizing GLP-1 RAs

NCT07437911
View directory record Official record
Conditions
Nutrition Intake, Nutrition Status, Gastrointestinal Microbiome, GLP-1
Interventions
AG1 - Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Athletic Greens International
Industry
Eligibility
18 Years to 59 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Results available

Zoledronate in Preventing Skeletal (Bone)-Related Events in Men Who Are Receiving Androgen Deprivation Therapy For Prostate Cancer and Bone Metastases

NCT00079001
View directory record Official record
Conditions
Metastatic Cancer, Prostate Cancer
Interventions
zoledronic acid, placebo, androgen deprivation therapy, GnRH agonist, Calcium supplement, Vitamin D
Drug · Other · Dietary Supplement
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Male only
Enrollment
645 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2014
U.S. locations
238
States / cities
Mobile, Alabama • Fort Smith, Arkansas • Little Rock, Arkansas + 159 more
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 2, 2026, 1:34 AM EDT
Recruiting Not applicable Interventional

This Study Aims to Evaluate Whether Milamend's Product Could Improve Hormone Balance in Women Who Suffer From Self-reported PCOS Symptoms.

NCT07764328
View directory record Official record
Conditions
Polycystic Ovarian Syndrome (PCOS)
Interventions
A dietary supplement powder for women, Placebo
Dietary Supplement
Lead sponsor
Mila Mend Inc.
Industry
Eligibility
18 Years to 40 Years · Female only
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional

Effect of Gum Arabic on Gastrointestinal Transit and Permeability

NCT03742076
View directory record Official record
Conditions
Diverticulitis
Interventions
High-dose prebiotic, Low-dose prebiotic, Placebo
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 9, 2023 · Synced Sep 2, 2026, 1:34 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Evaluating the Ability of a Multi-Strain Postbiotic to Impact Inflammation, Immune Components, Gastrointestinal Symptoms, Recovery, Anxiety, and Intestinal Permeability

NCT07387991
View directory record Official record
Conditions
Inflammation, Gastrointestinal Symptoms
Interventions
Multi-Strain Postbiotic, Placebo
Dietary Supplement
Lead sponsor
Lindenwood University
Other
Eligibility
18 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Muscadine Grape Seed Supplementation and Vascular Function

NCT01011517
View directory record Official record
Conditions
Dietary Supplements
Interventions
Muscadine grape seed supplement
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 8, 2018 · Synced Sep 2, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Quasi Experiment of Prenatal Probiotics Against Group B Streptococcus Colonization

NCT02249325
View directory record Official record
Conditions
Pregnancy
Interventions
Probiotic dietary supplement
Dietary Supplement
Lead sponsor
Marquette University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 6, 2014 · Synced Sep 2, 2026, 1:34 AM EDT
Withdrawn Phase 2 Interventional

iNOPulse for COVID-19

NCT04398290
View directory record Official record
Conditions
COVID-19, Hypoxemia, Hypoxemic Respiratory Failure
Interventions
Inhaled nitric oxide (iNO), Nitrogen gas, Oxygen gas
Drug
Lead sponsor
Roger Alvarez
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Sep 2, 2026, 1:34 AM EDT