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ClinicalTrials.gov public records Last synced May 22, 2026, 12:21 AM EDT

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

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Vitamin Deficiency Clear all
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 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Hypercholesterolemia, Vitamin D Deficiency
Interventions
Vitamin D (1000 or 2000 IU/day), Placebo
Dietary Supplement · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 7, 2015 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Vitamin D 25 OH Deficiency
Interventions
Cholecalciferol, Cholecalciferol 5,000 IU
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 25, 2012 · Synced May 22, 2026, 12:21 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency, Metabolic Syndrome
Interventions
RDA Vitamin D3 only, Vitamin D2/3 Repletion only, Vitamin D2/3 Repletion + AEX, Vitamin D2/3 Repletion + RT
Dietary Supplement · Other
Lead sponsor
Baltimore VA Medical Center
Federal
Eligibility
40 Years to 85 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 4, 2014 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 2Phase 3 Interventional
View directory record Official record
Conditions
HIV-infection/Aids
Interventions
Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
5 Years to 24 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2017 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Hypophosphatasia
Interventions
asfotase alfa
Biological
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
24 Weeks to 42 Months
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2016
U.S. locations
5
States / cities
Wilmington, Delaware • Springfield, Missouri • Omaha, Nebraska + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 69 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 12, 2013 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Asthma, Vitamin D Deficiency, Pediatric Obesity
Interventions
Vitamin D3 oral regimen
Dietary Supplement
Lead sponsor
IDeA States Pediatric Clinical Trials Network
Network
Eligibility
6 Years to 17 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
15
States / cities
Little Rock, Arkansas • Wilmington, Delaware • Honolulu, Hawaii + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 18, 2023 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Prediabetes, Vitamin D Deficiency
Interventions
Cholecalciferol (vitamin D3)
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 19, 2008 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Dose 1, Dose 2
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D and Calcium
Dietary Supplement
Lead sponsor
CONRAD
Other
Eligibility
21 Years to 50 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 7, 2016 · Synced May 22, 2026, 12:21 AM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Neural Tube Defects, Folic Acid Deficiency, Spina Bifida, Anencephaly-Spina Bifida, B12 Deficiency Vitamin, Anemia, Iron Deficiency Anaemia Due to Dietary Causes
Interventions
Micronutrient fortified iodized salt
Dietary Supplement
Lead sponsor
Hydrocephalus and Neuroscience Institute
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jul 13, 2025 · Synced May 22, 2026, 12:21 AM EDT
Terminated No phase listed Observational
View directory record Official record
Conditions
Epilepsy, Magnesium Deficiency, Vitamin D Deficiency
Interventions
No Intervention. Study is Cross Sectional in nature
Other
Lead sponsor
Drexel University
Other
Eligibility
18 Years to 70 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 28, 2021 · Synced May 22, 2026, 12:21 AM EDT
Not listed Not applicable Interventional
View directory record Official record
Conditions
Vitamin D Deficiency, Hepatocellular Carcinoma
Interventions
Vitamin D3 4000 IU, Vitamin D3 2000 IU
Drug
Lead sponsor
Andrea Branch
Other
Eligibility
18 Years and older
Enrollment
50 participants
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 Oct 23, 2012 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D2, Placebo
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
12 Years to 18 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 16, 2017 · Synced May 22, 2026, 12:21 AM EDT
Terminated Phase 4 Interventional Results available
View directory record Official record
Conditions
Vitamin D Deficiency, Hypertension
Interventions
Aliskiren, Cholecalciferol, Placebo
Drug · Dietary Supplement
Lead sponsor
UConn Health
Other
Eligibility
21 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 8, 2018 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Iron Overload, Oxidative Stress, Iron-deficiency Anemia
Interventions
Iron, Placebo
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older · Female only
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced May 22, 2026, 12:21 AM EDT
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Chronic Kidney Disease stage3, Chronic Kidney Disease stage4, Vitamin d Deficiency, Secondary Hyperparathyroidism
Interventions
CTAP101, Placebo
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
8 Years to 17 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
2
States / cities
Columbus, Ohio • Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 24, 2025 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Type 2 Diabetes, Vitamin D Deficiency
Interventions
Vitamin D2, Sugar pill
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
12 Years to 18 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 19, 2014 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Morbid Obesity, Vitamin D Deficiency
Interventions
vitamin D3 (Replesta), vitamin D
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 60 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jun 22, 2015 · Synced May 22, 2026, 12:21 AM EDT
Terminated Not applicable Interventional
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
Not listed
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 19, 2020 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Hypophosphatasia
Interventions
asfotase alfa
Drug
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
13 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
2
States / cities
St Louis, Missouri • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced May 22, 2026, 12:21 AM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Hematopoietic Stem Cell Transplantation, Delirium, Thiamine Deficiency
Interventions
Thiamine, Normal saline
Drug
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 18, 2021 · Synced May 22, 2026, 12:21 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Vitamin D Deficiency, Metabolic Syndrome, Prediabetes
Interventions
Mushroom with 600 IU vitamin D2, Mushroom with 4000 IU Vitamin D2, 600 IU Vitamin D3 and untreated mushroom, 4000 IU Vitamin D3 and untreated mushroom, Placebo
Dietary Supplement · Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
30 Years to 90 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 13, 2017 · Synced May 22, 2026, 12:21 AM EDT