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ClinicalTrials.gov public records Last synced Oct 6, 2026, 5:08 PM EDT

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Showing 25–48 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D3 (cholecalciferol) Clear all
Completed No phase listed Observational

Physiologic Regulation of FGF-23

NCT00356512
View directory record Official record
Conditions
Hypoparathyroidism
Interventions
Not listed
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
NIH
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2006
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Phase 2 Interventional Results available

Zoledronic Acid in Preventing Osteoporosis in Patients Undergoing Donor Stem Cell Transplant

NCT00321932
View directory record Official record
Conditions
Leukemia, Lymphoma, Myelodysplastic Syndromes, Osteoporosis, Ovarian Cancer
Interventions
calcium, cholecalciferol, zoledronic acid
Dietary Supplement · Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
2
States / cities
Minneapolis, Minnesota • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 9, 2017 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Not applicable Interventional

Correction of Vitamin D Inadequacy in Nursing Home Residents

NCT00204906
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
vitamin D supplementation
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 5, 2015 · Synced Oct 6, 2026, 5:08 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

One Week Comparison Study of PTH and PTHrP Infusions

NCT01333267
View directory record Official record
Conditions
Osteoporosis, Hypercalcemia of Malignancy, Hyperparathyroidism, Bone Diseases, Endocrine
Interventions
Parathyroid Hormone-related Protein (1-36), parathyroid hormone (1-34), PTH (1-34) and PTHrP (1-36)
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
24 Years to 35 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 5, 2014 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Not applicable Interventional

Effectiveness of High Dose Vitamin D Supplementation in Stage III Colorectal Cancer

NCT02603757
View directory record Official record
Conditions
Colon Cancer, Rectal Cancer
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Legacy Health System
Other
Eligibility
18 Years to 99 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
3
States / cities
Gresham, Oregon • Portland, Oregon • Tualatin, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 1, 2020 · Synced Oct 6, 2026, 5:08 PM EDT
Withdrawn Phase 1Phase 2 Interventional

High Dose Cholecalciferol to Reduce the Incidence of Gestational Diabetes in High Risk Pregnant Women

NCT03037593
View directory record Official record
Conditions
Gestational Diabetes
Interventions
4000 IU vitamin D3
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 1, 2019 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Phase 4 Interventional

A Trial Evaluating Vitamin D Normalization on Major Adverse Cardiovascular-Related Events Among Myocardial Infarction Patients

NCT02996721
View directory record Official record
Conditions
Death, Myocardial Infarction, Cerebral Vascular Accident, Heart Failure Hospitalization
Interventions
Vitamin D3
Biological
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
634 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Oct 6, 2026, 5:08 PM EDT
Withdrawn Phase 2Phase 3 Interventional

Vitamin D + Telaprevir + Peginterferon + Ribavirin for of Hepatitis C Genotype 1

NCT01890772
View directory record Official record
Conditions
Hepatitis C
Interventions
Telaprevir, Peginterferon alfa-2a, Ribavirin, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Timothy Morgan, MD
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2013
U.S. locations
4
States / cities
Long Beach, California • Minneapolis, Minnesota • Kansas City, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated May 14, 2014 · Synced Oct 6, 2026, 5:08 PM EDT
Active, not recruiting Phase 2Phase 3 Interventional

Setrusumab vs Placebo for Osteogenesis Imperfecta

NCT05125809
View directory record Official record
Conditions
Osteogenesis Imperfecta
Interventions
Setrusumab, Placebo
Biological · Other
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
5 Years to 25 Years
Enrollment
183 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
22
States / cities
Little Rock, Arkansas • Los Angeles, California • Sacramento, California + 19 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2026 · Synced Oct 6, 2026, 5:08 PM 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 6, 2026, 5:08 PM EDT
Completed Phase 2 Interventional Results available

A Study of Oral Recombinant Salmon Calcitonin (rsCT) to Prevent Postmenopausal Osteoporosis

