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ClinicalTrials.gov public records Last synced Nov 15, 2026, 7:30 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

Showing 217–240 of 967 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 . Clear all

Conditions: Vitamin D Deficiency, Metabolic Syndrome, Prediabetes
Interventions: Mushroom with 600 IU vitamin D2, Mushroom with 4000 IU Vitamin D2, 600 IU Vitamin D3 and untreated mushroom, 4000 IU Vitamin D3 and untreated mushroom, Placebo; Dietary Supplement · Drug
Lead sponsor: Icahn School of Medicine at Mount Sinai; Other
Eligibility: 30 Years to 90 Years
Enrollment: 47 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2013
U.S. locations: 1
States / cities: New York, New York

Conditions: Hematopoietic Stem Cell Transplant
Interventions: Vitamin D and A, Vitamin D and Placebo; Dietary Supplement
Lead sponsor: Children's Hospital Medical Center, Cincinnati; Other
Eligibility: Not listed
Enrollment: 83 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2023
U.S. locations: 1
States / cities: Cincinnati, Ohio

Conditions: Coronary Artery Disease, Chronic Kidney Disease, Hypovitaminosis D, Secondary Hyperparathyroidism
Interventions: paricalcitol, placebo; Drug
Lead sponsor: Thomas Jefferson University; Other
Eligibility: 18 Years and older
Enrollment: 10 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: Philadelphia, Pennsylvania

Conditions: Male Infertility, Klinefelter's Syndrome, Y-chromosome Microdeletions
Interventions: 13-cis retinoic acid, Calcitriol; Drug
Lead sponsor: University of Washington; Other
Eligibility: 21 Years to 60 Years · Male only
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2018
U.S. locations: 1
States / cities: Seattle, Washington

Conditions: Androgen Independent Prostate Cancer (AIPC), Non Small Cell Lung Cancer (NSCLC)
Interventions: DN-101 (calcitriol) - Drug; Drug
Lead sponsor: Novacea; Industry
Eligibility: 18 Years and older
Enrollment: 25 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2008
U.S. locations: 11
States / cities: Berkeley, California • San Francisco, California • Vallejo, California + 6 more

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

Conditions: Vitamin D Deficiency, Obesity
Interventions: Not listed
Lead sponsor: University of Massachusetts, Worcester; Other
Eligibility: 3 Years to 12 Years
Enrollment: 45 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: Worcester, Massachusetts

Conditions: Obesity, Overweight
Interventions: Reduced energy (lite) OJ fortified with Calcium and Vitamin D, Nutrition Counseling, Reduced energy (lite) OJ without Calcium and Vitamin D; Dietary Supplement · Behavioral
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 18 Years to 65 Years
Enrollment: 83 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2006
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Osteoporosis, Cardiac Transplantation
Interventions: Alendronate, Calcitriol, Placebo Alendronate, Placebo Calcitriol; Drug
Lead sponsor: Columbia University; Other
Eligibility: 20 Years to 70 Years
Enrollment: 149 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 1997 – 2002
U.S. locations: 2
States / cities: New York, New York

Conditions: CKD Stage 3, CKD Stage 4, Secondary Hyperparathyroidism, VDI
Interventions: CTAP101; Drug
Lead sponsor: OPKO Health, Inc.; Industry
Eligibility: 1 Month to 17 Years
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 5
States / cities: Kansas City, Missouri • Columbus, Ohio • Philadelphia, Pennsylvania + 2 more

Conditions: HIV Infections
Interventions: Vitamin D supplement, Placebo; Dietary Supplement · Other
Lead sponsor: University of North Carolina, Chapel Hill; Other
Eligibility: 18 Years to 24 Years
Enrollment: 207 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2007 – 2010
U.S. locations: 14
States / cities: Los Angeles, California • San Francisco, California • Washington D.C., District of Columbia + 10 more

Conditions: Autism, Vitamin D Deficiency
Interventions: Liquid Vitamin D; Drug
Lead sponsor: University of California, San Francisco; Other
Eligibility: 3 Years to 8 Years
Enrollment: 10 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2015
U.S. locations: 1
States / cities: San Francisco, California

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

Conditions: Vitamin D Deficiency, End-stage Renal Disease
Interventions: Cholecalciferol; Drug
Lead sponsor: Mehrotra, Anita, M.D.; Individual
Eligibility: 18 Years and older
Enrollment: 116 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2013
U.S. locations: 1
States / cities: New York, New York

Conditions: Respiratory Infection
Interventions: Vitamin D3 (cholecalciferol), Placebo Sugar Pill; Dietary Supplement
Lead sponsor: University of Iowa; Other
Eligibility: 18 Years to 60 Years
Enrollment: 98 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2010
U.S. locations: 1
States / cities: Iowa City, Iowa

