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ClinicalTrials.gov public records Last synced Oct 13, 2026, 12:45 PM EDT

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Showing 265–288 of 505 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamins A and D Clear all
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 13, 2026, 12:45 PM 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Withdrawn Phase 4 Interventional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 13, 2026, 12:45 PM EDT
Completed Phase 1 Interventional

Zoledronic Acid (ZOMETA) With Cyclophosphamide With Neuroblastoma and Cortical Bone Involvement

NCT00206388
View directory record Official record
Conditions
NEUROBLASTOMA
Interventions
Zolendric acid, Cyclophosphamide
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 30 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
8
States / cities
Los Angeles, California • San Francisco, California • Stanford, California + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 2, 2013 · Synced Oct 13, 2026, 12:45 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 13, 2026, 12:45 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Study of Changes in Bone Mineral Density as a Function of Consuming Two Different Forms of Calcium Carbonate

NCT01857154
View directory record Official record
Conditions
Osteopenia, Osteoporosis
Interventions
Micronized Calcium Carbonate, Non-Micronized Calcium Carbonate, Vitamin D3
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
21 Years and older
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Nov 25, 2013 · Synced Oct 13, 2026, 12:45 PM EDT
Terminated Not applicable Interventional Results available

Effects of Ergocalciferol on Erythropoetin Stimulating Agent Dose

NCT01263028
View directory record Official record
Conditions
Chronic Kidney Disease Stages 3-5
Interventions
Ergocalciferol supplementation
Drug
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 30, 2015 · Synced Oct 13, 2026, 12:45 PM EDT
Completed No phase listed Observational

EMT in Peritoneal Dialysis Patients

NCT03458819
View directory record Official record
Conditions
Peritoneal Dialysis Complication
Interventions
Isolation of peritoneal mesothelial cells
Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 90 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 25, 2021 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 2 Interventional Results available

Prevention of Bone Loss After Pediatric Hematopoietic Cell Transplantation

NCT02074631
View directory record Official record
Conditions
Osteopenia, Osteoporosis
Interventions
Pamidronate, Calcium and vitamin D
Drug
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
1 Year to 20 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
2
States / cities
Minneapolis, Minnesota • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 20, 2024 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Not applicable Interventional Results available

Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in Chronic Kidney Disease

NCT00285467
View directory record Official record
Conditions
Renal Osteodystrophy
Interventions
doxercalciferol, Cholecalciferol
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 82 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated May 2, 2016 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nutritional Intervention for Age-related Muscular Function and Strength Losses-Study 2

NCT02043171
View directory record Official record
Conditions
Sarcopenia
Interventions
Placebo, HMB plus Vitamin D, Non-Exercise, Exercise
Dietary Supplement · Drug · Behavioral
Lead sponsor
Metabolic Technologies Inc.
Industry
Eligibility
60 Years and older
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Ames, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 11, 2019 · Synced Oct 13, 2026, 12:45 PM EDT
Active, not recruiting Phase 4 Interventional

Novel Precision Medicine Approach to Treatment of Osteoporosis Based on Bone Turnover

NCT05151484
View directory record Official record
Conditions
Age-Related Osteoporosis
Interventions
Teriparatide, Alendronate
Drug
Lead sponsor
Madhumathi Rao
Other
Eligibility
40 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency

NCT01651000
View directory record Official record
Conditions
Chronic Kidney Disease, Hyperparathyroidism, Secondary, Vitamin D Deficiency
Interventions
CTAP101 30 μg capsules, Sugar pill to CTAP101 30 μg capsules
Drug · Other
Lead sponsor
OPKO IP Holdings II, Inc.
Industry
Eligibility
18 Years and older
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Bannockburn, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 3 Interventional Results available

Secondary Prevention of Osteoporosis

NCT00421343
View directory record Official record
Conditions
Osteoporosis
Interventions
alendronate with cholecalciferol, calcium carbonate with cholecalciferol, Falls prevention measures
Drug · Behavioral
Lead sponsor
Hebrew SeniorLife
Other
Eligibility
65 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 13, 2026, 12:45 PM 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 13, 2026, 12:45 PM EDT
Completed Phase 2 Interventional Results available

