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ClinicalTrials.gov public records Last synced Oct 10, 2026, 2:07 PM EDT

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Showing 97–120 of 344 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Vitamin D Deficiency Disease Clear all
Not yet recruiting Phase 2 Interventional

Reducing Inflammation to Improve Vascular and Bone Outcomes With Low-dose Colchicine in CKD

NCT07654231
View directory record Official record
Conditions
Chronic Kidney Disease Mineral and Bone Disorder, Hypertension, Diabetes, Dyslipidemia, Atherosclerotic Cardiovascular Disease (ASCVD), Chronic Kidney Disease (Stage 3)
Interventions
Low-dose Colchicine at 0.5mg daily, Usual Care
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 69 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Environmental Influences on Vitamin D Status

NCT00780247
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 27, 2008 · Synced Oct 10, 2026, 2:07 PM EDT
Terminated Early Phase 1 Interventional

Effects of Vitamin D on Renin Expression in Hypertensive Patients

NCT00585442
View directory record Official record
Conditions
Hypertension, Vitamin D Deficiency
Interventions
calcitriol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
55 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 27, 2016 · Synced Oct 10, 2026, 2:07 PM EDT
Active, not recruiting No phase listed Observational

X-linked Hypophosphatemia Disease Monitoring Program

NCT03651505
View directory record Official record
Conditions
X-linked Hypophosphatemia, Hypophosphatemic Rickets
Interventions
No intervention
Other
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
Not listed
Enrollment
782 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2032
U.S. locations
24
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 18 more
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 2 Interventional

Vitamin D3 Supplementation for Heart Failure Patients

NCT01636570
View directory record Official record
Conditions
Heart Failure, Vitamin D Deficiency, Cardiomyopathy, Congestive Heart Failure
Interventions
Placebo Comparator: Sugar Pill, Vitamin D3 (cholecalciferol)
Drug
Lead sponsor
Heidi Moretti, MS, RD
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Missoula, Montana
Source: ClinicalTrials.gov public record
Updated Apr 26, 2017 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 3 Interventional Results available

Open Label Study of KRN23 on Osteomalacia in Adults With X-linked Hypophosphatemia (XLH)

NCT02537431
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
burosumab
Biological
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
5
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2024 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 2 Interventional Results available

Study of KRN23 (Burosumab), a Recombinant Fully Human Monoclonal Antibody Against Fibroblast Growth Factor 23 (FGF23), in Pediatric Subjects With X-linked Hypophosphatemia (XLH)

NCT02163577
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
burosumab
Biological
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
5 Years to 12 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
4
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 1 more
Source: ClinicalTrials.gov public record
Updated May 6, 2024 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

How Does Magnesium Status Influence Calcium Homeostasis?

NCT01593501
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 Nov 1, 2016 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D in Vulnerable Adults (VIVA-VA)

NCT01170273
View directory record Official record
Conditions
Frail Elderly, Vitamin d Deficiency
Interventions
vitamin D, placebo
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
65 Years to 95 Years · Male only
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 21, 2016 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Supplementation During Pregnancy on Clinical Outcomes and Immune Function

NCT01417351
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
400 IU vitamin D3, 2,000 IU Vitamin D3
Dietary Supplement
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 45 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
2
States / cities
Davis, California • Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 23, 2013 · Synced Oct 10, 2026, 2:07 PM EDT
Not listed Not applicable Interventional

Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications

NCT04229368
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 16, 2023 · Synced Oct 10, 2026, 2:07 PM EDT
Recruiting Phase 2 Interventional

Vitamin A Supplementation in Allogeneic Stem Cell Transplantation.

