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ClinicalTrials.gov public records Last synced Oct 13, 2026, 11:09 AM EDT

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Showing 121–144 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: cholecalciferol (vitamin D) Clear all
Completed Phase 2 Interventional Results available

Effect of Alendronate on Bone in People With Chronic Spinal Cord Injury (SCI) Previously Treated With Teriparatide

NCT02195895
View directory record Official record
Conditions
Spinal Cord Injury, Bone Loss, Osteoporosis
Interventions
Alendronate, Calcium, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Northwestern University
Other
Eligibility
21 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 30, 2023 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 1 Interventional

A Pilot Study of Vitamin D in Boys With X-linked Adrenoleukodystrophy

NCT02595489
View directory record Official record
Conditions
X-linked Adrenoleukodystrophy
Interventions
vitamin D3
Dietary Supplement
Lead sponsor
Stanford University
Other
Eligibility
18 Months to 25 Years · Male only
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Jun 9, 2022 · Synced Oct 13, 2026, 11:09 AM EDT
Not listed No phase listed Observational

Vitamin D and Human Sperm DNA Fragmentation

NCT03829943
View directory record Official record
Conditions
Infertility,Male, Vitamin D Deficiency
Interventions
Vitamin D
Diagnostic Test
Lead sponsor
Sanford Health
Other
Eligibility
21 Years to 56 Years · Male only
Enrollment
230 participants
Timeline
2019 – 2022
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Oct 12, 2020 · Synced Oct 13, 2026, 11:09 AM EDT
Terminated Phase 4 Interventional Results available

Management of Mineral and Bone Disease in Hemodialysis-Calcitriol vs. Paricalcitol

NCT01725113
View directory record Official record
Conditions
Kidney Failure, Secondary Hyperparathyroidism, Hyperphosphatemia, Hypercalcemia
Interventions
Calcitriol, Paricalcitol
Drug
Lead sponsor
Winthrop University Hospital
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Nov 7, 2023 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Role of Vitamin D in Female Reproductive Tract Immunity

NCT02186535
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 8, 2016 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation

NCT00690417
View directory record Official record
Conditions
Vitamin D Insufficiency, Vitamin D Deficiency
Interventions
Cholecalciferol (vitamin D3)
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years and older · Female only
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 24, 2011 · Synced Oct 13, 2026, 11:09 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Vitamin D Status, Disease Specific and Quality of Life Outcomes in Patients With Cutaneous Lupus

NCT01498406
View directory record Official record
Conditions
Cutaneous Lupus Erythematosus
Interventions
vitamin D
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2013 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 2 Interventional Results available

Study Evaluating Changes In Bone Mineral Density (BMD), And Safety Of Rhbmp-2/CPM In Subjects With Decreased BMD

NCT00752557
View directory record Official record
Conditions
Osteoporosis
Interventions
rhBMP-2/CPM injection and bisphosphonates, calcium, and vitamin D (oral bisphosphonate therapy), bisphosphonates, calcium, and vitamin D
Drug
Lead sponsor
Pfizer
Industry
Eligibility
65 Years to 85 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2015
U.S. locations
28
States / cities
Phoenix, Arizona • Tucson, Arizona • Sacramento, California + 15 more
Source: ClinicalTrials.gov public record
Updated Mar 20, 2020 · Synced Oct 13, 2026, 11:09 AM EDT
Not listed Not applicable Interventional

Combined Effects of Diabetes Self-Management Education and Nutritional Supplementation on Visual Function and Retinopathy

NCT04120077
View directory record Official record
Conditions
Diabetes Mellitus, Diabetic Retinopathy
Interventions
EyePromise DVS, EyePromise DVS plus EyePromise EZTears
Dietary Supplement
Lead sponsor
ZeaVision, LLC
Industry
Eligibility
18 Years to 85 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 23, 2021 · Synced Oct 13, 2026, 11:09 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Fatty Acids on Infectious Diseases and hCAP18 (VITAL Infection)

NCT01758081
View directory record Official record
Conditions
Infections, Human Cathelicidin Antimicrobial Peptide (hCAP-18)
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,874 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Does Treatment of Hypovitaminosis D Increase Calcium Absorption?

