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Showing 1–18 of 18 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: folic acid multivitamin Clear all
Withdrawn Phase 4 Interventional

Histidine Oral Supplementation as a Therapeutic Modality for Alzheimer's Disease

NCT06169826
View directory record Official record
Conditions
Alzheimer Disease
Interventions
l-Histidine, Control
Drug · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
50 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Use of Ritual Prenatal Multivitamins for Pregnancy

NCT05673070
View directory record Official record
Conditions
Pregnancy Related, Nutrition, Healthy
Interventions
Ritual Epre Multivitamin-mineral supplement, control MVI
Dietary Supplement
Lead sponsor
City University of New York
Other
Eligibility
18 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Results available

Atherosclerosis Prevention in Pediatric Lupus Erythematosus (APPLE)

NCT00065806
View directory record Official record
Conditions
Lupus Erythematosus, Systemic
Interventions
Atorvastatin, Placebo atorvastatin
Drug
Lead sponsor
Laura Schanberg
Other
Eligibility
10 Years to 21 Years
Enrollment
221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 14, 2013 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional

Nutrition, Immunology and Epidemiology of Tuberculosis

NCT00197704
View directory record Official record
Conditions
Tuberculosis
Interventions
Multivitamins, Placebo
Dietary Supplement · Other
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older
Enrollment
876 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2004
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 10, 2010 · Synced Sep 21, 2026, 2:22 PM 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 21, 2026, 2:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Absorption of Transdermal Vitamins in Post Bariatric Surgery Patients

NCT03360435
View directory record Official record
Conditions
Bariatric Surgery Candidate, Vitamin Deficiency, Mineral Deficiency
Interventions
Patch MD MultiVitamin Plus patch
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 8, 2021 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Folic Acid for Vascular Outcome Reduction In Transplantation (FAVORIT)

NCT00064753
View directory record Official record
Conditions
Chronic Kidney Disease, Cardiovascular Disease, Death
Interventions
High Dose Multivitamin, Low Dose Multivitamin
Drug · Device
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
35 Years to 75 Years
Enrollment
4,110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2011
U.S. locations
27
States / cities
Birmingham, Alabama • Phoenix, Arizona • Los Angeles, California + 22 more
Source: ClinicalTrials.gov public record
Updated Oct 17, 2017 · Synced Sep 21, 2026, 2:22 PM 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 21, 2026, 2:22 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Benefits of Natural Medicine, Vitamin IV Therapy and Supplements: Maintaining Good Health Through Nature

NCT05067998
View directory record Official record
Conditions
Anxiety Disorders and Symptoms, Fibromyalgia, Arthritis, Chronic Pain, Hypertension,Essential
Interventions
IV Vitamin Infused Therapy Treatment, Herbal medicine
Dietary Supplement · Drug
Lead sponsor
Faith A. Richardson
Other
Eligibility
21 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Dover, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional

Vitamin Therapy for Prevention of Stroke

NCT00004734
View directory record Official record
Conditions
Stroke, Cerebral Infarction, Myocardial Infarction
Interventions
pyridoxine, cyanocobalamin, folic acid multivitamin
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
35 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2004
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional

A Multivitamin Comparison Study in Kidney Transplant Recipients.

NCT00217100
View directory record Official record
Conditions
Kidney Transplant Recipients
Interventions
Multivitamin, Placebo
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 24, 2012 · Synced Sep 21, 2026, 2:22 PM 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 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional

Trial of Vitamins in HIV Progression and Transmission

NCT00197743
View directory record Official record
Conditions
HIV Infections, Disease Transmission, Vertical
Interventions
Vitamin A + Beta Carotene, Multivitamins, Placebo
Dietary Supplement · Other
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older · Female only
Enrollment
1,085 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2003
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 10, 2010 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional

Multivitamin Dosage Regimens in the Prevention of Adverse Pregnancy Outcomes Among HIV-Positive Women

NCT00197678
View directory record Official record
Conditions
HIV Infections
Interventions
Multivitamins-Multiples of RDA, Multivitamins-Single RDA
Dietary Supplement
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older · Female only
Enrollment
1,141 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 10, 2010 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Not applicable Interventional Results available

VITATOPS: A Study of VITAmins TO Prevent Stroke

NCT00097669
View directory record Official record
Conditions
Stroke, Transient Ischemic Attack
Interventions
Active VITATOPS Tablet (folic acid 2mg, B6 25mg , B12 500ug) or placebo, Placebo
Drug · Other
Lead sponsor
VITATOPS
Government
Eligibility
Not listed
Enrollment
8,164 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2009
U.S. locations
4
States / cities
New York, New York • Abington, Pennsylvania • Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 24, 2020 · Synced Sep 21, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Antenatal Micronutrient Supplementation and Infant Survival

NCT00860470
View directory record Official record
Conditions
Infant Mortality, Preterm Birth, Low Birth Weight, Neonatal Mortality, Perinatal Mortality
Interventions
Iron (27 mg) - folic acid (600 ug), Multiple micronutrient
Dietary Supplement
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
12 Years to 45 Years · Female only
Enrollment
44,567 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 18, 2022 · Synced Sep 21, 2026, 2:22 PM 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 21, 2026, 2:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Folic Acid Supplementation in Pregnant Women: Dose Response

NCT02124642
View directory record Official record
Conditions
Pregnancy
Interventions
Folic acid, 400 mcg/day, Folic acid 800 mcg/day
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 4, 2018 · Synced Sep 21, 2026, 2:22 PM EDT