Clinical trials: Vitamin D Supplementation
Immune Tolerance
Vitamin D Supplementation and Regulatory FoxP3+ T Cells in the GUT
In this pilot study the investigators aim to investigate the effects of vitamin D supplementation on regulatory FoxP3+ T cells in the gastrointestinal mucosa in healthy women and men.
- Trial name
- NCT01538485
- Testing
- Cholecalciferol
- Where
- Austria
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Knee Osteoarthritis, Vitamin D Deficiency
Prospective, Assessment of Vitamin D and Calcium Supplementation, Improvement of Nutritional Status and Preoperative Rehabilitation in Patients Before Knee Arthroplasty.
Prospective randomized study of 150 patients qualified for knee arthroplasty between 2015 and 2017. Patients were randomized into 3 groups receiving vitamin D and calcium supplementation, increased protein supply and preoperative…
- Conditions
- Knee Osteoarthritis, Vitamin D Deficiency, Pain, Postoperative, Arthropathy of Knee
- Trial name
- NCT04291833
- Testing
- Intervention group 1, Intervention group 2, Control group 0
- Where
- Poland
- Volunteers
- 150 people
- Sponsor
- Jagiellonian University
Colorectal Cancer
Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults
Although dietary vitamin D supplementation has been used in the clinical setting for decades, the effect of supplementary vitamin D consumption on the structure of the microbiome has not been studied in humans in fine scale or…
- Trial name
- VDMT (NCT05387876)
- Testing
- Vitamin D intervention
- Where
- United States
- Volunteers
- 43 people, healthy volunteers welcome
- Sponsor
- Baylor University
New Biomarkers for Measuring Vitamin D Level
A New Paradigm for Vitamin D Sufficiency
Although the African-American (AA) population tends to have lower serum 25(OH)D levels compared to whites, there is no evidence that the lower 25(OH)D levels in African-Americans are harmful.
- Trial name
- NCT02969850
- Testing
- Vitamin D Supplementation, Calcium
- Where
- United States
- Volunteers
- 444 people, healthy volunteers welcome
- Sponsor
- NYU Langone Health
Nasopharyngeal Cancinoma (NPC)
Impact of Vitamin D on Therapeutic Respons in NPC Chemoradiated Patients
Nasopharyngeal cancer is the sixth most common cancer and the sixth leading cause of death in Indonesia. NPC is a radiosensitive cancer so radiotherapy is the basic therapy for NPC.
- Trial name
- NCT07042711
- Testing
- Vitamin D 5,000IU Oral Tablet
- Where
- Indonesia
- Volunteers
- 300 people
- Sponsor
- Universitas Indonesia
COVID-19 Pandemic, D Vitamin Deficiency
Impact of Vitamin D Supplementation on COVID-19 Vaccine Response and IgG Antibodies in Deficient Women.
Decreased immunity in individuals causes a decrease in vaccine response, and vitamin D worsens this course. Vitamin D is thought to be a vitamin that can strengthen the innate immune response, inhibit the adaptive system, and…
- Conditions
- COVID-19 Pandemic, D Vitamin Deficiency, Antibody Hypersensitivity
- Trial name
- CoVıD-19 (NCT05447065)
- Testing
- Vitamin D supplement
- Where
- Turkey (Türkiye)
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Ege University
Immune System Diseases, Infections
Epigenetic Memory of Vitamin D Supplementation
The investigators will study the mechanistic details of dietary programming of the epigenome at the example of epigenetic programming of primary human immune cells with the micronutrient vitamin D3.
- Conditions
- Immune System Diseases, Infections, Healthy Lifestyle
- Trial name
- VitDPAS (NCT06104111)
- Testing
- Vitamin D3
- Where
- Poland
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Polish Academy of Sciences
Prostate Cancer
Vitamin D3 Supplementation in Participants Diagnosed With Early-Stage Prostate Cancer Who Decide to Undergo Active Surveillance Treatment Regimen.
This clinical trial is aimed at measuring the effect of vitamin D3 supplementation on serum prostate-specific antigen (PSA) levels in patients diagnosed with early stage, low-grade, low-risk prostate cancer (Gleason score less…
- Trial name
- D3/PCa (NCT01045109)
- Testing
- cholecalciferol
- Where
- United States
- Volunteers
- 52 people
- Sponsor
- Medical University of South Carolina
Vitamin D Deficiency, Pre-Eclampsia
Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia
Vitamin D deficient pregnant ladies were selected and randomized into 2 groups for routine daily dose of multivitamin (400IU vitamin D3) versus maximum safest treatment daily dose (4000IU vitamin D3).
- Trial name
- NCT03101150
- Testing
- 400 IU Vitamin D3, 4000 IU Vitamin D3
- Volunteers
- 179 people, healthy volunteers welcome
- Sponsor
- King Fahad Medical City
Acne Vulgaris, Vitamin D
The Efficacy and Safety of Topical Vitamin D and Supplementation In Acne Vulgaris The Study of VDR, IL-1β, IL-6, IL-10 and IL-17 Expression
Introduction This document is a clinical trial protocol. This research will be conducted based on the standards of the Good Clinical Trial Method and regulations from the relevant institutions and ethics committees.