NCT00581828
View directory record Official record
Conditions
Osteoporosis, Osteopenia, Vitamin D Deficiency, Hypoparathyroidism, Hypercalciuria, Hypercalcemia
Interventions
Vitamin D
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years to 66 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Oct 13, 2026, 11:09 AM EDT
Terminated Phase 1 Interventional

Calcitriol, Cisplatin, and Gemcitabine Hydrochloride in Treating Patients With Advanced Solid Tumors That Cannot Be Removed by Surgery

NCT01093092
View directory record Official record
Conditions
Adult Solid Neoplasm
Interventions
Calcitriol, Cisplatin, Gemcitabine Hydrochloride, Pharmacological Study
Dietary Supplement · Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Buffalo, New York • Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 12, 2016 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Vitamin D for Established Type 2 Diabetes (DDM2)

NCT01736865
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Cholecalciferol, Placebo
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
25 Years to 75 Years
Enrollment
127 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Boston, Massachusetts • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 1, 2020 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Not applicable Interventional

Vitamin D Replacement Using Oral Thin Film (OTF) Cholecalciferol in Patients Undergoing Hematopoietic Stem Cell Transplantation

NCT04818957
View directory record Official record
Conditions
Vitamin D Deficiency, Hematopoietic Stem Cell Transplantation (HSCT)
Interventions
Oral Thin Film (OTF) Cholecalciferol (Vitamin D3)
Dietary Supplement
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 4 Interventional

Pharmacokinetic Comparison of Vitamin's D2 and D3 in Stage 5 Chronic Kidney Disease Patients on Chronic Hemodialysis

NCT01675557
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Vitamin D3, Vitamin D2, Placebo
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
20 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Feb 26, 2015 · Synced Oct 13, 2026, 11:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Skeletal Health in Bariatric Surgery Patients

NCT03331536
View directory record Official record
Conditions
Bariatric Surgery, Osteoporosis, Fractures, Bone, Roux En-Y Gastric Bypass, Sleeve Gastrectomy, Menopause, Premenopause
Interventions
Roux en Y Gastric Bypass Pre-menopausal, Roux en Y Gastric Bypass Post-menopausal, Sleeve Gastrectomy Pre-menopausal, Sleeve Gastrectomy Post-menopausal
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older · Female only
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 2 Interventional Results available

Alii Supplement Study

NCT07271316
View directory record Official record
Conditions
Nutrient Deficiency, Happiness, Digestive Health, Vulnerability to Disease, Mood Swings, Energy
Interventions
Alii Supplement
Dietary Supplement
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children

NCT01050387
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
6 Months to 6 Years
Enrollment
193 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 5, 2014 · Synced Oct 13, 2026, 11:09 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 13, 2026, 11:09 AM 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 13, 2026, 11:09 AM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy Trial With Zoledronic Acid for the Treatment of Paget's Disease of Bone, Including an Extended Observation Period

NCT00103740
View directory record Official record
Conditions
Paget's Disease of Bone
Interventions
zoledronic acid, placebo to zoledronic acid, Risedronate, Placebo to risedronate, Calcium and vitamin D supplements
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
30 Years and older
Enrollment
185 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2011
U.S. locations
10
States / cities
Tucson, Arizona • Colorado Springs, Colorado • Indianapolis, Indiana + 7 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2012 · Synced Oct 13, 2026, 11:09 AM EDT
Suspended Phase 2 Interventional

Vitamin D Supplementation on Reported Rates of Taxane-Induced Neuropathy

NCT05259527
View directory record Official record
Conditions
Neuropathic Pain
Interventions
Ergocalciferol Capsules, Cholecalciferol Capsules
Drug · Dietary Supplement
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise

NCT02485197
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
7 continuous days of aerobic training
Other
Lead sponsor
David Travis Thomas
Other
Eligibility
65 Years to 75 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Mar 17, 2017 · Synced Oct 13, 2026, 11:09 AM EDT
Completed Phase 4 Interventional

Study to Evaluate the Effects of Zemplar Injection and Calcijex on Intestinal Absorption of Calcium

NCT00073710
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Zemplar, 42 Ca carbonate absorption via single tracer method, Calcijex
Drug · Procedure
Lead sponsor
Abbott
Industry
Eligibility
20 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 2, 2006 · Synced Oct 13, 2026, 11:09 AM EDT