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

Role of Centrum® Silver® in Improving Micronutrient Status in Older Men

NCT03004807
View directory record Official record
Conditions
Vitamin Deficiency, Mineral Deficiency, Aging
Interventions
Centrum Silver Mens' Formula, Control
Dietary Supplement · Other
Lead sponsor
Oregon State University
Other
Eligibility
65 Years and older · Male only
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Jun 7, 2025 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

Passive Immunity Trial for Our Nation to Treat COVID-19 in Hospitalized Adults

NCT04362176
View directory record Official record
Conditions
COVID-19, Coronavirus, SARS-CoV-2
Interventions
pathogen reduced SARS-CoV-2 convalescent plasma, Placebo
Biological
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
974 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
26
States / cities
Little Rock, Arkansas • La Jolla, California • Aurora, Colorado + 22 more
Source: ClinicalTrials.gov public record
Updated Nov 2, 2022 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 2Phase 3 Interventional Results available

PTH & Ibandronate Combination Study (PICS)

NCT00683163
View directory record Official record
Conditions
Osteoporosis
Interventions
PTH(1-84), Ibandronate, Placebo injection, Placebo pills
Drug · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Nov 4, 2013 · Synced Sep 26, 2026, 10:09 AM EDT
Completed No phase listed Observational

Vitamins, Breastmilk HIV Shedding, and Child Health

NCT00197756
View directory record Official record
Conditions
Maternal and Child Health Outcomes
Interventions
Vitamin A alone, Multivitamins excluding vitamin A, multivitamins including vitamin A, Placebo
Dietary Supplement · Other
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older · Female only
Enrollment
771 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 20, 2009 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

Trial to Assess Chelation Therapy 2

NCT02733185
View directory record Official record
Conditions
Diabetes, Myocardial Infarction
Interventions
disodium EDTA, Oral Multi Vitamins/Minerals (OMVM), Placebo disodium EDTA, Placebo Oral Multi Vitamins/Minerals (OMVM)
Drug · Dietary Supplement
Lead sponsor
Mt. Sinai Medical Center, Miami
Other
Eligibility
50 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Miami Beach, Florida
Source: ClinicalTrials.gov public record
Updated Mar 29, 2025 · Synced Sep 26, 2026, 10:09 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 26, 2026, 10:09 AM EDT
Completed Phase 3 Interventional

Prevention of Recurrent Aphthous Stomatitis Using Vitamins

NCT00527306
View directory record Official record
Conditions
Aphthous Stomatitis
Interventions
multivitamin
Dietary Supplement
Lead sponsor
UConn Health
Other
Eligibility
18 Years and older
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 26, 2020 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Use of Ritual Epost Postnatal Multivitamins During the Postpartum Period

NCT05736562
View directory record Official record
Conditions
Lactation Disorder - Postpartum Condition or Complication, Nutrition, Healthy
Interventions
Ritual Epre Multimineral-Vitamin Supplement, Placebo Control
Dietary Supplement
Lead sponsor
City University of New York
Other
Eligibility
18 Years and older · Female only
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
2
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigating the Effects of Cocoa Flavanol on Cognition Assessed Online

NCT04582617
View directory record Official record
Conditions
Aging, Cognitive Change
Interventions
Cocoa Extract, Cocoa Extract Placebo, Multivitamin, Multivitamin placebo
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
65 Years and older
Enrollment
3,959 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
2
States / cities
Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 6, 2023 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 2 Interventional Results available

Resuscitative Endocrinology:Single-dose Clinical Uses for Estrogen-Traumatic Brain Injury

NCT00973674
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
Premarin IV, Placebo
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
2
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 11, 2019 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Multi-vitamin Supplement in Adult Females

NCT03828097
View directory record Official record
Conditions
Health, Subjective
Interventions
Experimental supplement, Placebo
Dietary Supplement
Lead sponsor
Auburn University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
94 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Auburn, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 27, 2020 · Synced Sep 26, 2026, 10:09 AM EDT
Withdrawn Phase 2 Interventional

Chronic Fatigue Syndrome: A Presumptive Mitochondrial Disorder

NCT01471652
View directory record Official record
Conditions
Chronic Fatigue Syndrome
Interventions
Nutraceutical supplements, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
25 Years to 55 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2015 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

Clinical Trial Ceftriaxone in Subjects With ALS

NCT00349622
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis, ALS
Interventions
ceftriaxone, placebo
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
513 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
50
States / cities
Phoenix, Arizona • Davis, California • Fresno, California + 40 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2014 · Synced Sep 26, 2026, 10:09 AM EDT
Active, not recruiting Phase 2 Interventional Results available

