Clinical trials: Deficiency, Vitamin D
Polycystic Ovary Syndrome, Hypovitaminosis D
The Effect of Vitamin D Supplementation Among Overweight Jordanian Women With Polycystic Ovary Syndrome (PCOS)
This is a prospective double-blind, randomized, parallel-group, placebo-controlled trial designed to examine the effect of supplementation with 50,000 IU vitamin D3 for 3 months on Polycystic Ovary Syndrome (PCOS) prognosis…
- Trial name
- NCT02328404
- Testing
- 50,000 IU vitamin D3
- Where
- Jordan
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Hayat Pharmaceutical Co. PLC
Hypovitaminosis D
Vitamin D Status and the Adequacy of Vitamin D Intake in Early Preterm Infants
Vitamin D is an essential nutrient. Deficiency of vitamin D is widespread. The prevalence of vitamin D deficiency in early preterm infants is unknown.
- Trial name
- NCT01793402
- Where
- United States
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Medical Center, Cincinnati
Vitamin D Deficiency, Cardiometabolic Risk Factors
Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels
This study aimed to compare the effects between sunlight exposure and oral vitamin D supplementation on serum 25-hydroxyvitamin D concentration and metabolic markers in Korean young adults.
- Trial name
- NCT03310242
- Testing
- Sunlight Exposure, Vitamin D Supplementation
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Seoul National University Hospital
Hypertension, Vitamin D Deficiency
Effects of Vitamin D on Renin Expression in Hypertensive Patients
The cardiovascular effects of vitamin D therapy (in humans) have been documented only in patients with known vitamin D deficiency or hyperparathyroidism (a surrogate marker of inadequate vitamin D activity).
- Trial name
- NCT00585442
- Testing
- calcitriol
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Utah
Congestive Heart Failure, Hypovitaminosis D
Pilot Study: Hypovitaminosis D, Hyperparathyroidism and Hypomagnesemia in Patients With Congestive Heart Failure
People with heart failure may have low magnesium and low vitamin D levels. They may also have abnormally high levels of parathyroid hormones.
- Conditions
- Congestive Heart Failure, Hypovitaminosis D, Hyperparathyroidism
- Trial name
- NCT00887666
- Where
- United States
- Volunteers
- 48 people
- Sponsor
- State University of New York - Downstate Medical Center
Vitamin D Deficiency
High Dose Vitamin D Replacement in Patients Undergoing Hematopoietic Stem Cell Transplantation
The purpose of this study is to test the efficacy and safety of high dose vitamin D therapy among HSCT patients in a tiered, step-wise manner (step one/two) in order to define treatment doses capable of providing vitamin D…
- Trial name
- NCT02876822
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 10 people
- Sponsor
- Children's Hospital Medical Center, Cincinnati
PRF, Vitamin D Deficiency
Effect of Vitamin D Deficiency on the Structure of Titanium Platelet-Rich Fibrin
ABSTRACT The aim of the study was to compare the macroscopic properties, chemical degradation levels, and fibrin network structures of T-PRF membranes obtained from systemically healthy individuals with optimal vitamin D levels…
- Conditions
- PRF, Vitamin D Deficiency, Vitamin Deficiency
- Trial name
- T-Prf (NCT06870786)
- Testing
- Vitamin D (Cholecalciferol )
- Where
- Turkey (Türkiye)
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Abant Izzet Baysal University
Critical Illness
Prediction Model of Vitamin D Deficiency
Many studies have pointed out that patients with vitamin D deficiency have a longer stay in the intensive care unit and a poor prognosis.
- Trial name
- NCT05376774
- Testing
- Admitted to intensive care units
- Where
- Taiwan
- Volunteers
- 662 people
- Sponsor
- National Taiwan University Hospital
X-linked Hypophosphatemia
Using Different Doses of Active Vitamin D Combined With Neutral Phosphate in Children With X-linked Hypophosphatemia
X-linked hypophosphatemia (XLH) is the most common form of heritable rickets. Current treatments include active vitamin D metabolites (e.g. calcitriol) and phosphate salts.
- Trial name
- NCT03820518
- Testing
- Calcitriol
- Where
- China
- Volunteers
- 100 people
- Sponsor
- Peking Union Medical College Hospital
Vitamin D Deficiency, Vitamin D Insufficiency
Evaluating the Effect of SOLIUS UV Light Source in Improving Vitamin D Status
The aim of this study is to evaluate the safety and effectiveness of the SOLIUS System in improving serum levels of 25-hydroxyvitamin D in vitamin D deficient/ insufficient adults of various skin types.
