Clinical trials: Vitamin Deficiencies
Vitamin D Deficiency
Impact of Work Environment Absent of Natural Light on Vitamin D Levels
Three types of workers exposed to different levels of natural sunlight will be tested for Vitamin D blood level, PTH, Ca, P, albumin and alkaline phosphatase.
- Trial name
- NCT01385085
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Medical Corps, Israel Defense Force
Hyperphosphatemia
The Effect of Oral Niacinamide on Plasma Phosphorus Levels in Peritoneal Dialysis Patients
Hyperphosphatemia is common in the peritoneal dialysis population. Current strategies are insufficient to optimize phosphorus control.
- Trial name
- NCT00508885
- Testing
- Niacinamide
- Where
- United States
- Volunteers
- 17 people
- Sponsor
- Washington University School of Medicine
Vitamin D Deficiency, Diabetes Mellitus
Vitamin D and HbA1c Levels in Diabetic Patients With CKD
The purpose of this study is to determine the association between serum 25-hydroxyvitamin D and HbA1c levels in diabetic patients with chronic kidney disease.
- Trial name
- NCT02906319
- Volunteers
- 100 people
- Sponsor
- Ng Yong Muh
Vitamin D Deficiency, End Stage Renal Disease
A Study of Fixed Dose Versus Serum Level-Based Titration Regimen of Vitamin D Supplementation in Dialysis Patients
Vitamin D insufficiency, defined as serum 25-hydroxyvitamin (OH) D level less than 30 ng/ml, is highly prevalent not only in the general population but also in chronic kidney disease (CKD) population.
- Trial name
- NCT05434377
- Testing
- ergocalciferol supplementation, dialysis techniques, sunlight exposure time
- Where
- Thailand
- Volunteers
- 78 people
- Sponsor
- Chulalongkorn University
Acne Vulgaris, Vitamin D Deficiency
Impact of COVID-19 Vaccination on Serum 25-hydroxyvitamin D Level
Vitamin D plays a pivotal but still not well understood role in the immune response to coronavirus disease (COVID-19) infection and vaccination.
- Conditions
- Acne Vulgaris, Vitamin D Deficiency, COVID-19
- Trial name
- NCT05398939
- Testing
- Blood test and skin evaluation
- Where
- Taiwan
- Volunteers
- 20 people
- Sponsor
- National Taiwan University Hospital
Ckd-Mbd
Relationship Between Cardiopulmonary Exercise Testing and Ca-P in Chronic Kidney Disease (CKD)
Reductions in exercise capacity associated with exercise intolerance augment cardiovascular disease risk and predict mortality in chronic kidney disease.
- Trial name
- NCT04013139
- Testing
- CPET
- Where
- Iran
- Volunteers
- 200 people
- Sponsor
- Shahid Beheshti University of Medical Sciences
Peritoneal Dialysis-associated Peritonitis, Vitamin D Deficiency
Oral Vitamin D Supplementation Prevent Peritoneal Dialysis-related Peritonitis
This is a multicenter randomized, placebo-controlled trial of Vitamin D supplementation in patients on peritoneal dialysis to determine whether oral administration of vitamin D3 after curing an episode of peritonitis could reduce…
- Trial name
- VD-PD (NCT05860270)
- Testing
- Cholecalciferol
- Where
- China
- Volunteers
- 176 people
- Sponsor
- Peking University First Hospital
Iron Deficiency, Iron Deficiency Anemia
Enhancing Treatment of Iron Deficiency and Iron Deficiency Anemia With an Antioxidant, Vitamin E
The study addresses treatment of iron deficiency, the most common nutritional deficiency that infants and young children encounter.
- Trial name
- NCT01700426
- Testing
- Vitamin E
- Where
- United States
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- University of Colorado, Denver
Vitamin D Deficiency
Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults
This winter-based placebo-controlled, single-dose vitamin D randomized controlled trial (RCT) aims to examine the impact of various levels of habitual calcium intake on dietary vitamin D requirements in older adults stratified by…
- Trial name
- VitD-Ca (NCT01990872)
- Testing
- Vitamin D3 (20 micrograms/day)
- Where
- Ireland
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- University College Cork
Obesity &Amp; Overweight, Bariatric Surgery
Validation of a Score for Supplementation Needs of Vitamins, Micronutrients and Proteins After Bariatric Surgery
ABSTRACT Obesity is, nowadays, a pandemic. The treatment of patients affected by obesity is very complex and requires the synergy of a multidisciplinary team that addresses the problem in its different spheres.
- Conditions
- Obesity &Amp; Overweight, Bariatric Surgery, Bariatric Surgery Complication
- Trial name
- BARSCORE (NCT07268209)
- Where
- Spain
- Volunteers
- 4,514 people
- Sponsor
- Hospital Universitari de Bellvitge
Polycystic Ovarian Syndrome in Adolescent Females, Vitamin D Deficiency
Evaluation of the Clinical and Psychological Impact of Vitamin D Replacement in Adolescent Females at Risk for Polycystic Ovarian Syndrome (PCOS)
This study is a double blind, placebo controlled, randomized trial of study subjects with PCOS and low vitamin D to 2 groups- placebo and vitamin D replacement.