Vitamin D and Physical Activity on Bone Health

NCT01419730
View directory record Official record
Conditions
Bone Metabolism Biomarkers, Bone Mineral Density, Physical Fitness
Interventions
Vitamin D3, Physical Activity
Drug · Behavioral
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 99 Years · Female only
Enrollment
191 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2026
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 26, 2026, 10:09 AM EDT
Terminated Not applicable Interventional

The Pittsburgh Vitamin D Study: Vitamin D Supplementation in Vitamin D-deficient Subjects at Risk of Lung Cancer

NCT02532062
View directory record Official record
Conditions
Deficiency of Vitamin D3, COPD
Interventions
Cholecalciferol, multivitamin, Placebo
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
50 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 25, 2018 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults

NCT02876315
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Redoxon VI, placebo
Dietary Supplement
Lead sponsor
Oregon State University
Other
Eligibility
55 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 30, 2022 · Synced Sep 26, 2026, 10:09 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

An Exploratory, Randomized, Blinded, Placebo-Controlled Trial of Folic Acid and L-methylfolate in Parkinson's Disease

NCT00853879
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Folic Acid, Vitamin B6, Vitamin B12, B6, B12, L-methylfolate, B6, B12, Placebo
Dietary Supplement
Lead sponsor
Northwell Health
Other
Eligibility
30 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2010
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated May 14, 2015 · Synced Sep 26, 2026, 10:09 AM EDT
Not listed No phase listed Observational

Digital Evaluations and Technologies Enabling Clinical Translation for AD

NCT05385913
View directory record Official record
Conditions
Alzheimer Disease, Early Onset
Interventions
Multivitamin-no intervention
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
65 Years and older
Enrollment
200 participants
Timeline
2022 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 5, 2023 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Strategies to Reduce Iron Deficiency

NCT02245321
View directory record Official record
Conditions
Iron Deficiency
Interventions
Ferrous gluconate- 19 mg, Ferrous gluconate- 38 mg, Letter Group- Information Provided, Letter - No Information Provided, Placebo
Dietary Supplement · Other
Lead sponsor
Westat
Other
Eligibility
18 Years to 100 Years
Enrollment
702 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
4
States / cities
Farmington, Connecticut • Rockville, Maryland • Pittsburgh, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 5, 2023 · Synced Sep 26, 2026, 10:09 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

Vitamin D Supplementation in the Prevention and Mitigation of COVID-19 Infection

NCT04482673
View directory record Official record
Conditions
COVID-19, Vitamin D Deficiency, Respiratory Viral Infection
Interventions
Daily Vitamin D3, Daily placebo, Bolus vitamin D3, Bolus placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
50 Years and older
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Feb 23, 2023 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

Daunorubicin & Cytarabine +/- Zosuquidar inTreating Older Patients With Newly Diagnosed Acute Myeloid Leukemia or Refractory Anemia

NCT00046930
View directory record Official record
Conditions
Leukemia, Myelodysplastic Syndromes
Interventions
filgrastim, sargramostim, cytarabine, daunorubicin hydrochloride, zosuquidar trihydrochloride, Placebo
Biological · Drug
Lead sponsor
Eastern Cooperative Oncology Group
Network
Eligibility
60 Years and older
Enrollment
449 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2002
U.S. locations
91
States / cities
Scottsdale, Arizona • Aurora, Colorado • Boulder, Colorado + 67 more
Source: ClinicalTrials.gov public record
Updated Jul 4, 2023 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

Convalescent Plasma in Outpatients With COVID-19

NCT04355767
View directory record Official record
Conditions
Covid19
Interventions
Convalescent Plasma, Saline
Biological
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
511 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
53
States / cities
Chandler, Arizona • Phoenix, Arizona • La Jolla, California + 41 more
Source: ClinicalTrials.gov public record
Updated Oct 18, 2021 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Phase 4 Interventional Results available

Vitamin D Repletion in Primary Hyperparathyroidism

NCT01306656
View directory record Official record
Conditions
Primary Hyperparathyroidism, Vitamin D Deficiency
Interventions
10,000 IU Vitamin D3, Placebo, Vitamin D
Drug · Other · Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 15, 2019 · Synced Sep 26, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigation of the Usefulness of Omega 3 Vitamins in the Relief of Hot Flashes in Menopausal Women.

NCT00599456
View directory record Official record
Conditions
Hot Flashes, Menopause
Interventions
Omega 3 fatty acid vitamins, Placebo capsules
Dietary Supplement
Lead sponsor
Christiana Care Health Services
Other
Eligibility
Up to 65 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated May 9, 2017 · Synced Sep 26, 2026, 10:09 AM EDT