- Trial name
- NCT04780776
- Testing
- UVB treatment
- Where
- United States
- Volunteers
- 69 people, healthy volunteers welcome
- Sponsor
- Boston University
Vitamin D Deficiency, Critical Illness
Early Vitamin D3 Supplementation for Critically Ill Patients
There are no clear international guidelines for dosing vitamin D based on deficiency severity. Therefore, a new clinical trial is needed to evaluate the benefits of early vitamin D supplementation in maintaining sufficient levels…
- Trial name
- NCT05937789
- Testing
- Vitamin D3, Medium Chain Triglycerides (MCT)
- Where
- Taiwan
- Volunteers
- 240 people
- Sponsor
- National Taiwan University Hospital
Vitamin D Deficiency, Obstructive Sleep Apnea
Vitamin D Status in Obstructive Sleep Apnea With and Without Comorbidities
This retrospective observational study evaluates the relationship between vitamin D status and obstructive sleep apnea (OSA) in adults.
- Trial name
- NCT07788391
- Where
- Turkey (Türkiye)
- Volunteers
- 269 people, healthy volunteers welcome
- Sponsor
- Hisar Intercontinental Hospital
Vitamin D Deficiency, Metabolic Syndrome
Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom
The purpose of this study is to compare the safety and efficacy of two different amounts of vitamin D2 (600 or 4000 International Units/day) provided by mushrooms added to one of the daily meals versus same doses of vitamin D3…
- Conditions
- Vitamin D Deficiency, Metabolic Syndrome, Prediabetes
- Trial name
- NCT01488734
- Testing
- Mushroom with 600 IU vitamin D2, Mushroom with 4000 IU Vitamin D2, 600 IU Vitamin D3 and untreated mushroom
- Where
- United States
- Volunteers
- 47 people
- Sponsor
- Icahn School of Medicine at Mount Sinai
Systemic Lupus Erythematosus, SLE
Vitamin D3 in Systemic Lupus Erythematosus
The purpose of this study is to explore the impact of vitamin D3 on the expression of alpha interferon (IFN alpha) expression in systemic lupus erythematosus (SLE) patients with vitamin D deficiency.
- Conditions
- Systemic Lupus Erythematosus, SLE, Lupus
- Trial name
- NCT00710021
- Testing
- Vitamin D3
- Where
- 8 sites in United States
- Volunteers
- 57 people
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Infertility
Vitamin D Deficiency and Pregnancy Rates in Women Undergoing Frozen Embryo Transfer
Vitamin D receptors are present and differently expressed in murine endometrium and ovary throughout the estrous cycle , whereas knock-out experiments have shown that vitamin D receptor null mice experience uterine hypoplasia and…
- Trial name
- NCT01985672
- Testing
- Frozen embryo transfer
- Where
- Belgium
- Volunteers
- 280 people
- Sponsor
- Universitair Ziekenhuis Brussel
Vitamin D Deficiency, Alveolar Bone Loss
Vit D and Post-extractive Bone Turnover
The aims of the study was to correlate the extent of the dimensional alveolar bone changes after tooth extraction and contextual guided bone regeneration with serum vit D levels in 14 patients.
- Conditions
- Vitamin D Deficiency, Alveolar Bone Loss, Alveolar Bone Resorption
- Trial name
- NCT06412705
- Testing
- Tooth extraction, guided bone regeneration and dental implant
- Where
- Italy
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Studio Odontoiatrico Associato Dr. P. Cicchese e L. Canullo
Heart Failure With Reduced Ejection Fraction, Vitamin D Deficiency
Supplementation With Vitamin D to Patients With Heart Failure (D-Heart).
In 200 patients with documented systolic heart failure give supplementation with vitamin D in those with a 25-OH- vitamin D < 50nmol/L - or placebo.
- Trial name
- D-Heart (NCT03289637)
- Testing
- Vitamin D
- Where
- Sweden
- Volunteers
- 200 people
- Sponsor
- Linkoeping University
Vitamin D Deficiency
Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens
The trial plan to determine whether a daily capsule containing vitamin D(3) (2000 IU), calcium (600 mg), both, or a placebo for 6 months in UAE citizens with evidence of vitamin D deficiency will lead to a clinical benefit.
- Trial name
- NCT02662491
- Testing
- Vitamin D and calcium, Vitamin D, Calcium
- Where
- United Arab Emirates
- Volunteers
- 545 people, healthy volunteers welcome
- Sponsor
- United Arab Emirates University
Cystic Fibrosis, Vitamin D Deficiency
Vitamin D3 for the Treatment of Low Vitamin D in Cystic Fibrosis
Vitamin D deficiency is common in cystic fibrosis. Vitamin D deficiency frequently persists despite aggressive treatment with ergocalciferol, a vitamin D preparation also known as vitamin D2.
- Trial name
- NCT00762918
- Testing
- cholecalciferol
- Sponsor
- Children's Hospital of Philadelphia
Vitamin D Deficiency
The Role of Narrowband Ultraviolet B Exposure in the Maintenance of Vitamin D Levels During Winter
The investigators investigated the ability of narrowband ultraviolet B (nbUVB) treatment in the maintenance of vitamin D levels achieved during the summer in Finland.
- Trial name
- NCT02275650
- Testing
- nbUVB
- Where
- 2 sites in Finland
- Volunteers
- 37 people, healthy volunteers welcome
- Sponsor
- Joint Authority for Päijät-Häme Social and Health Care
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