- Trial name
- NCT04355572
- Testing
- Vitamin D 4000IU daily
- Where
- United States
- Volunteers
- 60 people
- Sponsor
- Yale University
Prostate Cancer, Vitamin D Deficiency
Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among Veterans
Veterans between the ages of 50-75, who are having a prostate biopsy, will be recruited for their permission to collect an extra biopsy core for RNA-sequencing.
- Conditions
- Prostate Cancer, Vitamin D Deficiency, Stress Reaction
- Trial name
- VitD/RNA-seq (NCT04621500)
- Testing
- cholecalciferol, Standard of Care Prostate Biopsy - collection of 13th core for RNA-seq, Standard of Care Prostate Biopsies at baseline and after one year vitamin D3 supplementation
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical University of South Carolina
Vitamin D Deficiency, Osteoporosis
Vitamin D Administration in the Nursing Home
Administration of vitamin D 50,000 units once monthly will: Maintain serum 25-OH vitamin D above 20 ng/ml Reduce falls Increase calcaneal BMD Reduce bone turnover Be well tolerated: volunteers will not develop hypercalcemia…
- Trial name
- NCT00204919
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 96 people
- Sponsor
- University of Wisconsin, Madison
Type 2 Diabetes
Effects of Treating Vitamin D Deficiency in Poorly Controlled Type 2 Diabetes
This pilot study will investigate the effect of Vitamin D supplementation in improving glucose control with patients with poorly controlled diabetes and concurrent Vitamin D deficiency.
- Trial name
- NCT01855321
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 76 people
- Sponsor
- University of Florida
Vitamin D Deficiency
Serum and Semen Vitamin D Level With Semen Parameters
vitamin D may have multiple functions, one of them is modulating reproductive processes and the reproductive role of vitamin D is highlighted by expression of the vitamin D receptors in testis, male reproductive tract and sperms
- Trial name
- NCT03477136
- Testing
- ELISA to evaluate serum and seminal vitamin D level
- Where
- Egypt
- Volunteers
- 150 people
- Sponsor
- Assiut University
Vitamin D Deficiency, Osteoporosis
Vitamin D Deficiency in Elderly African American Women in Central Texas
In order to make bone health a reality for older adults, we need to consider the prevalence of Vitamin D deficiency in relation to environment latitude as well as vitamin D supplementation.
- Conditions
- Vitamin D Deficiency, Osteoporosis, Osteopenia
- Trial name
- NCT01971411
- Testing
- Calcium 500mg with 200 IU Vitamin D - 2 tablets daily, Blood levels of Vitamin D, Serum CTX, Mg, Ca++ and iPTH, Usual sun exposure documentation
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- McLennan County Medical Education and Research Foundation
Dental Implant, Dental Implant Failed
Effect of Systemic Vitamin D on Dental Implant Osseointegration
The primary goal for any oral implantologist is to obtain satisfactory healing and long-term treatment success. Osseointegration is the key to dental implant success8 and is required to achieve direct structural and functional…
- Conditions
- Dental Implant, Dental Implant Failed, Vitamin D Deficiency
- Trial name
- VIDOS (NCT07684404)
- Testing
- Vit D
- Where
- Egypt
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Future University in Egypt
Vitamin D Deficiency
Effect of an Inhibitor of Cholesterol Absorption on Vitamin D Levels
Double-blind randomized controlled trial to evaluate the serum levels of 25(OH)D after a single oral dose of cholecalciferol 50,000 IU plus ezetimibe or placebo.
- Trial name
- NCT02234544
- Testing
- Ezetimibe, Cholecalciferol
- Where
- Brazil
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Federal University of Rio Grande do Sul
Infertility, Vitamin D Deficiency
Effect of Vitamin D Supplementation on In-vitro Fertilization (IVF) Outcomes
Historically, vitamin D has been considered to play a role solely in bone and calcium metabolism. Numerous studies have suggested a link between vitamin D deficiency and adverse health outcomes such as malignancy, cardiovascular…
- Trial name
- NCT01419743
- Where
- 3 sites in United States
- Volunteers
- 102 people
- Sponsor
- Northwestern University
Avitaminosis, Delirium, Dementia, Amnestic, Cognitive Disorders
Interaction of Cobalamin Status With Nitrous Oxide in Relation to Postoperative Cognitive Changes in the Elderly
Low cobalamin (vitamin B12) levels are frequent in the elderly. Most often they reflect a mild metabolic abnormality without clinical symptoms (subclinical cobalamin deficiency).
- Trial name
- NCT00212147
- Testing
- General anesthesia with nitrous oxide, General anesthesia without nitrous oxide
- Where
- 2 sites in United States
- Volunteers
- 444 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
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