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 come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 14, 2026, 7:26 PM EDT

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

Showing 361–384 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D (cholecalciferol) Clear all
Completed Phase 2 Interventional Results available

Safety and Efficacy of Rayaldee for Treating Mild to Moderate COVID-19

NCT04551911
View directory record Official record
Conditions
COVID-19, Coronavirus, SARS-CoV2 Infection
Interventions
Rayaldee, Placebo
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years and older
Enrollment
171 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
10
States / cities
San Francisco, California • Miami, Florida • Evanston, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated May 28, 2024 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Study of Vitamin D in Children With Sickle Cell Disease

NCT01276587
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Vitamin D3
Drug
Lead sponsor
Gary M Brittenham, MD
Other
Eligibility
3 Years to 20 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2023 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

The Effect of Vitamin D Supplementation on Muscle Power in Elite Cyclist

NCT01518725
View directory record Official record
Conditions
Muscle Power
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Oklahoma State University
Other
Eligibility
18 Years to 35 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 29, 2015 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 3 Interventional

Risedronate in Preventing Bone Loss in Premenopausal Women Receiving Chemotherapy for Primary Breast Cancer

NCT00054418
View directory record Official record
Conditions
Breast Cancer, Osteoporosis
Interventions
calcium carbonate, vitamin D, risedronate sodium, placebo
Dietary Supplement · Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
216 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
198
States / cities
Mobile, Alabama • Scottsdale, Arizona • Aurora, Colorado + 124 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2016 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Safety/Efficacy Study of CTAP101 in Chronic Kidney Disease Subjects With Secondary Hyperparathyroidism (SHPT)

NCT01219855
View directory record Official record
Conditions
Chronic Kidney Disease, Secondary Hyperparathyroidism, Vitamin D Insufficiency
Interventions
Cohort 1 CTAP101 Capsules- 60µg, Cohort 1 CTAP101 Capsules - 90µg, Cohort 1 Matching Sugar Capsule, Cohort 2 CTAP101 Capsules - 30µg, Cohort 2 Matching Sugar Capsule
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years to 85 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Bannockburn, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 25, 2016 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 2 Interventional Results available

Phase 2 Safety and Efficacy Study of a Vitamin D Compound (DP001) in Postmenopausal Women With Low Bone Mineral Density

NCT00715676
View directory record Official record
Conditions
Osteoporosis
Interventions
Placebo, DP001
Drug
Lead sponsor
Deltanoid Pharmaceuticals
Industry
Eligibility
55 Years to 80 Years · Female only
Enrollment
157 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
9
States / cities
Upland, California • Indianapolis, Indiana • Bethesda, Maryland + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 11, 2010 · Synced Oct 14, 2026, 7:26 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Oral Nutrition Impact on Tear Film

NCT01561040
View directory record Official record
Conditions
Dry Eye Syndrome
Interventions
Omega 3, Vitamins A, D3 and E
Dietary Supplement
Lead sponsor
Eye and Vision Technologies and Research Institute
Network
Eligibility
18 Years to 79 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
4
States / cities
Conifer, Colorado • Oak Lawn, Illinois • Lexington, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 26, 2012 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 3 Interventional Results available

Effect of Supplemental Vitamin D on Skeletal Muscle Function in Chronic Obstructive Pulmonary Disease (COPD) Patients

NCT00914810
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
Vitamin D (cholecalciferol), Placebo
Dietary Supplement
Lead sponsor
Minneapolis Veterans Affairs Medical Center
Federal
Eligibility
40 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 11, 2013 · Synced Oct 14, 2026, 7:26 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 Dec 1, 2022 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 3 Interventional Results available

Safety and Diagnostic Efficacy of Mangoral in Participants With Focal Liver Lesions and Reduced Kidney Function

NCT04119843
View directory record Official record
Conditions
Known or Suspected Focal Liver Lesions, Severe Renal Impairment
Interventions
Mangoral
Drug
Lead sponsor
Ascelia Pharma AB
Industry
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
14
States / cities
Scottsdale, Arizona • Los Angeles, California • Stanford, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 6, 2025 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Observe the Capability to Absorb Calcium as an Measure of Adequate Levels of Vitamin D

NCT01119378
View directory record Official record
Conditions
Postmenopausal, Vitamin D Deficiency
Interventions
Dual isotope technique
Other
Lead sponsor
Winthrop University Hospital
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Dec 31, 2014 · Synced Oct 14, 2026, 7:26 PM EDT
Terminated Not applicable Interventional Results available

Vitamin D Replacement: The Effect on Statin-Related Myalgias

NCT01022398
View directory record Official record
Conditions
HMG-CoA Reductase Inhibitors-related Myalgias
Interventions
cholecalciferol/placebo
Drug
Lead sponsor
Creighton University
Other
Eligibility
19 Years to 89 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated May 20, 2013 · Synced Oct 14, 2026, 7:26 PM EDT
Not listed Not applicable Interventional