NCT01292187
View directory record Official record
Conditions
Osteopenia
Interventions
Oral calcitonin at dinnertime, Oral placebo at dinnertime, Oral calcitonin at bedtime, Oral placebo at bedtime
Drug
Lead sponsor
Tarsa Therapeutics, Inc.
Industry
Eligibility
45 Years and older · Female only
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
10
States / cities
Walnut Creek, California • Clearwater, Florida • Bethesda, Maryland + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 12, 2014 · Synced Oct 6, 2026, 5:08 PM EDT
Terminated Phase 4 Interventional Results available

Effect of Vitamin D Supplementation on Balance in CKD

NCT03710161
View directory record Official record
Conditions
Renal Insufficiency, Chronic, Kidney Failure, Chronic
Interventions
Vitamin D
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
21 Years to 70 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 1, 2023 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Phase 3 Interventional Results available

Study of the Effect of Vitamin D as an Add-on Therapy to Corticosteroids in Asthma

NCT01248065
View directory record Official record
Conditions
Asthma
Interventions
Vitamin D3, Ciclesonide
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older
Enrollment
408 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
16
States / cities
San Francisco, California • Denver, Colorado • Atlanta, Georgia + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2014 · Synced Oct 6, 2026, 5:08 PM EDT
Recruiting Not applicable Interventional

Maternal Stress on Human Milk and Infant Outcomes

NCT04821544
View directory record Official record
Conditions
Postpartum Depression, Preterm Labor
Interventions
Mindfulness-based intervention (with a focus on self-compassion; MBSC), Vitamin D
Behavioral · Dietary Supplement
Lead sponsor
University of Idaho
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Coeur d'Alene, Idaho
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 6, 2026, 5:08 PM EDT
Completed No phase listed Observational Results available

Vitamin D and Screening Colonoscopy or Polyp Surveillance

NCT02269332
View directory record Official record
Conditions
Colon Cancer
Interventions
Screening Colonoscopy
Other
Lead sponsor
Mike O'Callaghan Military Hospital
Federal
Eligibility
18 Years and older
Enrollment
298 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jan 22, 2024 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Hypovitaminosis D in Neurocritical Patients

NCT02881957
View directory record Official record
Conditions
Craniocerebral Trauma, Intracranial Aneurysm, Brain Neoplasms, Spinal Cord Injuries, Seizures, Meningitis, Stroke, Intracranial Hemorrhages, Critical Illness, Vitamin d Deficiency
Interventions
Cholecalciferol, Placebo
Drug · Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
274 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 15, 2022 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Phase 3 Interventional Results available

Heartland Osteoporosis Prevention Study

NCT02186600
View directory record Official record
Conditions
Osteopenia
Interventions
Calcium Carbonate, Vitamin D3, Risedronate, Bone-loading exercises
Drug · Behavioral
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older · Female only
Enrollment
276 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Oct 6, 2026, 5:08 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Prebiotics (Dried Plum) and Immune Function in Postmenopausal Women

NCT07222111
View directory record Official record
Conditions
T Cell Response to Dried Plum, Vitamin D Influence on Immune Response, Dried Plum and Immune Function
Interventions
Dried plums
Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
60 Years to 75 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Oct 6, 2026, 5:08 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 6, 2026, 5:08 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers

NCT01105689
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Months to 3 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 9, 2011 · Synced Oct 6, 2026, 5:08 PM 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 6, 2026, 5:08 PM EDT
Completed Not applicable Interventional

Vitamin D, Cardiovascular Disease, and African Americans

NCT01655810
View directory record Official record
Conditions
Vitamin D Deficiency, Type 2 Diabetes Mellitus, Cardiovascular Disease
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years to 70 Years
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 5, 2020 · Synced Oct 6, 2026, 5:08 PM EDT
Completed Not applicable Interventional Results available

Therapeutic Diets in Alzheimer's Disease

NCT03860792
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Ketogenic Diet, Therapeutic Lifestyles Changes Diet
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
50 Years to 90 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Fairway, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Oct 6, 2026, 5:08 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Vitamin D and Glucose Metabolism in Pediatrics

NCT01386736
View directory record Official record
Conditions
Insulin Resistance, Obesity, Vitamin D25 Insufficiency
Interventions
Vitamin D drops, Placebo drops
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
7 Years to 18 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 1, 2011 · Synced Oct 6, 2026, 5:08 PM EDT