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ClinicalTrials.gov public records Last synced Oct 14, 2026, 9:56 AM EDT

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Showing 217–240 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D (cholecalciferol) Clear all
Terminated No phase listed Observational

Effect of Vitamin D Supplementation on In-vitro Fertilization (IVF) Outcomes

NCT01419743
View directory record Official record
Conditions
Infertility, Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 38 Years · Female only
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
3
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 19, 2014 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 2 Interventional

A Phase 2 Study of an Oral Vitamin D Compound (DP001) in Secondary Hyperparathyroidism in Patients on Hemodialysis

NCT01922843
View directory record Official record
Conditions
Hyperparathyroidism, Secondary, Kidney Failure, Chronic
Interventions
DP001 softgel capsules, Placebo
Drug
Lead sponsor
Deltanoid Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
14
States / cities
Phoenix, Arizona • Tucson, Arizona • Washington D.C., District of Columbia + 11 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2017 · Synced Oct 14, 2026, 9:56 AM EDT
Withdrawn Phase 4 Interventional

Vitamin D and Carboxy PTH Fragments in Coronary Calcification

NCT00502268
View directory record Official record
Conditions
Coronary Calcification, Endstage Renal Disease, Parathyroid Hormone
Interventions
Doxercalciferol administration, Doxercalciferol administered by 1-84-7-84
Drug
Lead sponsor
Southeast Renal Research Institute
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 23, 2020 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Pharmacokinetics of Vitamin D in Multiple Sclerosis and in Health

NCT01667796
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-remitting
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
2
States / cities
San Francisco, California • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 5, 2019 · Synced Oct 14, 2026, 9:56 AM EDT
Terminated Phase 2Phase 3 Interventional

Intervention Using Vitamin D for Elevated Urinary Albumin Treated With Losartan in Diabetes (IDEAL)

NCT02410005
View directory record Official record
Conditions
Diabetic Nephropathies
Interventions
Calcitriol, Losartan
Dietary Supplement · Drug
Lead sponsor
Weill Cornell Medical College in Qatar
Other
Eligibility
21 Years to 80 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 15, 2017 · Synced Oct 14, 2026, 9:56 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Effect of 1,25-dihydroxyvitamin D3, Treatment on Insulin Secretion and Muscle Strength in Pre-diabetic Persons

NCT04286529
View directory record Official record
Conditions
Pre-Diabetic
Interventions
Calcitriol capsules, Oral Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years to 45 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 18, 2022 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 3 Interventional Results available

MOBILE Study - A Study of Bonviva (Ibandronate) Regimens in Women With Post-Menopausal Osteoporosis

NCT00048061
View directory record Official record
Conditions
Post Menopausal Osteoporosis
Interventions
Ibandronate [Bonviva/Boniva], Calcium, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
55 Years to 80 Years · Female only
Enrollment
1,609 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
20
States / cities
Irvine, California • Loma Linda, California • Los Angeles, California + 17 more
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 4 Interventional Results available

Paricalcitol Versus Calcitriol for Efficacy and Safety in Stage 3/4 Chronic Kidney Disease (CKD) With Secondary Hyperparathyroidism (SHPT)

NCT00823303
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Paricalcitol, Calcitriol
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
4
States / cities
Chicago, Illinois • Evanston, Illinois • Detroit, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2014 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 3 Interventional Results available

Calcium and Vitamin D to Optimize Bone Mass in Boys With Risperidone-induced Hyperprolactinemia

NCT00799383
View directory record Official record
Conditions
Risperidone-induced Hyperprolactinemia
Interventions
Calcium and Vitamin D, Placebo
Drug · Other
Lead sponsor
Chadi A. Calarge
Other
Eligibility
5 Years to 17 Years · Male only
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 26, 2017 · Synced Oct 14, 2026, 9:56 AM EDT
Not listed Phase 4 Interventional

The Use of Teriparatide as an Adjunctive Therapy for the Treatment of Jones Fractures

NCT01173081
View directory record Official record
Conditions
Fractures
Interventions
Teriparatide, Placebo
Drug
Lead sponsor
Ohio Orthopedic Center of Excellence
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Upper Arlington, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 5, 2012 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Not applicable Interventional

