Clinical trials: Deficiency, Vitamin D
Magnesium Deficiency, Calcium Metabolism Disorders
How Does Magnesium Status Influence Calcium Homeostasis?
The investigators aim to recruit 60 women who have agreed to participate in an existing randomized, double-blind, placebo-controlled trial (Treatment of Vitamin D Insufficiency, HSC 2009-0055).
- Trial name
- NCT01593501
- Testing
- vitamin D3
- Where
- United States
- Volunteers
- 39 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Type 1 Diabetes, Vitamin D Deficiency/Insufficiency
The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM
The investigators are conducting a prospective cross-over study to evaluate the effects of vitamin D supplementation on diabetes control and the pro-inflammatory markers involved in microvascular complications in adolescents with…
- Trial name
- NCT01697228
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 26 people
- Sponsor
- Children's Hospital Los Angeles
Overweight, Hypovitaminosis D
Effects of Vitamin D Supplementation on Obesity, Inflammatory and Metabolic Markers
46 eligible overweight women with hypovitaminosis D are assigned to either vitamin D or control group using block randomization method.
- Trial name
- NCT05376865
- Testing
- Vitamin D supplement
- Where
- Iran
- Volunteers
- 46 people, healthy volunteers welcome
- Sponsor
- Tirang R. Neyestani, Ph.D.
Iron 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
Vitamin D Deficiency, Injuries
Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time
As indoor athletes, competitive gymnasts and swimmers can face the problem of a potential vitamin D deficiency. In the last decades, indoor sports participants have been faced with the problem of an institutionalized lifestyle…
- Conditions
- Vitamin D Deficiency, Injuries, Cardiovascular Risk Factor, Nutritional Deficiency
- Trial name
- NCT03584256
- Where
- Slovenia
- Volunteers
- 31 people
- Sponsor
- University of Ljubljana
Diabetes Mellitus, Vitamin D Deficiency
Does Vitamin D Improve Glycemic Control in Type II DM?
Vitamin D status has been negatively associated with the presence of type II DM and glycemic control. However, a cause-effect relationship between vitamin D deficiency and glycemic control has not been established.
- Trial name
- NCT01170442
- Testing
- vitamin D3 2000 IU, vitamin D3 5000 IU
- Where
- Saudi Arabia
- Volunteers
- 25 people
- Sponsor
- King Faisal Specialist Hospital & Research Center
Vitamin D Deficiency, Low Bone Density
Nursing-Home Residents Given Bread Fortified With Vitamin D3
Background. For older adults, serum 25-hydroxyvitamin D (25(OH)D) higher than 75 nmol/L lowers fracture risk and attainment of this 25(OH)D target may require 125 mcg (5000 IU)/d of vitamin D3.
- Trial name
- NCT00789503
- Testing
- Bread fortified with vitamin D3 and calcium
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- University of Toronto
Depression, Chronic Liver Disease
Vitamin D Improves Depression in Liver Patients
This study evaluates the efficacy of vitamin D replacement therapy in reducing depressive symptoms in patients with chronic liver disease and vitamin D deficiency.
- Trial name
- CLDVitD (NCT02359266)
- Testing
- Vitamin D
- Where
- Germany
- Volunteers
- 111 people
- Sponsor
- Universität des Saarlandes
Vitamin D3 Deficiency
Vitamin D as a Factor Modifying Adaptation to Exercise
Physical activity is a recommended, indispensable element of a healthy lifestyle as well as a countermeasure against many diseases often accompanied by the acute or chronic low grade inflammation.
- Trial name
- NCT03417700
- Testing
- NW training, HICT
- Where
- 2 sites in Poland
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Gdansk University of Physical Education and Sport
Cardiovascular Disease, Obesity
Vitamin D Ancillary Study in 5 Populations of African Origin
The availability of data on plasma 25-Hydroxyvitamin D (25(OH)D) concentrations in the last two rounds of the National Health and Nutrition Examination Survey (NHANES) has generated a high level of interest in the consequences of…
- Trial name
- VIDA (NCT02111902)
- Where
- 5 sites in United States, Ghana and 3 more
- Volunteers
- healthy volunteers welcome
- Sponsor
- Loyola University
Obesity, Childhood, Vitamin D Deficiency
The Changes of Body Composition, Glucolipid Metabolism and Bone Metabolism in Obese Children After Weight Loss
Vitamin D plays a significant role in calcium and phosphorus homeostasis for maintaining structural integrity and function of musculoskeletal system.