NCT06450925
View directory record Official record
Conditions
Graft Vs Host Disease, Vitamin A Deficiency, Vitamin D Deficiency
Interventions
Vitamin A, Placebo
Drug · Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years and older
Enrollment
190 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
3
States / cities
Tampa, Florida • Buffalo, New York • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

The Effect of Vitamin D Statues on Endothelial Function

NCT01049048
View directory record Official record
Conditions
Cardiovascular Diseases, Vitamin D Deficiency
Interventions
Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 65 Years · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 5, 2015 · Synced Oct 10, 2026, 2:07 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

ALPCO 25(OH) Vitamin D CLIA Kit - Fresh Versus Frozen Serum and Plasma Stability Study

NCT07565064
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency, Healthy Volunteers
Interventions
ALPCO 25(OH) Vitamin D CLIA Kit
Device
Lead sponsor
American Laboratory Products Company
Industry
Eligibility
22 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Salem, New Hampshire
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Terminated Phase 4 Interventional Results available

Vitamin D Deficiency in Patients With Hypertension

NCT00974922
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 9, 2018 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D on Cardiovascular Health in Black Women

NCT05656742
View directory record Official record
Conditions
Vitamin d Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Jan 24, 2025 · Synced Oct 10, 2026, 2:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D Status and the Adequacy of Vitamin D Intake in Early Preterm Infants

NCT01793402
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 19, 2013 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety and Efficacy Study of Asfotase Alfa in Severely Affected Infants With Hypophosphatasia (HPP)

NCT00744042
View directory record Official record
Conditions
Hypophosphatasia (HPP)
Interventions
asfotase alfa
Biological
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
Up to 36 Months
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
6
States / cities
Little Rock, Arkansas • Wilmington, Delaware • Springfield, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 1, 2019 · Synced Oct 10, 2026, 2:07 PM EDT
Active, not recruiting No phase listed Observational

Vitamin D and Immune Mechanisms of Hypertension in Type 2 Diabetics

NCT03348280
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Hypertension, Vitamin D Deficiency
Interventions
Blood draw
Diagnostic Test
Lead sponsor
Washington University School of Medicine
Other
Eligibility
25 Years to 80 Years
Enrollment
40 participants
Timeline
2017 – 2026
U.S. locations
2
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 24, 2025 · Synced Oct 10, 2026, 2:07 PM EDT
Active, not recruiting Phase 2 Interventional

ADAPT Study: Long-term Safety Study of INZ-701 in Patients With ENPP1 Deficiency and ABCC6 Deficiency

NCT06462547
View directory record Official record
Conditions
Gene Mutations, Pseudoxanthoma Elasticum, Arterial Calcification, Ectonucleotide Pyrophosphatase/phosphodiesterase1 Deficiency, Autosomal Recessive Hypophosphatemic Rickets Type 2
Interventions
INZ-701
Drug
Lead sponsor
Inozyme Pharma
Industry
Eligibility
1 Year and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
2
States / cities
Rochester, Minnesota • Eatontown, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Nutrition and Body Composition in Acute Lymphoblastic Leukemia

NCT01317940
View directory record Official record
Conditions
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Interventions
Vitamin D and Calcium Citrate
Dietary Supplement
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
10 Years to 29 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 8, 2020 · Synced Oct 10, 2026, 2:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D Deficiency and Low Bone Mineral Content in Children

NCT00756899
View directory record Official record
Conditions
Vitamin D Deficiency, Obesity
Interventions
Not listed
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
3 Years to 12 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 26, 2012 · Synced Oct 10, 2026, 2:07 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Preeclampsia Research on Vitamin D, Inflammation, & Depression

NCT03018132
View directory record Official record
Conditions
Pre-Eclampsia, Depression, Inflammation, Vitamin D Deficiency
Interventions
mental health screening, education and referral program
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 7, 2024 · Synced Oct 10, 2026, 2:07 PM EDT
Terminated No phase listed Observational

PROPEL - A Prospective Observational Patient Registry to Evaluate ENPP1 and ABCC6 Deficiency

NCT06302439
View directory record Official record
Conditions
Ectonucleotide Pyrophosphatase/Phosphodiesterase 1 Deficiency, ATP-Binding Cassette Subfamily C Member 6 Deficiency
Interventions
No Intervention for this observational study
Other
Lead sponsor
Inozyme Pharma
Industry
Eligibility
Not listed
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
5
States / cities
Chicago, Illinois • Boston, Massachusetts • Rochester, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 10, 2026, 2:07 PM EDT