Evaluating the Cost Effectiveness of STEADI

NCT05390736
View directory record Official record
Conditions
Accidental Fall
Interventions
Gait and balance assessment, Medication review, Comorbidity review, Fall history, Assessment of feet/footwear, Assessment of visual acuity, Home safety risk assessment, Vitamin D Deficiency
Behavioral
Lead sponsor
National Opinion Research Center
Other
Eligibility
65 Years and older
Enrollment
780 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 9, 2023 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 1 Interventional

Vitamin D Supplementation And Varicella Zoster Virus Vaccine Responsiveness In Older Long-Term Care Residents

NCT01262300
View directory record Official record
Conditions
Immunosenescence, Shingles
Interventions
Varicella Zoster Virus Vaccine (Zostavax)
Biological
Lead sponsor
University of Colorado, Denver
Other
Eligibility
60 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 25, 2021 · Synced Oct 14, 2026, 9:56 AM EDT
Terminated Phase 4 Interventional

Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D

NCT01312441
View directory record Official record
Conditions
Vitamin D Deficiency, Renal Failure Chronic Requiring Hemodialysis
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
Albany College of Pharmacy and Health Sciences
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
4
States / cities
Albany, New York • Clifton Park, New York • Saratoga Springs, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 14, 2016 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Not applicable Interventional Results available

Study of Protective Effects of Paricalcitol on Inner Layer of Vessels and Its Protective Effect on Inflammation

NCT00428246
View directory record Official record
Conditions
Chronic Kidney Disease, Endothelial Dysfunction, Inflammation, Hypertension
Interventions
paricalcitol, Placebo
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 3, 2009 · Synced Oct 14, 2026, 9:56 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 14, 2026, 9:56 AM EDT
Completed Phase 2 Interventional Results available

A SU2C Catalyst® Trial of a PD1 Inhibitor With or Without a Vitamin D Analog for the Maintenance of Pancreatic Cancer

NCT03331562
View directory record Official record
Conditions
Pancreatic Cancer, Pancreas Adenocarcinoma, Advanced Pancreatic Cancer, Metastatic Pancreatic Cancer, Metastatic Pancreatic Adenocarcinoma
Interventions
Pembrolizumab, paricalcitol, placebo
Drug
Lead sponsor
Translational Genomics Research Institute
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
6
States / cities
Scottsdale, Arizona • Duarte, California • Westwood, Kansas + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 27, 2022 · Synced Oct 14, 2026, 9:56 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Independent and Combined Effects of Resistance Exercise Training and β-hydroxy β-methylbutyrate Plus Vitamin D

NCT03848741
View directory record Official record
Conditions
Aging, Skeletal Muscle
Interventions
Non-Exercise Control, Resistance Exercise Training, Placebo, HMB+VitD
Behavioral · Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Oct 14, 2026, 9:56 AM EDT
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 14, 2026, 9:56 AM EDT
Withdrawn Phase 3 Interventional

Vitamin D Status in Patients With Severe Sepsis

NCT02684487
View directory record Official record
Conditions
Sepsis, Severe Sepsis, End Organ Damage, Multi Organ Failure
Interventions
vitamin D3, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 5, 2021 · Synced Oct 14, 2026, 9:56 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Efficacy Of Ergocalciferol In Adults According To BMI

NCT02435771
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Ergocalciferols
Drug
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 11, 2017 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 2 Interventional

Bone Response to Enzyme Replacement in Gaucher's Disease

NCT00001416
View directory record Official record
Conditions
Gaucher's Disease
Interventions
CEREDASE™
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1993 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 22, 2016 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Phase 2 Interventional

Vitamin D, Insulin Resistance and Inflammation in ESRD

NCT00656032
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
paricalcitol, cinacalcet
Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 11, 2012 · Synced Oct 14, 2026, 9:56 AM EDT
Completed Not applicable Interventional Results available

Improving Vitamin D Status In Cystic Fibrosis

NCT00450073
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ergocalciferol (vitamin D2), Sperti Del Sol Lamp, Vitamin D3
Drug · Device
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
18 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 21, 2014 · Synced Oct 14, 2026, 9:56 AM 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 14, 2026, 9:56 AM EDT