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ClinicalTrials.gov public records Last synced Oct 11, 2026, 2:22 PM EDT

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Showing 145–168 of 188 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D - Treatment 2 Clear all
Active, not recruiting Phase 3 Interventional Results available

Vitamin D3 With Chemotherapy and Bevacizumab in Treating Patients With Advanced or Metastatic Colorectal Cancer

NCT04094688
View directory record Official record
Conditions
Colorectal Adenocarcinoma
Interventions
Bevacizumab, Oxaliplatin, Leucovorin Calcium, Fluorouracil, Irinotecan Hydrochloride, Irinotecan, Cholecalciferol, Quality-of-Life Assessment, Questionnaire Administration
Drug · Dietary Supplement · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older
Enrollment
455 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1027
States / cities
Birmingham, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 676 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Oct 11, 2026, 2:22 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Observational Study on the Use of Ivermectin as an Outpatient Treatment Option for COVID-19

NCT05045937
View directory record Official record
Conditions
Covid19, COVID-19 Pneumonia, COVID-19 Respiratory Infection, COVID-19 Acute Bronchitis
Interventions
Ivermectin
Drug
Lead sponsor
Patrick Robinson
Other
Eligibility
12 Years to 110 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
San Antonio, Florida
Source: ClinicalTrials.gov public record
Updated Apr 27, 2022 · Synced Oct 11, 2026, 2:22 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Calcitriol in Combination With Ketoconazole and Therapeutic Hydrocortisone in Treating Patients With Prostate Cancer

NCT00536991
View directory record Official record
Conditions
Prostate Adenocarcinoma, Recurrent Prostate Carcinoma, Stage III Prostate Cancer, Stage IV Prostate Cancer
Interventions
Calcitriol, Ketoconazole, Laboratory Biomarker Analysis, Pharmacological Study, Therapeutic Hydrocortisone
Dietary Supplement · Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Oct 11, 2026, 2:22 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Trifecta Research Study

NCT07717866
View directory record Official record
Conditions
PTSD - Post Traumatic Stress Disorder, Cognitive Dysfunction, Brain Injury, Depression - Major Depressive Disorder, Suicidal Ideation
Interventions
Magnetic e-Resonance Therapy (MeRT), Ibogaine Hydrochloride with Magnesium Sulfate, 5-methoxy-N,N-dimethyltryptamine, Physiological Supplementation
Device · Drug
Lead sponsor
Axial Therapeutic Research
Industry
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Northridge, California
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Oct 11, 2026, 2:22 PM EDT
Active, not recruiting Phase 2Phase 3 Interventional

Setrusumab vs Placebo for Osteogenesis Imperfecta

NCT05125809
View directory record Official record
Conditions
Osteogenesis Imperfecta
Interventions
Setrusumab, Placebo
Biological · Other
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
5 Years to 25 Years
Enrollment
183 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
22
States / cities
Little Rock, Arkansas • Los Angeles, California • Sacramento, California + 19 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2026 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 4 Interventional Results available

How Vitamin D Analogues Affect Endothelial Cells in Patients on Dialysis

NCT00528788
View directory record Official record
Conditions
Hyperparathyroidism, Secondary, Kidney Failure, Chronic
Interventions
doxercalciferol
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 22, 2016 · Synced Oct 11, 2026, 2:22 PM 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 11, 2026, 2:22 PM EDT
Terminated Phase 2 Interventional Results available

Studies With 1,25-Dihydroxycholecalciferol

NCT00001151
View directory record Official record
Conditions
Hypocalcemia, Rickets
Interventions
1,25-Dihydroxycholecalciferol
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1976 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 25, 2013 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 4 Interventional Results available

Vitamin D and Coronary Calcification Study

NCT00752102
View directory record Official record
Conditions
Chronic Kidney Disease, Vitamin D Deficiency, Coronary Calcification, Disorders of Calcium and Bone Metabolism
Interventions
Calcitriol (Rocaltrol®), Paricalcitol
Drug
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
25 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 8, 2017 · Synced Oct 11, 2026, 2:22 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 11, 2026, 2:22 PM EDT
Completed Phase 4 Interventional Results available

Empiric Versus Selective Prevention Strategies for Kidney Stone Disease

NCT05365477
View directory record Official record
Conditions
Kidney Stones, Nephrolithiasis
Interventions
Empiric Therapy: Diet, Empiric Therapy: Drug, Selective Therapy: Diet, Selective Therapy: Drug
Behavioral · Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Collegiate Athlete Study

NCT07631312
View directory record Official record
Conditions
Iron Deficiency, Iron Deficiency Anemia (IDA), Vitamin D Deficiency, Vitamin D Insufficiency, Low Energy Availability, Bone Density
Interventions
Iron and Vitamin D Deficiencies Correction
Dietary Supplement
Lead sponsor
Morehouse School of Medicine
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Treatment of Vitamin D Insufficiency