The Efficacy, Safety and Tolerability of Oral LPCN 1144 in Subjects With Nonalcoholic Steatohepatitis

NCT04134091
View directory record Official record
Conditions
Nonalcoholic Steatohepatitis (NASH)
Interventions
LPCN 1144 Formulation A, LPCN 1144 Formulation B, Placebo
Drug
Lead sponsor
Lipocine Inc.
Industry
Eligibility
18 Years to 80 Years · Male only
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
19
States / cities
El Cajon, California • Murrieta, California • Rialto, California + 14 more
Source: ClinicalTrials.gov public record
Updated Dec 14, 2023 · Synced Oct 13, 2026, 12:45 PM EDT
Active, not recruiting Not applicable Interventional

Randomized Trial of Enteral Vitamin D Supplementation in Infants < 28 Weeks Gestational Age or <1000 Grams Birth Weight

NCT05694689
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Placebo, 800 IU/day vitamin D supplementation with feedings in the first 28 days after birth, Usual Care
Dietary Supplement · Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
24 Hours to 96 Hours
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 4 Interventional

A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT

NCT03176849
View directory record Official record
Conditions
Vitamin D Deficiency, Stem Cell Transplant Complications, Pediatric Cancer, Blood Disorder, Pediatric Acute Myeloid Leukemia, Pediatric Acute Lymphoid Leukemia, Myelodysplastic Syndromes, Sickle Cell Anemia in Children, Aplastic Anemia, Thalassemia in Children
Interventions
Vitamin D3, Standard Vitamin D3 Supplementation
Dietary Supplement
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
1 Year to 25 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 17, 2020 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 1 Interventional

Safety and Immunologic Effect of Low Dose Versus High Dose Vitamin D3 in Multiple Sclerosis

NCT01024777
View directory record Official record
Conditions
Multiple Sclerosis, Vitamin D Deficiency
Interventions
Cholecalciferol
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 55 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 6, 2013 · Synced Oct 13, 2026, 12:45 PM EDT
Recruiting Not applicable Interventional

Vitamin D Effects on Immune Microenvironment of Nonmelanoma Skin Cancer After Photodynamic Therapy (PDT)

NCT07241585
View directory record Official record
Conditions
Nonmelanoma Skin Cancer, Basal Cell Carcinoma, Squamous Cell Carcinoma
Interventions
Vitamin D (VitD), Placebo, Photodynamic therapy (PDT), Mohs surgery or electrodessication & curettage (ED&C) (standard of care)
Dietary Supplement · Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Oct 13, 2026, 12:45 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Omega-3 Adiposity Trial (VITAL Adiposity)

NCT01785004
View directory record Official record
Conditions
Adiposity
Interventions
Vitamin D3 (cholecalciferol), 2000 IU per day, omega-3 fatty acids (fish oil)
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 13, 2021 · Synced Oct 13, 2026, 12:45 PM EDT
Withdrawn Not applicable Interventional

The Effects of Active VItamin D on Left Atrial Volume Index

NCT01630408
View directory record Official record
Conditions
Heart Failure
Interventions
Paricalcitol
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 16, 2013 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 1Phase 2 Interventional

Study of DN101 and Taxotere in Patients With Advanced Non-Small Cell Lung Cancer

NCT00066885
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
calcitriol + docetaxel
Drug
Lead sponsor
Novacea
Industry
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
11
States / cities
Berkeley, California • Vallejo, California • Denver, Colorado + 8 more
Source: ClinicalTrials.gov public record
Updated May 7, 2007 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation and Management of Metabolic Bone Disease in Kidney Transplant Recipients

NCT03958409
View directory record Official record
Conditions
Skeletal Anomalies, Kidney Transplant; Complications
Interventions
measurements to evaluate metabolic bone disease, standard care
Diagnostic Test
Lead sponsor
Yale University
Other
Eligibility
30 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 28, 2023 · Synced Oct 13, 2026, 12:45 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Vitamin D HIV Study on Postmenopausal Women

NCT01375010
View directory record Official record
Conditions
HIV
Interventions
Vitamin D3, Placebo, Vitamin Supplements
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2019 · Synced Oct 13, 2026, 12:45 PM EDT