- Trial name
- NCT03490448
- Testing
- aerobic exercise and appropriate caloric control
- Where
- China
- Volunteers
- 53 people
- Sponsor
- Xinhua Hospital, Shanghai Jiao Tong University School of Medicine
Type 2 Diabetes
Vitamin D Inadequacy is Associated With Incidence of Type 2 Diabetes
Emerging evidence suggests that vitamin D [25-hydroxyvitamin D; 25(OH)D] may play a role in the etiology of type 2 diabetes. Vitamin D levels are lower in those with type 2 diabetes and impaired glucose tolerance (IGT) compared…
- Trial name
- NCT01508481
- Where
- South Korea
- Volunteers
- 1,500 people, healthy volunteers welcome
- Sponsor
- Seoul National University Bundang Hospital
Deficiency of Vitamin D3, COPD
The Pittsburgh Vitamin D Study: Vitamin D Supplementation in Vitamin D-deficient Subjects at Risk of Lung Cancer
This study aims to establish the ability of 4,000 IU oral vitamin D3 per day (in combination with a daily multivitamin) to safely convert vitamin D3-deficient subjects at increased risk of lung cancer to a vitamin D3-sufficient…
- Trial name
- NCT02532062
- Testing
- Cholecalciferol, multivitamin
- Where
- United States
- Volunteers
- 10 people
- Sponsor
- University of Pittsburgh
Anemia, Hemodialysis Complication
Cholecalciferol Supplementation in Hemodialysis Patients
This is prospective single-blind randomized study, in Ain Shams University hospital) in Egypt, to assess the impact of Cholecalciferol on Anemia status in regular hemodialysis outpatients
- Conditions
- Anemia, Hemodialysis Complication, Vitamin D Deficiency
- Trial name
- NCT05922696
- Testing
- Cholecalciferol
- Where
- Egypt
- Volunteers
- 50 people
- Sponsor
- Ain Shams University
Down Syndrome, Vitamin D Deficiency
Effect of Exercise Intensity on Vitamin D
Children with Down's syndrome (DS) are more liable to vitamin D deficiency. Treating this deficiency with supplements is associated with the risk of intoxication due to increased intestinal absorption or decreased vitamin D…
- Trial name
- NCT05024110
- Testing
- High intensity treamill exercise training., Moderate intensity treamill exercise training.
- Where
- Saudi Arabia
- Volunteers
- 44 people
- Sponsor
- Taif University
Back Pain, Hypovitaminosis D
Vitamin D Treatment to Patients Suffering From Chronic Pain and Vitamin D Hypovitaminosis
The objective of this study is to check whether vitamin D will lead to a decrease in pain intensity compare to placebo, in patients suffering from chronic pain.
- Trial name
- NCT01023490
- Testing
- Vitamin D
- Where
- Israel
- Volunteers
- 12 people
- Sponsor
- Tel-Aviv Sourasky Medical Center
Vitamin D Status
Vitamin D Supplementation and Immunity/Physical Performance
The purpose of this study is to examine the effect of vitamin D supplementation on vitamin D status, immunity and physical performance.
- Trial name
- NCT03132103
- Testing
- Oral Vitamin D3, Solar simulated radiation (SSR)
- Where
- United Kingdom
- Volunteers
- 260 people, healthy volunteers welcome
- Sponsor
- Bangor University
Sickle Cell Disease, Vitamin D Deficiency
High Dose Vitamin D Supplementation in Children With Sickle Cell Disease
Suboptimal vitamin D status is well reported in sickle cell disease (SCD) patients and associated with a negative impact on health-related quality of life (HRQL).
- Conditions
- Sickle Cell Disease, Vitamin D Deficiency, Health Related Quality of Life, Hand Grip Strength
- Trial name
- NCT06274203
- Testing
- Vitamin D3
- Where
- Egypt
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Zagazig University
BPPV, Benign Paroxysmal Positional Vertigo
Clinical Trial of Vit D and Calcium for Recurrent BPPV
Randomized double blind placebo controlled trial of vitamin D supplements, with or without calcium supplementation, versus placebo in reduction of recurrences in BPPV.
- Conditions
- BPPV, Benign Paroxysmal Positional Vertigo, Vertigo, Vertigo, Peripheral
- Trial name
- NCT05863949
- Testing
- vitamin D +/- calcium
- Volunteers
- 860 people
- Sponsor
- Ottawa Hospital Research Institute
Size of the Uterine Fibroids
Effect of Vitamin D on the Size of Fibroids in Women With Vitamin D Deficiency
Vitamin D supplementation in patients with uterine fibroids who present hypovitaminosis D to re-establish their normal serum values could stabilize the size of the uterine fibroids and thus prevent their growth or reduce their…
- Trial name
- NCT03991078
- Where
- Spain
- Volunteers
- 15 people
- Sponsor
- Fundación IVI
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