Drug or intervention
Vitamin D Clinical Trials
Studies that test Vitamin D, alone, with other treatments or as the comparison.
In numbers
Open to volunteers: recruiting, not yet recruiting or enrolling by invitation. Active adds studies under way that have stopped recruiting.
Open to volunteers
All 305Iron Deficiency Anemia
Effect of Vitamin D Supplementation Added to Iron Therapy in Children With Iron Deficiency Anemia
This randomized controlled trial will evaluate the effect of two vitamin D3 supplementation regimens, administered in addition to oral iron therapy, on hematological and iron status in children aged 6-60 months with confirmed…
- Trial name
- NCT07892170
- Testing
- Elemental iron, Vitamin D3 2000 IU/day, Vitamin D3 400 IU/day
- Where
- Iraq
- Volunteers
- 120 people
- Sponsor
- AlFayhaa General Hospital
Ganglioneuroblastoma, Nodular, Neuroblastoma
Dinutuximab With Chemotherapy, Surgery and Stem Cell Transplantation for the Treatment of Children With Newly Diagnosed High Risk Neuroblastoma
This phase III trial tests how well the addition of dinutuximab to Induction chemotherapy along with standard of care surgical resection of the primary tumor, radiation, stem cell transplantation, and immunotherapy works for…
- Trial name
- NCT06172296
- Testing
- Biospecimen Collection, Bone Marrow Aspiration, Bone Marrow Biopsy
- Where
- 180 sites in United States, Australia and 3 more
- Volunteers
- 478 people
- Sponsor
- National Cancer Institute (NCI)
Hypovitaminosis D
The Effectiveness of a Weight-dependent Algorithm for Dosing Vitamin D.
Vitamin D is essential for calcium absorption and bone growth, brain development, and immune system function. Vitamin D is produced by the body in response to natural sunlight.
- Trial name
- NCT07876843
- Testing
- Vitamin D3, Calcium, and Vitamin C
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Atlantic Health System
Dental Implant
Effect of Vitamin D3 Supplementation on Serum Sphingosine-1-Phosphate Levels and Dental Implant Osseointegration: A Prospective Study
This study aims to evaluate whether vitamin D3 supplementation can promote dental implant osseointegration by increasing serum sphingosine-1-phosphate (S1P) levels.
- Trial name
- NCT07883811
- Testing
- Vitamin D3 ( Colecalciferol)
- Volunteers
- 60 people
- Sponsor
- Air Force Military Medical University, China
Upper GI Cancer
Immunonutrition for Surgical Prehabilitation of Patients With Upper GI Cancer
Perioperative immunonutrition has been proposed as a strategy to modulate the inflammatory response and improve outcomes after upper GI surgery.
- Trial name
- IMNUTPREH-UGIC (NCT07884214)
- Testing
- Oral nutritional supplements with immunonutrition (enriched with arginine, nucleotides, vitamin D and omega-3-fatty acid), Standart of care
- Where
- Spain
- Volunteers
- 110 people
- Sponsor
- Fundacion para la Investigacion Biomedica del Hospital Universitario Ramon y Cajal
Active Ulcerative Colitis
An Early-Stage Study in Multiple Clinics of How Afimkibart May Affect the Body's Processing of Medicines That Rely on Cytochrome P450 Enzymes in Participants With Ulcerative Colitis
The purpose of this study is to evaluate the disease-drug-drug interaction (DDDI) potential of afimkibart (also known as RO7790121).
- Trial name
- NCT07665723
- Testing
- Afimkibart, Caffeine, Warfarin
- Where
- 18 sites in United States, Belgium and 3 more
- Volunteers
- 25 people
- Sponsor
- Hoffmann-La Roche
Diabetic Foot Ulcer (DFU), Diabetic Symmetrical Polyneuropathy
Comparative Study of Combination Treatment of Bionerv E+ Versus Vitamin B Complex in Treatment of Diabetic Polyneuropathy in Type 2 Diabetic Patients and Its Effect on Wound Healing
Diabetic symmetrical polyneuropathy (DSPN) is a common complication of diabetes that affects the nerves, especially in the legs and feet. It can cause pain, numbness, tingling, weakness, and loss of sensation.
- Trial name
- NCT07877948
- Testing
- Alpha-Lipoic Acid, Vitamin B1, Vitamin B6, Vitamin B12, Vitamin E, Vitamin B1, Vitamin B6, Vitamin B12
- Where
- Malaysia
- Volunteers
- 100 people
- Sponsor
- BREGO Life Sciences
Antiphospholipid Syndrome, Thrombotic Antiphospholipid Syndrome
Anticoagulant Cessation After Antiphospholipid Autoantibodies Loss in Thrombotic Antiphospholipid Syndrome
This is an open-label, non-inferiority, randomized controlled trial with two parallel arms (experimental and control), following a PROBE (Prospective Randomized Open, Blinded Endpoint) design.