Conditions: Insulin Sensitivity
Interventions: Ergocalciferols, Placebo; Drug
Lead sponsor: Texas Tech University Health Sciences Center; Other
Eligibility: 18 Years to 60 Years
Enrollment: 12 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2012
U.S. locations: 1
States / cities: Odessa, Texas

Conditions: Prostatic Neoplasms, Prostate Cancer
Interventions: Calcitriol, Naproxen-n-butyl nitrate; Drug
Lead sponsor: Stanford University; Other
Eligibility: 18 Years to 90 Years · Male only
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2005 – 2007
U.S. locations: 1
States / cities: Stanford, California

Conditions: Leukemia, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Neoplasms
Interventions: cholecalciferol, arsenic trioxide; Dietary Supplement · Drug
Lead sponsor: Wake Forest University Health Sciences; Other
Eligibility: Up to 120 Years
Enrollment: 5 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2004 – 2010
U.S. locations: 1
States / cities: Winston-Salem, North Carolina

Conditions: Vitamin D Deficiency
Interventions: Cholecalciferol; Dietary Supplement
Lead sponsor: Augusta University; Other
Eligibility: 13 Years to 45 Years
Enrollment: 74 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2015
U.S. locations: 1
States / cities: Augusta, Georgia

Conditions: Vitamin D Deficiency
Interventions: Vitamin D; Dietary Supplement
Lead sponsor: Children's Hospital Medical Center, Cincinnati; Other
Eligibility: Not listed
Enrollment: 10 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2017
U.S. locations: 1
States / cities: Cincinnati, Ohio

Conditions: Spinal Cord Injury
Interventions: NMES, Vitamin D, Passive movement; Device · Drug · Behavioral
Lead sponsor: VA Office of Research and Development; Federal
Eligibility: 18 Years to 65 Years
Enrollment: 6 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2021 – 2024
U.S. locations: 1
States / cities: Richmond, Virginia

Conditions: Osteoporosis, Frailty
Interventions: DHA/EPA, Placebo capsule, Calcium with vitamin D; Dietary Supplement
Lead sponsor: Donaghue Medical Research Foundation; Other
Eligibility: 65 Years and older · Female only
Enrollment: 150 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2009
U.S. locations: 1
States / cities: Farmington, Connecticut

Conditions: Peyronie's Disease
Interventions: Vitamin D2, Vitamin E, Testosterone Pellets; Drug
Lead sponsor: Men's Health Boston; Other
Eligibility: 18 Years to 70 Years · Male only
Enrollment: 75 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2017
U.S. locations: 1
States / cities: Chestnut Hill, Massachusetts

Conditions: Overweight, Childhood Obesity
Interventions: Attention to BMI, Attention to high-BMI-related Medical Risk, No attention to high BMI or high-BMI-related medical risk; Other
Lead sponsor: University of Texas Southwestern Medical Center; Other
Eligibility: 6 Years to 12 Years
Enrollment: 7,192 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2015
U.S. locations: 1
States / cities: Dallas, Texas

Search by objective public record fields.

Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom

A Randomized Trial of Vitamin D Supplementation With or Without Vitamin A in Stem Cell Transplantation

Effect of Vitamin D Supplement on Inflammation Markers in High-Risk Cardiovascular Patients With Chronic Kidney Disease

RA-2 13-cis Retinoic Acid (Isotretinoin)

Study of DN-101 (Calcitriol) and Docetaxel in Subjects Previously Enrolled in Studies DN101-002 or DN101-004

Hypovitaminosis D in Neurocritical Patients

Vitamin D Deficiency and Low Bone Mineral Content in Children

Calcium Supplementation for a Healthy Weight-Lite (CaSHeW Lite)

Osteoporosis Prevention After Heart Transplant

Pharmacokinetics, Pharmacodynamics, Safety and Tolerability Evaluation of CTAP101 Extended-release Capsules in Pediatric Participants

Vitamin D Reabsorption in Adolescents and Young Adults With HIV Infection

Open Label Clinical Trial of Vitamin D in Children With Autism

Vitamin D HIV Study on Postmenopausal Women

Impact of Vitamin D Repletion in Hemodialysis Patients

Human Lung Responses to Respiratory Pathogens

Effect of Vitamin D Replacement on Insulin Sensitivity

A Phase II Trial of Calcitriol and Naproxen in Patients With Recurrent Prostate Cancer

Arsenic Trioxide and Cholecalciferol (Vitamin D) in Treating Patients With Myelodysplastic Syndromes

Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY)

High Dose Vitamin D Replacement in Patients Undergoing Hematopoietic Stem Cell Transplantation

Effects of Electrical Stimulation and Vitamin D Supplementation on Bone Health Following Spinal Cord Injury.

Effects of Omega-3 Fatty Acids on Bone and Frailty

Testosterone Pellets Plus Vitamin D and E Versus Vitamin D and E Alone for the Treatment of Peyronie's Disease

Primary Care Clinical Practice Elements and Improving Overweight Children's Weight Status