NCT00933244
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
High Dose Vitamin D3, Low Dose Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Up to 75 Years · Female only
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 10, 2015 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Vitamin D for COVID-19 Trial

NCT04536298
View directory record Official record
Conditions
COVID-19
Interventions
vitamin D, Placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
2,024 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 24, 2025 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 1 Interventional

Arsenic Trioxide and Ascorbic Acid Combined With Bortezomib, Thalidomide, and Dexamethasone in Treating Patients With Relapsed or Refractory Multiple Myeloma or Plasma Cell Leukemia

NCT00258245
View directory record Official record
Conditions
Multiple Myeloma and Plasma Cell Neoplasm
Interventions
ascorbic acid, arsenic trioxide, bortezomib, dexamethasone, thalidomide, Aspirin
Dietary Supplement · Drug
Lead sponsor
Barbara Ann Karmanos Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 29, 2013 · Synced Oct 11, 2026, 2:22 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Efficacy of Vitamin D Supplementation to Sustain Performance Outcomes

NCT07654777
View directory record Official record
Conditions
Acute Stress Reaction
Interventions
Vitamin D3 (Cholecalciferol), Oral Placebo Tablet
Dietary Supplement
Lead sponsor
Walter Reed Army Institute of Research (WRAIR)
Federal
Eligibility
18 Years to 40 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Results available

Vitamin D to Improve Outcomes by Leveraging Early Treatment

NCT03096314
View directory record Official record
Conditions
Acute Respiratory Distress Syndrome, Vitamin D Deficiency, Critical Illness
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
1,358 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
47
States / cities
Fresno, California • Los Angeles, California • Sacramento, California + 34 more
Source: ClinicalTrials.gov public record
Updated Jan 27, 2020 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Not applicable Interventional

Haptoglobin Phenotype, Vitamin E and High-density Lipoprotein (HDL) Function in Type 1 Diabetes

NCT01098994
View directory record Official record
Conditions
Type 1 Diabetes, Heart Disease
Interventions
Vitamin E, Dummy pills
Dietary Supplement · Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
30 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 3, 2014 · Synced Oct 11, 2026, 2:22 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 11, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants

NCT00610688
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Prenatal Vitamin, Cholecalciferol (Vitamin D3)
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
192 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 19, 2021 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 3 Interventional Results available

Combination Chemotherapy in Treating Young Patients With Newly Diagnosed Acute Promyelocytic Leukemia

NCT00866918
View directory record Official record
Conditions
Childhood Acute Promyelocytic Leukemia With PML-RARA, Myeloid Neoplasm
Interventions
Arsenic Trioxide, Cytarabine, Diagnostic Laboratory Biomarker Analysis, Idarubicin, Mercaptopurine, Methotrexate, Mitoxantrone Hydrochloride, Tretinoin
Drug · Other
Lead sponsor
Children's Oncology Group
Network
Eligibility
2 Years to 21 Years
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2022
U.S. locations
112
States / cities
Birmingham, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 87 more
Source: ClinicalTrials.gov public record
Updated Oct 25, 2022 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Melatonin-Micronutrients for Osteopenia Treatment Study

NCT01870115
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Fiber Pill, Melatonin, Strontium citrate, Vitamins D3 and K2
Dietary Supplement
Lead sponsor
Duquesne University
Other
Eligibility
Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Oct 11, 2026, 2:22 PM EDT
Completed Phase 2 Interventional Results available

A Study in Adult Patients With Type I, III or IV Osteogenesis Imperfecta Treated With BPS804

NCT03118570
View directory record Official record
Conditions
Osteogenesis Imperfecta, Type I, Osteogenesis Imperfecta Type III, Osteogenesis Imperfecta Type IV
Interventions
setrusumab, Calcium, Vitamin D, zoledronic acid (optional)
Drug · Dietary Supplement
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
18 Years to 75 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
12
States / cities
Birmingham, Alabama • Jacksonville, Florida • Baltimore, Maryland + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Oct 11, 2026, 2:22 PM EDT
Recruiting Phase 2Phase 3 Interventional

Effectiveness of Alternative Therapies in Maintaining Weight Loss Achieved by GLP-1 Medications Post-Cessation

NCT07092618
View directory record Official record
Conditions
Longevity, GLP-1, Geroscience, Aging
Interventions
Metformin, Rapamycin, Naltrexone, Vitamin C
Drug · Dietary Supplement
Lead sponsor
AgelessRx
Industry
Eligibility
40 Years to 85 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 30, 2025 · Synced Oct 11, 2026, 2:22 PM EDT