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ClinicalTrials.gov public records Last synced Sep 3, 2026, 7:29 AM EDT

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Showing 1–22 of 22 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Gummy Placebo Clear all
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

NCT05387876
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D intervention, Placebo intervention
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 79 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Collagen Vitamin C Dose Response Performance

NCT03293004
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Hydrolyzed collagen, Vitamin C, Optimized Hydrolyzed Collagen and Vitamin C, Gummy Placebo
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 25 Years · Male only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Aug 20, 2018 · Synced Sep 3, 2026, 7:29 AM EDT
Not yet recruiting Not applicable Interventional

Study to Evaluate Xtressé Gummy Supplement in Men With Androgenic Alopecia

NCT07637071
View directory record Official record
Conditions
Androgenic Alopecia, Hair Loss/Baldness, Hair Thinning
Interventions
Xtressé Hair Growth Gummies, Placebo Comparator
Other · Dietary Supplement
Lead sponsor
Restore Biologics Holdings, Inc. dba Xtressé
Industry
Eligibility
18 Years to 65 Years · Male only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
2
States / cities
Maitland, Florida • Port Orange, Florida
Source: ClinicalTrials.gov public record
Updated Aug 16, 2026 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Influenza Virus Vaccine Plus Vitamin A and D Supplements for Prevention of Respiratory Virus Infections in Children

NCT02649192
View directory record Official record
Conditions
Healthy Participants
Interventions
Influenza virus vaccine, Vitamins A and D, Placebo
Biological · Dietary Supplement · Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
2 Years to 8 Years
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 28, 2019 · Synced Sep 3, 2026, 7:29 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Lutein Supplementation in Healthy Children

NCT05314647
View directory record Official record
Conditions
Eye Fatigue, Diet, Healthy, Cognitive Change
Interventions
lutein, placebo
Dietary Supplement
Lead sponsor
Northcentral University
Other
Eligibility
8 Years to 16 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Des Moines, Iowa
Source: ClinicalTrials.gov public record
Updated Nov 29, 2023 · Synced Sep 3, 2026, 7:29 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

The Impact of Product Formulation on the Pharmacokinetics and Pharmacodynamics of Cannabis Edibles

NCT05602649
View directory record Official record
Conditions
Cannabis Use
Interventions
Cannabis, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years to 55 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Double-Blind, Randomized, Placebo-Controlled Study of the Safety and Effects of Various Cannabinoids on Sleep Quality

NCT07769164
View directory record Official record
Conditions
Sleep Disturbance, Sleep Quality
Interventions
2 mg THC + 2 mg CBN + 2 mg CBG + 10 mg CBD + 1 mg Melatonin, 10 mg THC + 5 mg CBN + 5 mg CBG + 20 mg CBD, 10 mg THC + 20 mg CBN + 5 mg CBG, Stay Asleep Placebo, Fast Asleep Placebo
Dietary Supplement
Lead sponsor
Cannabis Science Innovations, LLC
Industry
Eligibility
21 Years to 55 Years
Enrollment
332 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Sarasota, Florida
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 3, 2026, 7:29 AM 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 18, 2025 · Synced Sep 3, 2026, 7:29 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

This Repeated Measures Parallel-group Investigation Will Examine the Influence of Short-term Melatonin Supplementation (5mg, 3 x Day for 72 Hours) on Cellular Responses, Functional Performance and Recovery Following an Acute Bout of Dynamic Resistance Exercise in Resistance Trained Men and Women

NCT06617351
View directory record Official record
Conditions
Cell Migration, Cell Invasion, Exercise Recovery
Interventions
Melatonin, Placebo
Dietary Supplement
Lead sponsor
University of Central Florida
Other
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Sep 30, 2024 · Synced Sep 3, 2026, 7:29 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Clinical Study to Assess the Effects of Prebiotic and Probiotic Supplement

NCT06794619
View directory record Official record
Conditions
Healthy
Interventions
Placebo, Dietary Supplement with actives
Dietary Supplement
Lead sponsor
Olly, PBC
Industry
Eligibility
18 Years to 50 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
St. Petersburg, Florida
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Randomized Placebo-Controlled Study to Evaluate the Effects of a Gummy and Capsule Supplement on Symptoms of Premenstrual Syndrome

