Search | Clinical Trials Finder

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Nov 15, 2026, 9:59 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 409–432 of 967 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 . Clear all

Conditions: Muscle Pain, Joint Pain
Interventions: Vitamin D3; Drug
Lead sponsor: HealthPartners Institute; Other
Eligibility: 18 Years and older · Female only
Enrollment: 116 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2015
U.S. locations: 1
States / cities: Minneapolis, Minnesota

Conditions: Vitamin D Deficiency
Interventions: Not listed
Lead sponsor: Hospital for Special Surgery, New York; Other
Eligibility: 40 Years and older
Enrollment: 219 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2014
U.S. locations: 1
States / cities: New York, New York

Conditions: Spinal Cord Injury
Interventions: Vitamin D and Calcium; Dietary Supplement
Lead sponsor: US Department of Veterans Affairs; Federal
Eligibility: 18 Years to 75 Years
Enrollment: 10 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: The Bronx, New York

Conditions: Premenstrual Syndrome
Interventions: Measures of calcium and bone turnover; Procedure
Lead sponsor: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK); NIH
Eligibility: 18 Years to 45 Years · Female only
Healthy volunteers: Accepts healthy volunteers
Timeline: 2000 – 2003
U.S. locations: 1
States / cities: New York, New York

Conditions: Secondary Hyperparathyroidism, Renal Failure, Chronic Renal Insufficiency
Interventions: Hectorol (doxercalciferol capsules), 0.5mcg; Drug
Lead sponsor: Genzyme, a Sanofi Company; Industry
Eligibility: 18 Years and older
Enrollment: 70 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2005 – 2007
U.S. locations: 17
States / cities: Phoenix, Arizona • Alhambra, California • Riverside, California + 14 more

Conditions: Aging Well
Interventions: Rejuvant, Placebo; Dietary Supplement
Lead sponsor: Ponce De Leon Health; Industry
Eligibility: 45 Years to 75 Years
Enrollment: 100 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2020 – 2022
U.S. locations: 1
States / cities: Indianapolis, Indiana

Conditions: Prostate Cancer
Interventions: calcitriol, zoledronic acid; Dietary Supplement · Drug
Lead sponsor: Memorial Sloan Kettering Cancer Center; Other
Eligibility: 18 Years and older · Male only
Healthy volunteers: Healthy volunteers not accepted
Timeline: 1999 – 2004
U.S. locations: 1
States / cities: New York, New York

Conditions: Prostate Cancer
Interventions: calcitriol, dexamethasone, protein expression analysis, laboratory biomarker analysis; Dietary Supplement · Drug · Genetic + 1 more
Lead sponsor: Roswell Park Cancer Institute; Other
Eligibility: Up to 120 Years · Male only
Enrollment: 18 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2010
U.S. locations: 1
States / cities: Buffalo, New York

Conditions: Osteoporosis
Interventions: Placebo, DP001; Drug
Lead sponsor: Deltanoid Pharmaceuticals; Industry
Eligibility: 55 Years to 80 Years · Female only
Enrollment: 157 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2007 – 2009
U.S. locations: 9
States / cities: Upland, California • Indianapolis, Indiana • Bethesda, Maryland + 6 more

Conditions: Prediabetes, Type 2 Diabetes (T2DM)
Interventions: Vitamin D (Cholecalciferol ), Placebo; Drug
Lead sponsor: Tufts Medical Center; Other
Eligibility: 30 Years to 74 Years
Enrollment: 100 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2031
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Asthma in the Elderly
Interventions: Vitamin D 2,000 I.U.; Dietary Supplement
Lead sponsor: Rohr and Columbo Asthma, Allergy and Immunology Specialists, P.C.; Other
Eligibility: 65 Years and older
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2013
U.S. locations: 1
States / cities: Bryn Mawr, Pennsylvania

Conditions: Vitamin D Deficiency
Interventions: Sun Exposure; Behavioral
Lead sponsor: Creighton University; Other
Eligibility: 19 Years to 50 Years
Enrollment: 6 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007
U.S. locations: 1
States / cities: Omaha, Nebraska

Conditions: Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Columbia University; Other
Eligibility: 5 Years to 11 Years
Enrollment: 6 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2019
U.S. locations: 1
States / cities: New York, New York

Conditions: Osteoporosis
Interventions: Small Particle Size Calcium Carbonate Supplement, Large Particle Size Calcium Carbonate Supplement, Vitamin D, Calcium Placebo; Dietary Supplement
Lead sponsor: Purdue University; Other
Eligibility: 12 Years to 14 Years · Female only
Enrollment: 55 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007
U.S. locations: 1
States / cities: West Lafayette, Indiana

