Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Jul 23, 2026, 2:01 AM EDT

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

Showing 25–47 of 23 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Vitamin D Deficiency/Insufficiency Clear all
Completed No phase listed Observational

Ergocalciferol in Chronic Kidney Disease

NCT00411294
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Not listed
Lead sponsor
Saint Louis VA Medical Center
Federal
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 12, 2006 · Synced Jul 23, 2026, 2:01 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Phosphate Assessment in Chronic Kidney Disease Patients Study

NCT07368946
View directory record Official record
Conditions
Chronic Kidney Disease (Stage 3-4), Chronic Kidney Disease Mineral and Bone Disorder
Interventions
Dietary Phosphorus Intake
Dietary Supplement
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Jul 23, 2026, 2:01 AM EDT
Recruiting No phase listed Observational

Precision Medicine Approaches to Renal Osteodystrophy

NCT05880914
View directory record Official record
Conditions
Renal Osteodystrophy, Chronic Kidney Diseases, CKD-MBD, Bone Turnover Rate Disorder, Secondary Hyperparathyroidism
Interventions
miRNAseq analysis, Standard treatment for bone disorder
Procedure · Drug
Lead sponsor
Thomas Nickolas
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Jul 23, 2026, 2:01 AM EDT
Terminated Phase 3 Interventional Results available

Phase 3 Safety and Efficacy Study of CTAP101 Extended-release Capsules in Children With Secondary Hyperparathyroidism

NCT05543928
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 Jul 23, 2026, 2:01 AM EDT
Completed Phase 4 Interventional Results available

Vitamin D Repletion in Stone Formers With Hypercalciuria

NCT01295879
View directory record Official record
Conditions
Nephrolithiasis, Urolithiasis, Idiopathic Hypercalciuria, Vitamin D Deficiency, Disorder of Vitamin D
Interventions
Ergocalciferol
Drug
Lead sponsor
New York Presbyterian Hospital
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 22, 2012 · Synced Jul 23, 2026, 2:01 AM EDT
Withdrawn Phase 4 Interventional

Effect of Ergocalciferol on Iron Metabolism in Individuals With Chronic Kidney Disease

NCT03073369
View directory record Official record
Conditions
CKD, Chronic Kidney Diseases, Hepcidin, Ergocalciferol, Vitamin D, Iron-deficiency, Anemia
Interventions
Ergocalciferol 50000 UNT, Placebo
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 14, 2018 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Phase 3 Interventional Results available

The Effects of Vitamin D Repletion in Vitamin D Deficient Patients With Stage 3 and 4 Chronic Kidney Disease

NCT01029002
View directory record Official record
Conditions
Chronic Renal Insufficiency, Proteinuria
Interventions
Vitamin D, Placebo
Drug · Other
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
18 Years and older
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Aug 15, 2023 · Synced Jul 23, 2026, 2:01 AM EDT
Completed No phase listed Observational

Pathogenesis of Compromised Bone Quality and Mechanics in Chronic Kidney Disease

NCT03626246
View directory record Official record
Conditions
Chronic Kidney Disease, End Stage Kidney Disease, Chronic Kidney Disease Mineral and Bone Disorder, Renal Osteodystrophy, Secondary Hyperparathyroidism
Interventions
Kidney disease
Other
Lead sponsor
Columbia University
Other
Eligibility
40 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 12, 2021 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Phase 4 Interventional Results available

Vitamin D and Coronary Calcification Study

NCT00752102
View directory record Official record
Conditions
Chronic Kidney Disease, Vitamin D Deficiency, Coronary Calcification, Disorders of Calcium and Bone Metabolism
Interventions
Calcitriol (Rocaltrol®), Paricalcitol
Drug
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
25 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 7, 2017 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Not applicable Interventional

The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM

NCT01697228
View directory record Official record
Conditions
Type 1 Diabetes, Vitamin D Deficiency/Insufficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
13 Years to 21 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 7, 2017 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Phase 1Phase 2 Interventional

The Effect of Oral Niacinamide on Plasma Phosphorus Levels in Peritoneal Dialysis Patients

NCT00508885
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Niacinamide, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
17 participants
Timeline
2006 – 2007
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 29, 2007 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Phase 3 Interventional Results available

Vitamin D and Arterial Function in Patients With Chronic Kidney Disease

NCT01384539
View directory record Official record
Conditions
Arterial Dysfunction, Chronic Kidney Disease
Interventions
Cholecalciferol, Calcitriol
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 80 Years
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 27, 2018 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D

NCT04865432
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency
Interventions
UVB treatment
Device
Lead sponsor
Boston University
Other
Eligibility
22 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 22, 2022 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Defining Vitamin D Insufficiency in School Age Children: A Randomized Placebo Controlled Trial of Vitamin D3

NCT00732758
View directory record Official record
Conditions
Healthy
Interventions
Vitamin D3 1000 IU, Placebo Tablet
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
8 Years to 14 Years
Enrollment
157 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 28, 2015 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Insufficiency in Man

NCT01848236
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D2, Vitamin D3
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 2, 2020 · Synced Jul 23, 2026, 2:01 AM EDT
Terminated Not applicable Interventional

Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes

NCT02212652
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency
Interventions
Vitamin D, Placebo, Standard of Care
Dietary Supplement · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 64 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 5, 2019 · Synced Jul 23, 2026, 2:01 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Phosphorus Absorption in Healthy Adults and in Patients With Moderate Chronic Kidney Disease

NCT03108222
View directory record Official record
Conditions
Chronic Kidney Disease Mineral and Bone Disorder
Interventions
Phosphorus Absorption Test
Other
Lead sponsor
Purdue University
Other
Eligibility
30 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 9, 2019 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Vitamin D and Arterial Stiffness in Elderly

NCT03649802
View directory record Official record
Conditions
Vitamin D Deficiency, Arterial Stiffness
Interventions
Low dose vitamin D3, High dose vitamin D3
Dietary Supplement
Lead sponsor
Texas Tech University Health Sciences Center
Other
Eligibility
65 Years to 89 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Mar 20, 2022 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Not applicable Interventional Results available

Impact of Vitamin D Repletion in Hemodialysis Patients

NCT01175798
View directory record Official record
Conditions
Vitamin D Deficiency, End-stage Renal Disease
Interventions
Cholecalciferol
Drug
Lead sponsor
Mehrotra, Anita, M.D.
Individual
Eligibility
18 Years and older
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 21, 2014 · Synced Jul 23, 2026, 2:01 AM EDT
Active, not recruiting Phase 2 Interventional

DePTH: De-emphasize PTH

NCT06288451
View directory record Official record
Conditions
Kidney Failure, Chronic, Chronic Kidney Disease-Mineral and Bone Disorder
Interventions
Oral calcitriol with cinacalcet rescue, IV activated vitamin D
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 1, 2025 · Synced Jul 23, 2026, 2:01 AM EDT
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 21, 2026 · Synced Jul 23, 2026, 2:01 AM EDT
Completed Not applicable Interventional Results available

Improving Vitamin D Status in Home-bound Elders

NCT01410084
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 Jul 23, 2026, 2:01 AM EDT
Completed Not applicable Interventional

Vitamin D Levels and Vitamin D Education in Geriatric Patients

NCT00273611
View directory record Official record
Conditions
Vitamin D Insufficiency, Vitamin D Deficiency
Interventions
Pharmacist Education about Vitamin D
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
65 Years to 89 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 19, 2013 · Synced Jul 23, 2026, 2:01 AM EDT