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ClinicalTrials.gov public records Last synced May 21, 2026, 8:27 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 55 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vitamin D Status Clear all
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Creighton University
Other
Eligibility
18 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 23, 2010 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Obesity
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 18 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced May 21, 2026, 8:27 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Status, Glucose Tolerance, Blood Pressure, Bone Mineral Density, Hyperlipidemia
Interventions
Vitamin D
Other
Lead sponsor
Baltimore VA Medical Center
Federal
Eligibility
45 Years to 85 Years
Enrollment
362 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 19, 2021 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Hemophilia A, Hemophilia B, Vitamin D Deficiency
Interventions
Vitamin D and calcium
Dietary Supplement
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
2 Years to 21 Years · Male only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 28, 2016 · Synced May 21, 2026, 8:27 PM EDT
Completed Early Phase 1 Interventional
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Vitamin D, Calcium carbonate, Vitamin D, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 21, 2014 · Synced May 21, 2026, 8:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Pregnancy
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
21 Years and older · Female only
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Feb 13, 2017 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Cholecalciferol, Placebo
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 12, 2016 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Burns, Bone Demineralization
Interventions
Vitamin D2, Vitamin D3
Dietary Supplement
Lead sponsor
Shriners Hospitals for Children
Other
Eligibility
6 Months to 18 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2011
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated May 8, 2012 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 3 Interventional
View directory record Official record
Conditions
Type 2 Diabetes, Nonalcoholic Fatty Liver Disease, Vitamin D Deficiency
Interventions
Ergocalciferol, placebo
Dietary Supplement
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
10 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 9, 2017 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
1,000 IU vitamin D2, placebo capsule, mushrooms, UVB-treated mushrooms, 400 IU vitamin D2, UVB-treated mushrooms, 1,000 IU vitamin D2
Dietary Supplement · Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
20 Years to 59 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2011 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Magnesium Deficiency, Calcium Metabolism Disorders
Interventions
vitamin D3
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
30 Years to 75 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 31, 2016 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D, Prematurity
Interventions
Vitamin D3, vitamin D3 placebo
Dietary Supplement
Lead sponsor
University of Nebraska
Other
Eligibility
5 Minutes to 3 Months
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced May 21, 2026, 8:27 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Nutritional Status, Serum Biomarkers
Interventions
Dietary Supplement (Kids Multi & Omegas)
Dietary Supplement
Lead sponsor
SF Research Institute, Inc.
Network
Eligibility
4 Years to 15 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Determine Effect of Vitamin D on Bone Health in Elderly African American Women
Interventions
Vitamin D 3, placebo
Dietary Supplement · Other
Lead sponsor
Winthrop University Hospital
Other
Eligibility
60 Years and older · Female only
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2016
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
New Biomarkers for Measuring Vitamin D Level
Interventions
Vitamin D Supplementation, Placebo, Calcium
Dietary Supplement · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
60 Years to 90 Years · Female only
Enrollment
444 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Renal Insufficiency, Chronic, Kidney Failure, Chronic
Interventions
NanoD4CKD, MicroD4CKD
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 9, 2024 · Synced May 21, 2026, 8:27 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available
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 May 21, 2026, 8:27 PM EDT
Not listed Not applicable Interventional
View directory record Official record
Conditions
Hip Arthropathy, Knee Arthropathy, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 15, 2023 · Synced May 21, 2026, 8:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Status
Interventions
Not listed
Lead sponsor
Creighton University
Other
Eligibility
19 Years to 90 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Apr 1, 2008 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Vitamin D Deficiency, Accidental Falls
Interventions
Vitamin D3, Vitamin E
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
65 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 8, 2019 · Synced May 21, 2026, 8:27 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ergocalciferol (vitamin D2), Sperti Del Sol Lamp, Vitamin D3
Drug · Device
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
18 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 20, 2014 · Synced May 21, 2026, 8:27 PM EDT
Completed No phase listed Observational Results available
View directory record Official record
Conditions
Colon Cancer
Interventions
Screening Colonoscopy
Other
Lead sponsor
Mike O'Callaghan Military Hospital
Federal
Eligibility
18 Years and older
Enrollment
298 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jan 21, 2024 · Synced May 21, 2026, 8:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
1 Day to 1 Week
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 18, 2013 · Synced May 21, 2026, 8:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Creighton University
Other
Eligibility
18 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Anchorage, Alaska
Source: ClinicalTrials.gov public record
Updated Oct 26, 2008 · Synced May 21, 2026, 8:27 PM EDT