Clinical trials: Vitamin D
Cystic Fibrosis
Increased Vitamin D Reduces Pulmonary Exacerbations in CF
The investigators study is designed to test the hypothesis that correction of vitamin D in CF patients can increase their lung function and decrease the number of their pulmonary exacerbations.
- Trial name
- NCT02043717
- Testing
- Vitamin D
- Where
- Israel
- Volunteers
- 90 people
- Sponsor
- Hadassah Medical Organization
Vitamin D Deficiency
Vitamin D in Periodontal and Cardiovascular Disease Progression
Vitamin D has been considered to possess anti-inflammatory and antimicrobial activity which may be a link for the known interaction of periodontitis (CP) and coronary heart disease (CHD).
- Trial name
- NCT03873935
- Testing
- Evaluation of periodontal status
- Where
- Italy
- Volunteers
- 179 people, healthy volunteers welcome
- Sponsor
- University of Messina
Vitamin D Deficiency
Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes
The goal of this study is to determine whether Vitamin D supplementation improves strength and bone density, and reduces the risk of injury in collegiate athletes.
- Trial name
- NCT03151174
- Testing
- Vitamin D 10000 UNT, Vitamin D 5000 UNT
- Where
- United States
- Volunteers
- 68 people, healthy volunteers welcome
- Sponsor
- Virginia Polytechnic Institute and State University
Optimal Vitamin D Administration
Oral Vitamin D Supplementation in Elderly Women
The aim of this study is to compare oral vitamin D supplementation administered in two different ways, namely either twice a day (800IU/d, 292000IU/y) or three times a year (97333IU every 4 months, 292000IU/y) in elderly women in…
- Trial name
- NCT00575835
- Testing
- vitamin D twice daily, Vitamin D3 oil three times in a year
- Where
- Finland
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- University of Helsinki
Healthy, no Evidence of Disease
Cholecalciferol and Flu Vaccine in Treating Healthy Participants
This randomized clinical trial studies cholecalciferol and flu vaccine in treating healthy participants. Cholecalciferol may increase the immunologic response of flu vaccine in healthy participants.
- Trial name
- NCT01561989
- Testing
- cholecalciferol, questionnaire administration, trivalent influenza vaccine
- Where
- United States
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Roswell Park Cancer Institute
Pulmonary Disease, Chronic Obstructive
Cathelicidin and Vitamin D: Impact on Populations At-Risk and With COPD
This proposal will evaluate a potential mechanism of increased risk of lung function impairment, cathelicidin levels, as well as determine if vitamin D replacement can alter this pathway.
- Trial name
- NCT02464059
- Testing
- Vitamin D3
- Where
- 2 sites in United States
- Volunteers
- 23 people
- Sponsor
- University of North Carolina, Chapel Hill
Healthy Subjects
Human Intervention Study With Calcium Phosphate and Vitamin D
The study was conducted to investigate the effect of vitamin d3 alone and in combination with calcium phosphate on bone metabolism and further physiological parameters in healthy subjects.
- Trial name
- NCT01297023
- Testing
- calcium phosphate, vitamin d, calcium phosphate and vitamin d
- Where
- Germany
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of Jena
Spinal Anesthesia-induced Hypotension, Vitamin D Deficiency
Effect of Vitamin D Deficiency on the Frequency and Severity of Spinal Anesthesia-Induced Hypotension in Pregnant Women Undergoing Cesarean Section
Spinal anesthesia-induced hypotension remains a common and significant complication during cesarean sections, posing risks for both mother and fetus.
- Conditions
- Spinal Anesthesia-induced Hypotension, Vitamin D Deficiency, Cesarean Section
- Trial name
- NCT07057362
- Testing
- Intraoperative Hemodynamic Monitoring
- Where
- Turkey (Türkiye)
- Volunteers
- 177 people
- Sponsor
- Duzce University
Fibromyalgia, D Vitamin Deficiency
Valuation of Efficacy and Safety of Vitamin D3 Use in 80 Women Diagnosed With Fibromyalgia. Using FIQ Score and VAS.
Fibromyalgia is a disease that significantly decreases the quality of life of people who suffer from it, has great repercussions at the socio-economic level due to the incapacity it produces.
- Trial name
- NCT03369379
- Testing
- D3 Vitamin
- Where
- Mexico
- Volunteers
- 80 people
- Sponsor
- Universidad Autonoma de Nuevo Leon
Vascular Calcification
Oral Alfacalcidol and Coronary Artery Calcification in Predialysis Chronic Kidney Disease
Active vitamin D at therapeutic dose may prevent vascular calcification but in supraphysiologic dose may precipitate it.
