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ClinicalTrials.gov public records Last synced Oct 4, 2026, 8:53 PM EDT

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Showing 145–168 of 374 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Dietary Supplement/Vitamins Clear all
Terminated Phase 2 Interventional Results available

Clinical Trial of a Nutritional Supplement in Adults With Bipolar Disorder

NCT00109577
View directory record Official record
Conditions
Bipolar Disorder
Interventions
MCN36 (nutritional supplement), Placebo
Drug
Lead sponsor
University of Calgary
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2012 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional

The Effects of Nutrition Supplementation and Education on the Healing of Diabetic Foot Ulcer (DFU)

NCT04055064
View directory record Official record
Conditions
Diabetic Foot Ulcer
Interventions
glucose control nutritional shake, nutrition education
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
30 Years to 70 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Aug 13, 2019 · Synced Oct 4, 2026, 8:53 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

The Effects of Vitamin C on Acute-Exercise in Postmenopausal Females

NCT07109115
View directory record Official record
Conditions
Females, Males, Menopause, Sedentary, Healthy Participants
Interventions
Vitamin C (Ascorbic Acid)
Dietary Supplement
Lead sponsor
University of Virginia
Other
Eligibility
45 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 17, 2026 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Assessment of Endogenous Oxalate Synthesis

NCT05229952
View directory record Official record
Conditions
Healthy, Kidney Stone, Obesity
Interventions
Low-oxalate controlled diet, Primed, continuous intravenous infusion of 13C2-oxalate
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 75 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 13, 2025 · Synced Oct 4, 2026, 8:53 PM EDT
Recruiting Not applicable Interventional

B6 Administration for Levetiracetam-Associated Neurobehavioral Changes and Epilepsy

NCT07271966
View directory record Official record
Conditions
Brain Tumor Related Epilepsy (BTRE)
Interventions
Vitamin B6 100 MG
Dietary Supplement
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 4, 2026, 8:53 PM EDT
Terminated Phase 2 Interventional

Cholecalciferol Supplementation in Strengthening Inspiratory Muscles in Cholecalciferol-Deficient Patients With Chronic Obstructive Pulmonary Disease

NCT02877641
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Muscle Weakness
Interventions
Cholecalciferol, Laboratory Biomarker Analysis, Multivitamin, Placebo, Questionnaire Administration
Dietary Supplement · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
50 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Feb 15, 2017 · Synced Oct 4, 2026, 8:53 PM EDT
Recruiting Not applicable Interventional

GLYLO Supplement Pilot Trial on Glycation and Aging in Postmenopausal Women

NCT06813261
View directory record Official record
Conditions
Postmenopause, Metabolism, Geroscience
Interventions
GLYLO, Placebo
Other
Lead sponsor
Buck Institute for Research on Aging
Other
Eligibility
45 Years to 65 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Novato, California
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Oct 4, 2026, 8:53 PM EDT
Not listed Not applicable Interventional

Viome Precision Nutritional Programs to Improve Clinical Outcomes for Mental Health Disorders

NCT06502717
View directory record Official record
Conditions
Mental Health Issue, Depression, Anxiety
Interventions
VIOME Precision Nutrition Program
Combination Product
Lead sponsor
Viome
Industry
Eligibility
25 Years to 75 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

EpiCor Clinical Study on Rapid Immune Modulating Effects

NCT05819424
View directory record Official record
Conditions
Immune Surveillance
Interventions
Yeast Fermentate (EpiCor)
Dietary Supplement
Lead sponsor
Cargill
Industry
Eligibility
18 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Klamath Falls, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 25, 2024 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Single Group Study to Evaluate the Effects of a Myo-Inositol and D-Chiro Inositol Supplement on Symptoms Associated With Polycystic Ovary Syndrome and Hormone Imbalance

NCT06158932
View directory record Official record
Conditions
Polycystic Ovary Syndrome, Hormone Imbalance
Interventions
Optify Myo Inositol and D-Chiro Inositol Plus Folate and Vitamin D supplement
Dietary Supplement
Lead sponsor
Optify
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Apr 3, 2024 · Synced Oct 4, 2026, 8:53 PM EDT
Recruiting Not applicable Interventional

Evaluation of the Clinical and Psychological Impact of Vitamin D Replacement in Adolescent Females at Risk for Polycystic Ovarian Syndrome (PCOS)

NCT04355572
View directory record Official record
Conditions
Polycystic Ovarian Syndrome in Adolescent Females, Vitamin D Deficiency
Interventions
Vitamin D 4000IU daily, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
13 Years to 21 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 4, 2026, 8:53 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

