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 16, 2026, 11:02 AM EDT

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

Showing 745–768 of 960 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D (cholecalciferol) Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Calcium Supplement Particle Size and Vitamin D Supplement on Calcium Retention in Adolescent Girls

NCT01005381
View directory record Official record
Conditions
Osteoporosis
Interventions
Small Particle Size Calcium Carbonate Supplement, Large Particle Size Calcium Carbonate Supplement, Vitamin D, Calcium Placebo
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
12 Years to 14 Years · Female only
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 9, 2018 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional

Pamidronate, Vitamin D, and Calcium for the Bone Disease of Kidney and Heart Transplantation

NCT00302627
View directory record Official record
Conditions
Transplant Bone Disease
Interventions
Pamidronate, vitamin D, Calcium Carbonate
Drug
Lead sponsor
Providence Health & Services
Other
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated Aug 29, 2018 · Synced Oct 16, 2026, 11:02 AM EDT
Terminated Phase 1 Interventional

Topical Calcipotriene Treatment for Breast Cancer Immunoprevention

NCT03596073
View directory record Official record
Conditions
Breast Cancer
Interventions
Topical Calcipotriene Ointment, Topical Vaseline
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
50 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Oct 16, 2026, 11:02 AM EDT
Not listed Phase 2 Interventional

Study of DN-101 (Calcitriol) and Docetaxel in Subjects Previously Enrolled in Studies DN101-002 or DN101-004

NCT00285675
View directory record Official record
Conditions
Androgen Independent Prostate Cancer (AIPC), Non Small Cell Lung Cancer (NSCLC)
Interventions
DN-101 (calcitriol) - Drug
Drug
Lead sponsor
Novacea
Industry
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
11
States / cities
Berkeley, California • San Francisco, California • Vallejo, California + 6 more
Source: ClinicalTrials.gov public record
Updated May 31, 2006 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional Results available

The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates

NCT01691833
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
113 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 14, 2022 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer

NCT00416715
View directory record Official record
Conditions
Arthralgia, Musculoskeletal Complications, Pain, Recurrent Breast Cancer, Stage I Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer
Interventions
letrozole, calcium carbonate, laboratory biomarker analysis, calcium citrate, calcium glucarate, calcium gluconate, cholecalciferol, assessment of therapy complications, musculoskeletal complications management/prevention
Drug · Dietary Supplement · Other + 1 more
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 16, 2026, 11:02 AM EDT
Not yet recruiting Phase 2 Interventional

HMB Plus Vitamin D to Preserve Muscle in Older Adults Starting Semaglutide

NCT07760948
View directory record Official record
Conditions
Type 2 Diabetes Mellitus (T2DM), Sarcopenia, Obesity, Muscle Loss, Older Adults
Interventions
Calcium-HMB Plus Vitamin D3, Matching placebo
Dietary Supplement · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
65 Years to 85 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 16, 2026, 11:02 AM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Averting Complications of Proton Pump Inhibitor Therapy by Effervescent Calcium Magnesium Citrate

NCT03812380
View directory record Official record
Conditions
Osteoporosis, Hypomagnesemia
Interventions
EffCaMgCit, Placebo
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
21 Years to 99 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 17, 2022 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional

Vitamin D Effect on Calcium Absorption on Persons on Hemodialysis

NCT01325610
View directory record Official record
Conditions
Chronic Kidney Disease, End Stage Renal Disease, Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Apr 4, 2012 · Synced Oct 16, 2026, 11:02 AM EDT
Completed No phase listed Observational Results available

Vitamin D to Improve Outcomes by Leveraging Early Treatment: Long-term Brain Outcomes in Vitamin D Deficient Patients

NCT03733418
View directory record Official record
Conditions
Cognitive Decline
Interventions
540,000 IU vitamin D3, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
7
States / cities
Aurora, Colorado • Boston, Massachusetts • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2024 · Synced Oct 16, 2026, 11:02 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

PUSH Plus Protein Pilot for Hip Fracture Patients

NCT03410823
View directory record Official record
Conditions
Hip Fracture
Interventions
PUSH, Protein, Nutrition
Behavioral · Dietary Supplement
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
60 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
2
States / cities
Baltimore, Maryland • Towson, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 26, 2024 · Synced Oct 16, 2026, 11:02 AM EDT
Recruiting Early Phase 1 Interventional