- Trial name
- NCT05758259
- Testing
- combination oral and topical vitamin D
- Where
- Indonesia
- Volunteers
- 105 people
- Sponsor
- Universitas Indonesia
Clozapine Resistant Schizophrenia
Vitamin D for Schizophrenia
Background: Despite improvements in medications, treatment delivery and rehabilitation, schizophrenia outcomes remain suboptimal. There are a proportion of 30-40% treatment-resistant schizophrenia patients.
- Trial name
- NCT01759485
- Testing
- Vitamin D3
- Where
- Israel
- Volunteers
- 47 people
- Sponsor
- Geha Mental Health Center
Vitamin D Deficiency, Thoracic Surgery
Prevention of Vitamin D Deficiency Following Pediatric CHD Surgery: a Phase II Dose Evaluation Randomized Controlled Trial Comparing Usual Care With a High Dose Pre-operative Supplementation Regimen Based on the Institute of Medicine Daily Upper Tolerable Intake Level
Our research group has shown that almost all children with congenital heart disease (CHD) are vitamin D deficient following heart surgery.
- Conditions
- Vitamin D Deficiency, Thoracic Surgery, Pediatric Disorders, Heart Defects, Congenital
- Trial name
- HICCUPS 2 (NCT01838447)
- Testing
- Cholecalciferol
- Where
- Canada
- Volunteers
- 46 people
- Sponsor
- Children's Hospital of Eastern Ontario
Vitamin D Deficiency
The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults
Many older adults do not get enough zinc, vitamin C and vitamin D, and this can be related to decreased ability to fight infection.
- Trial name
- NCT02876315
- Testing
- Redoxon VI
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Oregon State University
Implant Site Reaction
Perioperative Oral Vitamin D3 Supplementation on Implant Osseointegration
The number of patients treated in Implantology at Nantes University Hospital is 400 per year. This pilot study aims to demonstrate the efficacy of a 6-month oral cholecalciferol supplementation on osseointegration in patients…
- Trial name
- OSIVID (NCT06776640)
- Where
- France
- Volunteers
- 60 people
- Sponsor
- Nantes University Hospital
25-hydroxyvitamin D Concentration (Vitamin D Status)
D-Light Intervention
Vitamin D insufficiency has become a global concern, with low vitamin D status associated with bone disorders, cardiovascular disease and certain cancers.
- Trial name
- D-Light (NCT02495584)
- Testing
- Fortified milk (10µg vitamin D3), 10µg vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Insulin Resistance
Vitamin D Supplementation and Glycemic Outcomes
The investigators examined the effect of vitamin D supplementation on glucose homeostasis and metabolic markers in healthy normal weight and overweight young subjects and healthy normal-weight and overweight elderly subjects…
- Trial name
- NCT02942732
- Testing
- cholecalciferol (Euro-Pharm International, Canada)
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Université d'Auvergne
Obesity, Vitamin D3 Deficiency
Vitamins D and K Effects on Vascular Function in Obese Adults.
A prospective, randomized, placebo-controlled, double-blind study that aims to evaluate the effects of combined vitamin D3 and K2-MK7 supplementation on vascular function, sympathetic tone, metabolic biomarkers and inflammatory…
- Trial name
- NCT05689632
- Testing
- Vitamin D3 + K2-MK7, Vitamin D3
- Where
- Brazil
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Hospital Universitario Pedro Ernesto
Pulmonary Tuberculosis
Effect of Vitamin D and Zinc Supplementation on Inflammatory Biomarkers in Pulmonary Tuberculosis Patients
This study evaluates the effect of combined Vitamin D and Zinc supplementation on inflammatory biomarkers in pulmonary tuberculosis (TB) patients during the intensive phase of treatment.
- Trial name
- NCT07899138
- Testing
- Vitamin D (Cholecalciferol ), Zinc (zinc sulphate)
- Where
- Indonesia
- Volunteers
- 32 people
- Sponsor
- Hasanuddin University
Hypovitaminosis D
Impact of Hypovitaminosis D on Bone Disease in HIV Infected Patients
To determine the prevalence of hypovitaminosis D in HIV infected patients, and the consequences on secondary hyperparathyroidism, and bone mineral density (BMD).
- Trial name
- PuraVIHta (NCT02351284)
- Testing
- Measurement
- Where
- Spain
- Volunteers
- 300 people
- Sponsor
- Jose L. Casado
Hypovitaminosis D
Cholecalciferol Supplementation for Sepsis in the ICU
Sepsis in a clinical entity that occurs in patients with serious infections. Though the severity of illness may vary, every year, approximately 1.6 million Americans are treated for sepsis.
- Trial name
- CSI (NCT01896544)
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 30 people
- Sponsor
- Massachusetts General Hospital