A Study to Assess the Impact of a Nutritional Supplement on Wellbeing and Nutrient Absorption

NCT06749808
View directory record Official record
Conditions
Nutrition Status
Interventions
Carotenoid Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Pharmanex
Industry
Eligibility
20 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Provo, Utah
Source: ClinicalTrials.gov public record
Updated Dec 31, 2024 · Synced Oct 4, 2026, 8:53 PM EDT
Active, not recruiting Not applicable Interventional

Nutritional Intervention for Endometriosis

NCT05175248
View directory record Official record
Conditions
Endometriosis
Interventions
Plant-based Intervention Group
Behavioral
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2029
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Open-label Study to Assess Increasing Levels of NAD+(Nicotinamide Adenine Dinucleotide)

NCT03707652
View directory record Official record
Conditions
Increase in Blood Levels of Nicotinamide Adenine Dinucleotide (NAD+)
Interventions
Oral supplement A, Oral supplement B, Oral supplement C, Oral supplement D, Oral Supplement D in combination with oral supplement C
Dietary Supplement
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
30 Years to 80 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Oct 18, 2018 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional

Efficacy of Vitamin D Supplementation in Obese Children

NCT02956408
View directory record Official record
Conditions
Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
5 Years to 11 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 4, 2026, 8:53 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Impact of Probiotics on Drug, Vitamin, and Hormone Metabolism

NCT04281407
View directory record Official record
Conditions
Metabolism
Interventions
Visbiome
Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 24, 2020 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Phase 4 Interventional Results available

Zoledronic Acid for Osteoporotic Fracture Prevention (ZEST II)

NCT02589600
View directory record Official record
Conditions
Osteoporotic Fractures, Osteoporosis, Postmenopausal
Interventions
Zoledronic acid, vitamin D, calcium, Saline
Drug · Dietary Supplement · Other
Lead sponsor
Susan L. Greenspan
Other
Eligibility
65 Years and older · Female only
Enrollment
310 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
New Kensington, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 26, 2023 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Clinical Trial to Evaluate the Effects of a Supplement on Supporting Signs of a Healthy Metabolism

NCT07765407
View directory record Official record
Conditions
Poor Energy Levels, Poor Metabolism, Difficulty With Weight Management, Bloating
Interventions
Love Wellness Energize
Dietary Supplement
Lead sponsor
Love Wellness
Industry
Eligibility
25 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 14, 2026 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Enhanced Natural Killer Cell Activity and RBAC

NCT02019628
View directory record Official record
Conditions
Family Member
Interventions
Rice Bran Arabinoxylan Compound (RBAC)
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 10, 2023 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Combined Antioxidant and Preeclampsia Prediction Studies (CAPPS)

NCT00135707
View directory record Official record
Conditions
Preeclampsia
Interventions
Dietary Supplement/Vitamins, Placebo for Vitamin C and Vitamin E
Drug
Lead sponsor
The George Washington University Biostatistics Center
Other
Eligibility
Female only
Enrollment
10,154 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
16
States / cities
Birmingham, Alabama • Chicago, Illinois • Detroit, Michigan + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 21, 2019 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Not applicable Interventional Results available

A Trial of Vitamin D Therapy in Patients With Heart Failure

NCT01125436
View directory record Official record
Conditions
Heart Failure
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
Case Western Reserve University
Other
Eligibility
50 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 10, 2022 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effectiveness of a Vitamin Mineral Supplement

NCT00153764
View directory record Official record
Conditions
Healthy
Interventions
Cooper Complete One-A-Day Vitamin Supplement
Drug
Lead sponsor
The Cooper Institute
Other
Eligibility
30 Years to 70 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 2, 2012 · Synced Oct 4, 2026, 8:53 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Role of Vitamin D in Menopause: Relationship to Menopausal Symptoms in Body Composition

NCT01141972
View directory record Official record
Conditions
Hot Flushes, Menopause, Premature, Obesity, Vitamin D Deficiency
Interventions
Vitamin D, Placebo
Dietary Supplement · Other
Lead sponsor
Kaiser Permanente
Other
Eligibility
40 Years to 60 Years · Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated May 30, 2013 · Synced Oct 4, 2026, 8:53 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effects of EED on Zn Absorption and Retention in Children From a Standard Dose

NCT02760095
View directory record Official record
Conditions
Environmental Enteric Dysfunction, Zinc Deficiency, Vitamin A Deficiency
Interventions
3 mg zinc sulfate supplement, 0.5 mg of 13C10-retinyl-acetate
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Months to 24 Months
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 1, 2019 · Synced Oct 4, 2026, 8:53 PM EDT