Triamcinolone With Vitamin D Synergistic Efficacy in Psoriasis

NCT04036188
View directory record Official record
Conditions
Plaque Psoriasis, Vitamin D3
Interventions
Triamcinolone, Vitamin D3, Placebo
Drug · Dietary Supplement
Lead sponsor
Wright State University
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Fairborn, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Phase 1 Interventional

Calcitriol Plus Carboplatin in Treating Patients With Advanced Solid Tumors

NCT00008086
View directory record Official record
Conditions
Brain and Central Nervous System Tumors, Unspecified Adult Solid Tumor, Protocol Specific
Interventions
calcitriol, carboplatin
Dietary Supplement · Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2004
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 19, 2013 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Prior Exposure to Conflicting Health Information on Responses to Subsequent Unrelated Health Messages

NCT04247529
View directory record Official record
Conditions
Communication Research
Interventions
Exposure to conflicting health information, No exposure to conflicting health information
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
6,046 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 10, 2020 · Synced Oct 16, 2026, 11:02 AM EDT
Terminated Phase 2 Interventional Results available

Studies With 1,25-Dihydroxycholecalciferol

NCT00001151
View directory record Official record
Conditions
Hypocalcemia, Rickets
Interventions
1,25-Dihydroxycholecalciferol
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1976 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 25, 2013 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Older Women

NCT00472823
View directory record Official record
Conditions
Osteoporosis, Aging
Interventions
Vitamin D3, Calcium Citrate (Citracal)
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
57 Years and older · Female only
Enrollment
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 14, 2016 · Synced Oct 16, 2026, 11:02 AM EDT
Recruiting No phase listed Observational

Correlation Vitamin D Level to Endocrine Autoimmune Toxicity Due to Immune Checkpoint Inhibitors

NCT04615988
View directory record Official record
Conditions
Thyroid, PD-1, Cancer
Interventions
blood draw and questionnaire completion, questionnaire completion, blood collection
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional

Vitamin D for Improving Metabolic Control and Depressive Symptoms

NCT01185574
View directory record Official record
Conditions
Depressive Symptoms, Diabetes
Interventions
Vitamin D supplementation
Dietary Supplement
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 11, 2013 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes

NCT03134417
View directory record Official record
Conditions
Overweight and Obesity, Vitamin D Deficiency, Magnesium Deficiency, Cardiovascular Risk Factor
Interventions
Vitamin D and magnesium, Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Drexel University
Other
Eligibility
30 Years to 70 Years
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional

A Pilot Study of the Impact of Vitamin D3 on Muscle Performance in Elderly Women

NCT00986596
View directory record Official record
Conditions
Sarcopenia, Falls
Interventions
vitamin D3, Placebo
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
65 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 10, 2012 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Not applicable Interventional Results available

The VALIDATE-D Study

NCT01635062
View directory record Official record
Conditions
Type 2 Diabetes, Obesity
Interventions
Calcitriol, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 11, 2017 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Phase 2 Interventional Results available

Males, Antioxidants, and Infertility Trial

NCT02421887
View directory record Official record
Conditions
Male Infertility
Interventions
Antioxidant Supplement, Placebo
Drug · Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older · Male only
Enrollment
171 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
10
States / cities
Los Angeles, California • San Francisco, California • Sunnyvale, California + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 4, 2019 · Synced Oct 16, 2026, 11:02 AM EDT
Terminated No phase listed Observational Results available

Study to Evaluate Safety of Vitamin D Receptor Activators in Patients Ages 0 to 16 With Chronic Kidney Disease Stage 5 Receiving Peritoneal Dialysis Within Current Clinical Practice

NCT01134315
View directory record Official record
Conditions
Secondary Hyperparathyroidism, End-Stage Renal Disease
Interventions
Paricalcitol, Calcitriol
Drug
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
Up to 16 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
18
States / cities
Birmingham, Alabama • Gainesville, Florida • Orlando, Florida + 15 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2013 · Synced Oct 16, 2026, 11:02 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of a Meal on Vitamin D Absorption

NCT01268176
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 13, 2013 · Synced Oct 16, 2026, 11:02 AM EDT