NCT06763809
View directory record Official record
Conditions
PMS, Menstrual Cramp, Mood Change
Interventions
PMS Capsule, Capsule Placebo, PMS Gummy, Gummy Placebo
Dietary Supplement
Lead sponsor
Semaine Health
Industry
Eligibility
18 Years and older · Female only
Enrollment
176 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Double-Blind, Randomized, Placebo-Controlled Study of the Safety and Effects of CBN With and Without CBD on Sleep Quality

NCT05839964
View directory record Official record
Conditions
Healthy Adults
Interventions
CBN and CBD
Dietary Supplement
Lead sponsor
Canopy Growth Corporation
Industry
Eligibility
18 Years to 55 Years
Enrollment
301 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Fayetteville, Arkansas
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 3, 2026, 7:29 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

A Direct-to-Consumer Study Investigating the Effect of Specific Cannabinoid Products on Motivation, Energy Level, Focus, and Appetite in Healthy Adults

NCT06213064
View directory record Official record
Conditions
Motivation
Interventions
Study Product, THC Product, Placebo
Behavioral
Lead sponsor
Phylos Bioscience, Inc.
Industry
Eligibility
21 Years to 100 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 18, 2024 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Preventing Health Disparities During Pregnancy Through Vitamin D Supplementation

NCT01932788
View directory record Official record
Conditions
Vitamin D3 Deficiency
Interventions
Vitamin D3 4000 IU in gummy form, Placebo gummy vitamin
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
342 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Sep 3, 2026, 7:29 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Influence of Edible Marijuana on Endurance Exercise Performance

NCT05192239
View directory record Official record
Conditions
Endurance Exercise
Interventions
THC 5, Placebo
Drug
Lead sponsor
Christopher Bell
Other
Eligibility
21 Years to 40 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 21, 2024 · Synced Sep 3, 2026, 7:29 AM EDT
Terminated Not applicable Interventional

Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes

NCT02212652
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency
Interventions
Vitamin D, Placebo, Standard of Care
Dietary Supplement · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 64 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 5, 2019 · Synced Sep 3, 2026, 7:29 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

A Randomized Double Blind, Placebo Controlled Clinical Study Evaluating the Efficacy and Safety of Magnesium Supplementation on Relaxation in Adults

NCT07029607
View directory record Official record
Conditions
Healthy
Interventions
Placebo, Dietary Supplement with actives
Dietary Supplement
Lead sponsor
Olly, PBC
Industry
Eligibility
18 Years to 50 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
St. Petersburg, Florida
Source: ClinicalTrials.gov public record
Updated Jun 18, 2025 · Synced Sep 3, 2026, 7:29 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

The Use of Functional Confections in Promoting Oral Health

NCT01514552
View directory record Official record
Conditions
Oral Health, Oral Cancer, Gum Disease
Interventions
Strawberry gummy, Placebo control gummy
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 70 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 19, 2025 · Synced Sep 3, 2026, 7:29 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Cannabis for Obesity Trial

NCT06137365
View directory record Official record
Conditions
Obesity
Interventions
Cannabis, Placebo
Drug
Lead sponsor
Joshua A. Lile, Ph.D.
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Aug 6, 2026 · Synced Sep 3, 2026, 7:29 AM EDT
Terminated Phase 2 Interventional Results available

Phase IIa L-serine Trial for eAD

NCT03062449
View directory record Official record
Conditions
Alzheimer Disease
Interventions
L-Serine, Placebo Gummy
Drug · Other
Lead sponsor
Aleksandra Stark
Other
Eligibility
Not listed
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 2, 2024 · Synced Sep 3, 2026, 7:29 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Study to Investigate the Efficacy of a Digestive Health Dietary Supplement on Post-meal Bloating in Healthy Participants

NCT07516587
View directory record Official record
Conditions
Digestive Health, Abdominal Discomfort, Gas and Bloating
Interventions
Bloat Gummies, Placebo
Dietary Supplement
Lead sponsor
Arrae
Industry
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 3, 2026, 7:29 AM EDT
Enrolling by invitation Not applicable Interventional

Postbiotics for Mitigation of Postoperative Dysbiosis in Gastrointestinal Cancer Surgery

NCT07050485
View directory record Official record
Conditions
Colon Cancer, Gastrointestinal Cancer
Interventions
PoZibio, Inert placebo
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
2
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Dec 28, 2025 · Synced Sep 3, 2026, 7:29 AM EDT