Conditions: Type 1 Diabetes, Vitamin D Deficiency/Insufficiency
Interventions: Vitamin D; Dietary Supplement
Lead sponsor: Children's Hospital Los Angeles; Other
Eligibility: 13 Years to 21 Years
Enrollment: 26 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2014
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Cancer Cachexia, Vitamin D Deficiency
Interventions: Vitamin D, Placebo; Dietary Supplement
Lead sponsor: David Travis Thomas; Other
Eligibility: 45 Years to 75 Years
Enrollment: 1 participant
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018
U.S. locations: 1
States / cities: Lexington, Kentucky

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

Conditions: Prostate Cancer
Interventions: Vitamin D3, Placebo; Drug
Lead sponsor: VA Office of Research and Development; Federal
Eligibility: 19 Years to 90 Years · Male only
Enrollment: 130 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2020
U.S. locations: 2
States / cities: Charleston, South Carolina

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

Conditions: Stage, Colon Cancer, Stage I-III Colon Cancer, Stage IV Colon Cancer With Resectable Liver Metastases
Interventions: Vitamin D3, Placebo; Drug
Lead sponsor: Dana-Farber Cancer Institute; Other
Eligibility: 18 Years and older
Enrollment: 80 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2027
U.S. locations: 1
States / cities: Boston, Massachusetts

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

Conditions: Epilepsy, Bone Loss, Osteoporosis, Fractures
Interventions: Risedronate, Placebo + Calcium and Vitamin D; Drug
Lead sponsor: Boston VA Research Institute, Inc.; Other
Eligibility: 18 Years to 85 Years · Male only
Enrollment: 80 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2013
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Communication Research
Interventions: Exposure to conflicting health information, No exposure to conflicting health information; Other
Lead sponsor: University of Minnesota; Other
Eligibility: 18 Years and older
Enrollment: 6,046 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2020
U.S. locations: 1
States / cities: Chicago, Illinois

Conditions: Inflammatory Bowel Diseases, Ulcerative Colitis, Crohn Disease
Interventions: Vitamin D; Drug
Lead sponsor: Stanford University; Other
Eligibility: 18 Years and older
Enrollment: 48 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2023
U.S. locations: 1
States / cities: Stanford, California

Search by objective public record fields.

Vitamin D3 Effects on Musculoskeletal Symptoms With Use of Aromatase Inhibitors

Vitamin D and Functional Outcomes After Total Hip Arthroplasty (THA)

Vitamin D and Calcium Study

Altered Calcium and Vitamin D in PMDD or Severe PMS

Study of Safety and Efficacy of Doxercalciferol in Patients With Chronic Kidney Disease, Stage 3 or 4, and Secondary Hyperparathyroidism

Rejuvant™ Safety and Biomarker Study

Calcitriol and Zoledronate in Treating Patients With Progressive Prostate Cancer

Calcitriol and Dexamethasone in Treating Patients With Prostate Cancer That Did Not Respond to Hormone Therapy

Phase 2 Safety and Efficacy Study of a Vitamin D Compound (DP001) in Postmenopausal Women With Low Bone Mineral Density

Vitamin D and Type 2 Diabetes - Treat-To-Target

Asthma in the Elderly: The Role of Vitamin D

Sunlight Exposures Effect on Serum Vitamin D Levels

Efficacy of Vitamin D Supplementation in Obese Children

Effect of Calcium Supplement Particle Size and Vitamin D Supplement on Calcium Retention in Adolescent Girls

The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM

Vitamin D for Muscle Metabolic Function in Cancer Cachexia

EMT in Peritoneal Dialysis Patients

Vitamin D3 Supplementation for Low-Risk Prostate Cancer: A Randomized Trial

Herbal Therapy for Treatment of Recurrent Prostate Cancer

Vitamin D in Patients With Stage I-III Colon Cancer or Resectable Colon Cancer Liver Metastases

Prevention of Bone Loss After Pediatric Hematopoietic Cell Transplantation

Antiepileptic Drugs and Osteoporotic Prevention Trial

Effects of Prior Exposure to Conflicting Health Information on Responses to Subsequent Unrelated Health Messages

Vitamin D Regulation of Gut Specific B Cells and Antibodies Targeting Gut Bacteria in Inflammatory Bowel Disease