- Trial name
- NCT01364688
- Testing
- oral alfacalcidol, no drug
- Where
- Thailand
- Volunteers
- 80 people
- Sponsor
- Ramathibodi Hospital
SARS-CoV 2
Impact of Zinc and Vitamin D3 Supplementation on the Survival of Aged Patients Infected With COVID-19
Mortality from Covid-19 increases with age, reaching 14.8% from the age of 80. The severity of the infection is linked to the acute respiratory distress syndrome (ARDS) which requires intensive care.
- Trial name
- ZnD3-CoVici (NCT04351490)
- Testing
- Zinc gluconate, 25-OH cholecalciferol
- Sponsor
- University Hospital, Lille
Skin Disease
Impact on UVB Narrow Band and UVA1 Therapy on Serum 25-hydroxyvitamin D Levels
We plan to investigate the serum elevation of 25(OH)D under UVB nb and UVA1 therapy, in order to determine the effect of these nowadays frequently used wavelengths for phototherapy on vitamin D plasma levels.
- Trial name
- NCT00910260
- Testing
- Blood analysis
- Where
- Switzerland
- Volunteers
- 116 people
- Sponsor
- University of Zurich
Vitamin D Deficiency, Cardiomyopathies
Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery?
Background and study aim: Heart diseases are among the most common causes of death worldwide. A large proportion of deaths are caused by heart attacks (myocardial infarction), where blood flow to the heart is reduced resulting in…
- Conditions
- Vitamin D Deficiency, Cardiomyopathies, Apoptosis, Inflammation
- Trial name
- NCT04323852
- Testing
- Vitamin D
- Where
- Iran
- Volunteers
- 70 people
- Sponsor
- Shahid Beheshti University of Medical Sciences
Vitamin d Deficiency
Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Major Surgical Procedures.
Vitamin D (Vitamin D) deficiency is very common. We recently showed that 97% of 204 patients admitted to Truman Medical Center were Vitamin D deficient (<30 ng/ml).
- Trial name
- NCT02138591
- Testing
- Blood draw pre-operatively, Blood draw post-operative Day 1, Blood draw post-operative Day 2
- Where
- United States
- Sponsor
- University of Missouri, Kansas City
Potential Abnormality of Glucose Tolerance, Appetite Disorders
Acute Effects of Juice Consumption With Biofunctional Compounds and Probiotics on Glucose Metabolism
This study investigated the short-term effects of fruit juice enriched with Vitamin D3 or n-3 PUFA or probiotics and the combination of the three ingredients on glucose metabolism.
- Trial name
- NCT05702359
- Testing
- Glucose as reference food, Control juice, Juice with vitamin D3
- Where
- Greece
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Agricultural University of Athens
Vitamin D Status
Getting Vitamin D Dosing Right
The investigators want to make sure that people get the right dose of Vitamin D treatment. They will therefore investigate how skin colour, body mass index, ethnicity, vitamin D binding protein and genetic variation affect the…
- Trial name
- NCT02474446
- Testing
- Vitamin D
- Where
- United Kingdom
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Sheffield Children's NHS Foundation Trust
Hypophosphatemia, Familial, Rickets
Hypophosphatemic Rickets in Norway
The purpose of the study is to do a follow-up survey of all individuals with hereditary hypophosphatemia in Norway, focusing on manifestations in childhood and adolescence.
- Conditions
- Hypophosphatemia, Familial, Rickets, Hyperphosphatemia
- Trial name
- NCT01057186
- Testing
- Alfacalcidol; phosphate., Sevelamer
- Where
- Norway
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Haukeland University Hospital
Atherosclerosis, Systemic Lupus Erythematosus
Vitamin D to Improve Endothelial Function in SLE
Determine the effect of vitamin D repletion on flow mediated dilation (FMD, a measure of endothelial function) in vitamin D deficient systemic lupus erythematosus (SLE) patients.
- Trial name
- NCT01911169
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 9 people
- Sponsor
- Medical University of South Carolina
Breast Cancer
Changes in Breast Cancer Biomarkers Using Synergistic Prostaglandin Inhibitors
This is a biomarker study with the goal of measuring changes in proteins and gene methylation. This study is not intended for use in diagnosing, mitigating, treating, curing, or preventing disease.
- Trial name
- NCT01425476
- Testing
- Celecoxib, Cholecalciferol
- Where
- United States
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Hartford Hospital
Type 2 Diabetes Mellitus
Does Vitamin D Reduce Risk of Developing Type II DM in High Risk Individuals
Both vitamin D deficiency and type II DM/prediabetes are highly prevalent. Vitamin D status has been negatively associated with the presence of type II DM and glycemic control.
- Trial name
- NCT01170468
- Testing
- Vitamin D3
- Where
- Saudi Arabia
- Volunteers
- 25 people
- Sponsor
- King Faisal Specialist Hospital & Research Center