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ClinicalTrials.gov public records Last synced Oct 16, 2026, 10:21 AM EDT

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Showing 673–696 of 960 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: cholecalciferol (vitamin D) Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Establishing the Vitamin D Requirements During Lactation

NCT00412074
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
400 IU Vitamin D3 (cholecalciferol), 2400 IU Vitamin D3 (cholecalciferol), 6400 IU Vitamin D3 (cholecalciferol)
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
460 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
2
States / cities
Rochester, New York • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 4, 2018 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 1 Interventional

Pharmacokinetics and Safety Pilot Study of Single-Dose Oral and Intravenous CTAP101 in Stage 3 and 4 Chronic Kidney Disease Subjects

NCT00888069
View directory record Official record
Conditions
Chronic Kidney Disease, Secondary Hyperparathyroidism, Chronic Renal Insufficiency, Chronic Renal Failure
Interventions
CTAP101 Capsules, CTAP101 Injection
Drug
Lead sponsor
OPKO IP Holdings II, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
12
States / cities
Peoria, Arizona • Evergreen Park, Illinois • Springfield, Massachusetts + 9 more
Source: ClinicalTrials.gov public record
Updated Sep 30, 2014 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 2 Interventional Results available

Randomized Controlled Trial of Calcitriol vs. Placebo Among Critically-ill Patients With Sepsis

NCT01689441
View directory record Official record
Conditions
Severe Sepsis or Septic Shock
Interventions
Calcitriol, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 10, 2020 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Vitamin D Supplementation and Physical Function in Older Adults

NCT01179503
View directory record Official record
Conditions
Physical Function, Vitamin D Insufficiency
Interventions
calcium, Vitamin D plus calcium
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
70 Years to 89 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 17, 2018 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy of a Once Daily Calcium and Vitamin D Fortified Food Product to Improve Bone Microarchitecture

NCT02375503
View directory record Official record
Conditions
Bone Alteration, Dietary Modification
Interventions
Calcium/Vitamin D, Placebo
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 42 Years
Enrollment
175 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated May 15, 2017 · Synced Oct 16, 2026, 10:21 AM EDT
Withdrawn Phase 2 Interventional

Vitamin D Deficiency Causes Immune Dysfunction and Enables or Perpetuates the Development of Rheumatoid Arthritis

NCT00279461
View directory record Official record
Conditions
Arthritis, Rheumatoid, Vitamin D Deficiency
Interventions
Placebo in arm A and Vitamin D in arm B, vitamin D 3 for arm A ,and matching placebo for arm B
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 4, 2015 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 1 Interventional

Ultra-high Dose Vitamin D for HSCT

NCT03759262
View directory record Official record
Conditions
Hematopoietic Stem Cell Transplant
Interventions
Cholecalciferol
Drug
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
0 Years to 25 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 4 Interventional Results available

A Study of Bonviva (Ibandronate) in Women With Post-Menopausal Osteoporosis Who Have Received Previous Bonviva Treatment

NCT00551174
View directory record Official record
Conditions
Post-Menopausal Osteoporosis
Interventions
ibandronate [Bonviva/Boniva]
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
Female only
Enrollment
781 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
6
States / cities
Gainesville, Georgia • St Louis, Missouri • Omaha, Nebraska + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2011 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

"Clinical Trial to Determine the Efficacy of Vitamin D for Acne Therapy"

NCT01694433
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Calcipotriene, Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 7, 2019 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Vitamin D Supplementation in Breastfeeding Women

NCT01240265
View directory record Official record
Conditions
Vitamin D Deficiency, Rickets, Infant Nutrition Disorders
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
1 Month to 50 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 30, 2013 · Synced Oct 16, 2026, 10:21 AM EDT
Terminated Not applicable Interventional Results available

Study of Adults With Low Growth Hormone Who Survived Childhood Cancer Where Treatment Caused Low Bone Density

NCT00145704
View directory record Official record
Conditions
Osteopenia
Interventions
bisphosphonate therapy (risedronate), Vitamin D supplement, Calcium
Drug · Dietary Supplement
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2008
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2013 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Not applicable Interventional Results available

A Trial of Vitamin D Therapy in Patients With Heart Failure

NCT01125436
View directory record Official record
Conditions
Heart Failure
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
Case Western Reserve University
Other
Eligibility
50 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 10, 2022 · Synced Oct 16, 2026, 10:21 AM EDT
Recruiting Phase 2 Interventional