Vitamin D Supplementation and TB

NCT01992263
View directory record Official record
Conditions
Tuberculosis, Vitamin D, Immunity
Interventions
Vitamin D (600 IU), Vitamin D (2000 IU), Vitamin D (4000 IU), Placebo
Dietary Supplement · Other
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 60 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Sep 9, 2020 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 2 Interventional Results available

Cholecalciferol and Genistein Before Surgery in Treating Patients With Early Stage Prostate Cancer

NCT01325311
View directory record Official record
Conditions
Prostate Adenocarcinoma, Stage I Prostate Cancer, Stage IIA Prostate Cancer, Stage IIB Prostate Cancer
Interventions
Cholecalciferol, Genistein, Laboratory Biomarker Analysis, Pharmacological Study, Placebo
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Male only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
11
States / cities
Birmingham, Alabama • Baltimore, Maryland • Burlington, Massachusetts + 6 more
Source: ClinicalTrials.gov public record
Updated Aug 3, 2016 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 2 Interventional Results available

Treatment of Hypoparathyroidism With Synthetic Human Parathyroid Hormone 1-34

NCT00001304
View directory record Official record
Conditions
Hypoparathyroidism
Interventions
Synthetic Human Parathyroid Hormone 1-34, Calcitriol & Calcium
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
17 Years to 69 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1991 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2015 · Synced Oct 14, 2026, 7:26 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Effects of Omega-3 Fatty Acids on Bone and Frailty

NCT00634686
View directory record Official record
Conditions
Osteoporosis, Frailty
Interventions
DHA/EPA, Placebo capsule, Calcium with vitamin D
Dietary Supplement
Lead sponsor
Donaghue Medical Research Foundation
Other
Eligibility
65 Years and older · Female only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 2, 2009 · Synced Oct 14, 2026, 7:26 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Prediabetes, Prehypertension and Vitamin D Supplementation - A Practice Based Clinical Intervention Pilot Study

NCT01425424
View directory record Official record
Conditions
Prediabetes, Prehypertension
Interventions
Vitamin D supplementation
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
7
States / cities
Baton Rouge, Louisiana • Covington, Louisiana • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 18, 2015 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Not applicable Interventional Results available

Vitamin D Supplementation in Kidney Disease

NCT01229878
View directory record Official record
Conditions
Renal Dialysis, Vitamin D Deficiency
Interventions
Cholecalciferol (Vitamin D)
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
45 Years to 89 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2022
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Aug 22, 2025 · Synced Oct 14, 2026, 7:26 PM EDT
Active, not recruiting Not applicable Interventional

Dried Plums and Bone Health in Postmenopausal Women

NCT02822378
View directory record Official record
Conditions
Postmenopausal Osteoporosis
Interventions
Dried Plum, Calcium supplement, Vitamin D supplement
Dietary Supplement
Lead sponsor
Penn State University
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
322 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2027
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 2Phase 3 Interventional

The Effect of Vitamin D and Calcium on Bone in Pediatric HIV

NCT00724178
View directory record Official record
Conditions
HIV Infection, Bone Mass
Interventions
cholecalciferol plus calcium carbonate
Dietary Supplement
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
6 Years to 16 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 15, 2010 · Synced Oct 14, 2026, 7:26 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 19, 2026 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Interaction Between Calcium and Vitamin D Intake

NCT00762775
View directory record Official record
Conditions
Osteoporosis
Interventions
Calcium and vitamin D supplementation
Dietary Supplement
Lead sponsor
Winthrop University Hospital
Other
Eligibility
45 Years to 85 Years · Female only
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Dec 11, 2014 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 4 Interventional Results available

Evaluation of the Effectiveness of Paricalcitol Versus Cinacalcet With Low-Dose Vitamin D

NCT00977080
View directory record Official record
Conditions
Chronic Kidney Disease, Secondary Hyperparathyroidism, Hemodialysis
Interventions
Paricalcitol, Cinacalcet
Drug
Lead sponsor
Abbott
Industry
Eligibility
18 Years and older
Enrollment
272 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
30
States / cities
Tempe, Arizona • Chula Vista, California • Los Angeles, California + 22 more
Source: ClinicalTrials.gov public record
Updated Jun 20, 2012 · Synced Oct 14, 2026, 7:26 PM EDT
Completed Phase 3 Interventional Results available

Double-blind Extension of HORIZON Pivotal Fracture Trial (Zoledronic Acid in the Treatment of Postmenopausal Osteoporosis)

NCT00145327
View directory record Official record
Conditions
Osteoporosis
Interventions
Zoledronic Acid, Placebo
Drug
Lead sponsor
Novartis
Industry
Eligibility
68 Years to 90 Years · Female only
Enrollment
2,456 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
30
States / cities
Tucson, Arizona • Little Rock, Arkansas • Beverly Hills, California + 26 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2011 · Synced Oct 14, 2026, 7:26 PM EDT