- Conditions
- Antiphospholipid Syndrome, Thrombotic Antiphospholipid Syndrome, Thrombosis
- Trial name
- ADORA (NCT07875153)
- Testing
- Vitamin K Antagonist - Drug, Anticoagulant Therapy Discontinuation
- Where
- France
- Volunteers
- 234 people
- Sponsor
- Assistance Publique - Hôpitaux de Paris
Localized Prostate Carcinoma, Stage IV Prostate Cancer AJCC v8
Immunological Effects of Vitamin D Replacement Among Black/African American Prostate Cancer Patients
This early phase I is to find out how common vitamin D insufficiency is among African American patients with a history of prostate cancer that has not spread to other parts of the body (localized) or has spread to other places in…
- Conditions
- Localized Prostate Carcinoma, Stage IV Prostate Cancer AJCC v8, Locally Recurrent Prostate Carcinoma, Metastatic Prostate Carcinoma
- Trial name
- NCT05045066
- Testing
- Cholecalciferol, Quality-of-Life Assessment, Biospecimen Collection
- Where
- 2 sites in United States
- Volunteers
- 220 people
- Sponsor
- Mayo Clinic
Graft-versus-host-disease (GVHD), Gastrointestinal
Vitamin C With Steroids for Gastrointestinal GVHD
After a transplant from another donor, one risk is graft versus host disease (GVHD) that happens because of differences between the donated cells (graft) and the patient's body cells (host).
- Trial name
- NCT07197749
- Testing
- Vitamin C (Ascorbic Acid)
- Volunteers
- 35 people
- Sponsor
- Baylor College of Medicine
Completed, with results posted
All –Healthy, Suboptimal Vitamin C Levels
The Impact of Qualia Vitamin C+ on Blood Vitamin C Levels
This is a double-blind, placebo-controlled, parallel-group, study evaluating the effect of a Qualia Vitamin C+ formulation on Whole Blood Vitamin C levels in the blood of healthy adults aged 25 years or older.
- Trial name
- NCT07285109
- Testing
- Qualia Vitamin C+
- Where
- United States
- Volunteers
- 36 people, healthy volunteers welcome
- Sponsor
- Qualia Life Sciences
Male Osteoporosis
Novel Combination Therapy for Osteoporosis in Men
Osteoporotic fractures are a key health problem in older men. Although there are drugs approved to treat osteoporosis in men [bisphosphonates, denosumab, and teriparatide (TPTD) or PTH(1-34)], there is a lack of knowledge on how…
- Trial name
- Osteo-Men (NCT03994172)
- Testing
- Teriparatide or human parathyroid hormone (PTH) 1-34, Cinacalcet, Calcium citrate tablet
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- VA Office of Research and Development
Tuberculosis
Pharmacokinetic and Pharmacodynamic Study of High-Dose Rifapentine and Moxifloxacin for Treatment of Tuberculosis
The Tuberculosis Trials Consortium (TBTC) Study 31 is a phase 3 trial evaluating rifapentine-containing regimens for treatment-shortening of drug-susceptible pulmonary tuberculosis.
- Trial name
- S31PK/PD (NCT02563327)
- Testing
- Rifapentine, Moxifloxacin, Rifampin
- Where
- 3 sites in United States, Uganda and 1 more
- Volunteers
- 2,516 people
- Sponsor
- Centers for Disease Control and Prevention
Pancreatic Neoplasms, Cancer of Pancreas
A Phase 2 Trial of High-dose Ascorbate for Pancreatic Cancer (PACMAN 2.1)
This clinical trial adds high-dose ascorbate (vitamin C) to the standard of care regimen for metastatic pancreatic adenocarcinoma (a type of pancreatic cancer).
- Conditions
- Pancreatic Neoplasms, Cancer of Pancreas, Cancer of the Pancreas, Neoplasms, Pancreatic
- Trial name
- NCT02905578
- Testing
- Gemcitabine, nab-paclitaxel, Pharmacological ascorbate
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- University of Iowa
SARS-CoV-2 Infection
Low vs. Moderate to High Dose Vitamin D for Prevention of COVID-19
The purpose of this study is to compare the risks of COVID-19 in individuals from Chicagoland communities randomized to low (400 IU/day) vs. moderate (4,000 IU/day) or high (10,000 IU/day) dose vitamin D.
- Trial name
- NCT04868903
- Testing
- Vitamin D3
- Where
- 2 sites in United States
- Volunteers
- 1,475 people, healthy volunteers welcome
- Sponsor
- University of Chicago