Assessment of Medrol Dosepak to Reduce Opioid Consumption in Foot and Ankle Surgical Patients

NCT06780202
View directory record Official record
Conditions
Foot Injuries and Disorders, Ankle Injuries and Disorders, Achilles Tendon Injury
Interventions
medrol dosepak, HYDROcodone Oral Tablet
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 95 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
Atlanta, Georgia • Johns Creek, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluate Effects of Sprinkled Format REDUCOSE in a Carbohydrate-rich, Mixed Meal on Post-prandial Glycemia

NCT04877366
View directory record Official record
Conditions
Dietary Supplement
Interventions
Dietary Supplement: Sprinkled Format REDUCOSE., Reference control, Active comparator
Dietary Supplement · Other
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
19 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Tustin, California
Source: ClinicalTrials.gov public record
Updated Oct 15, 2024 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 2 Interventional

Herbal Therapy for Treatment of Recurrent Prostate Cancer

NCT00669656
View directory record Official record
Conditions
Prostate Cancer
Interventions
Prostate Health Cocktail
Drug
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older · Male only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 20, 2017 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study

NCT03070483
View directory record Official record
Conditions
Hypertension, Vitamin D Deficiency
Interventions
Cholecalciferol
Drug
Lead sponsor
Loyola University
Other
Eligibility
25 Years to 45 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 24, 2020 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

A Prospective Trial on the Effects of Vitamin D Supplementation in Collegiate Swimmers and Divers

NCT01488227
View directory record Official record
Conditions
Healthy
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
University of Kentucky
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 25, 2013 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 1 Interventional

Trial of Combination Therapy to Treat COVID-19 Infection

NCT04482686
View directory record Official record
Conditions
COVID, Covid-19, Corona Virus Infection, Coronavirus Infection, Coronavirus-19, SARS-CoV2, SARS-CoV Infection
Interventions
Ivermectin, Doxycycline Hcl, Zinc, Vitamin D3, Vitamin C
Drug · Dietary Supplement
Lead sponsor
ProgenaBiome
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Can Vitamin D Reduce the Burden of COVID-19?

NCT07128069
View directory record Official record
Conditions
COVID-19
Interventions
Vitamin D 400IU, Vitamin D 4000IU
Dietary Supplement
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
2,093 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Phase 2 Interventional Results available

Adding Phosphorus to Osteoporosis Drug Treatment

NCT00074711
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Calcium carbonate, Calcium Phosphate
Drug
Lead sponsor
Creighton University
Other
Eligibility
60 Years to 85 Years · Female only
Enrollment
241 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 6, 2016 · Synced Oct 16, 2026, 10:21 AM EDT
Terminated Not applicable Interventional

PK/PD of Vitamin D3 in Adults With CF

NCT03734744
View directory record Official record
Conditions
Vitamin D Deficiency, Cystic Fibrosis
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 17, 2022 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Not applicable Interventional

African American Children, Glycemic Control, and Type 2 Diabetes

NCT01325987
View directory record Official record
Conditions
Type 2 Diabetes, Vitamin D Deficiency
Interventions
Vitamin D2, Sugar pill
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
12 Years to 18 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 20, 2014 · Synced Oct 16, 2026, 10:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Curves 30/30 Study

NCT04344821
View directory record Official record
Conditions
Weight Loss
Interventions
Curves Calcium, Placebo
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Apr 15, 2020 · Synced Oct 16, 2026, 10:21 AM EDT
Completed No phase listed Observational

Analysis of Hypovitaminosis D and Osteopenia/Osteoporosis in Spinal Disease Patients Who Underwent a Spinal Fusion at Illinois Neurological Institute, Peoria, IL., a Retrospective Review From November 1, 2012 to October 31, 2014 and Prospective Pilot From July 1, 2015-June 30, 2016

NCT02534714
View directory record Official record
Conditions
Hypovitaminosis D, Spinal Disease, Osteoporosis
Interventions
Not listed
Lead sponsor
OSF Healthcare System
Other
Eligibility
50 Years and older
Enrollment
460 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2015
U.S. locations
1
States / cities
Peoria, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 28, 2018 · Synced Oct 16, 2026, 10:21 AM EDT