Clinical trials: Vitamin D Deficiency, completed
Vitamin D Deficiency
The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile
Participants in this study will be randomized to receive either oral vitamin D pills OR ultraviolet light treatment. The investigators will compare how these two methods of raising vitamin D levels will affect cholesterol levels.
- Trial name
- NCT01688102
- Testing
- Oral Vitamin D3, Ultraviolet Light
- Where
- United States
- Volunteers
- 118 people, healthy volunteers welcome
- Sponsor
- Rockefeller University
Hypophosphatasia, Bone Disease
Non-interventional Substudy of ALX-HPP-502 to Assess Natural History of Patients With Juvenile-onset HPP Who Served as Historical Controls in ENB-006-09
The purpose of this study is to characterize the natural history of HPP in patients with Juvenile-onset HPP who served as historical controls in ENB-006-09.
- Trial name
- NCT02235493
- Testing
- Retrospective Case Only
- Where
- United States
- Volunteers
- 6 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Hypophosphatasia (HPP)
A Retrospective Study of the Natural History of Patients With Severe Perinatal and Infantile Hypophosphatasia (HPP)
This study aims to characterize the natural history of patients with severe perinatal or infantile onset HPP.
- Trial name
- NCT01419028
- Where
- 12 sites in United States, Australia and 5 more
- Volunteers
- 48 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Osteoporosis, Osteopenia
Does Treatment of Hypovitaminosis D Increase Calcium Absorption?
The purpose is to perform a one-year study designed to assess whether treatment of hypovitaminosis D increases intestinal absorption of calcium, subsequent retention of calcium within bone, decreases bone turnover, and favorably…
- Conditions
- Osteoporosis, Osteopenia, Vitamin D Deficiency, Hypoparathyroidism
- Trial name
- NCT00581828
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 19 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Polycystic Ovary Syndrome, Vitamin D Deficiency
Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOS
The purpose of this study is to investigate the mechanism that explain the beneficial clinical effect of vitamin D treatment in women with PCOS.
- Trial name
- NCT03644212
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 79 people, healthy volunteers welcome
- Sponsor
- Maimonides Medical Center
Healthy
Defining Vitamin D Insufficiency in School Age Children: A Randomized Placebo Controlled Trial of Vitamin D3
The study objective is to characterize the threshold levels of serum 25-hydroxyvitamin D for the definition of vitamin D insufficiency in 8-14 year old African American and Caucasian children.
- Trial name
- Vitamin D RCT (NCT00732758)
- Testing
- Vitamin D3 1000 IU
- Where
- United States
- Volunteers
- 157 people, healthy volunteers welcome
- Sponsor
- University of Pittsburgh
X-linked Hypophosphatemia
Study of KRN23 (Burosumab), a Recombinant Fully Human Monoclonal Antibody Against Fibroblast Growth Factor 23 (FGF23), in Pediatric Subjects With X-linked Hypophosphatemia (XLH)
The objectives of the study are to: Identify a dose and dosing regimen of burosumab, based on safety and pharmacodynamic (PD) effect, in pediatric XLH participants Establish the safety profile of burosumab for the treatment of…
- Trial name
- NCT02163577
- Testing
- burosumab
- Where
- 9 sites in United States, France and 2 more
- Volunteers
- 52 people
- Sponsor
- Kyowa Kirin, Inc.
Deficiency of Vitamin D3
Optimizing Vitamin D in the Elderly
Vitamin D deficiency is highly prevalent in older people in the absence of vitamin D supplementation. The limited data available show marked inter-individual variability in response to vitamin D supplementation in very old, frail…
- Trial name
- NCT01554241
- Testing
- D3 2000 IU/day, D3 4000 IU/day, D3 50,000 IU weekly
- Where
- United States
- Volunteers
- 86 people
- Sponsor
- University of California, San Francisco
Vitamin D Deficiency
Topical Delivery of Vitamin D3 as Vitamin D Supplementation
After obtaining the approval from the IRB of University of Dammam and informed consent from 550 healthy patients, with vitamin D deficiency and vitamin D insufficiency and deficiency were recruited.
- Trial name
- NCT02735200
- Testing
- Application of topical vitamin d3 (Top-D), Application of Aloe vera gel
- Where
- Saudi Arabia
- Volunteers
- 550 people, healthy volunteers welcome
- Sponsor
- Imam Abdulrahman Bin Faisal University
Healthy Subjects, Vitamin D Deficiency
hCAP18 Levels and Vitamin D Deficiency in Healthy Subjects
Vitamin D deficiency (low levels of vitamin D in the blood) is a common problem. A recently discovered protein, called hCAP18, likely plays an important role in the immune system and may depend on adequate levels of vitamin D.
- Trial name
- NCT00742235
- Testing
- ergocalciferol
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
Secondary Hyperparathyroidism
Etelcalcetide to Treat Secondary Hyperparathyroidism in Hemodialysis Patients With Chronic Kidney Disease-Mineral and Bone Disorder
The purpose of this study is to evaluate the effect of thrice weekly intravenous (IV) administration of etelcalcetide in the treatment of secondary hyperparathyroidism (SHPT) in hemodialysis patients with chronic kidney…
- Trial name
- NCT01414114
- Testing
- Etelcalcetide
- Volunteers
- 37 people
- Sponsor
- KAI Pharmaceuticals
Vitamin D Deficiency, Insulin Resistance
Vitamin D, Insulin Resistance, and Cardiovascular Disease
In recent years, vitamin D has been shown not only to be important for bone and calcium metabolism but also for homeostasis of critical tissues involved in vascular disease in patients with diabetes.
- Conditions
- Vitamin D Deficiency, Insulin Resistance, Type 2 Diabetes Mellitus, Cardiovascular Disease
- Trial name
- NCT00736632
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 125 people
- Sponsor
- Washington University School of Medicine
Polycystic Ovarian Syndrome, Vitamin D Deficiency
Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome)
The investigators conducted a prospective un-blinded pilot study of Vitamin D plus Calcium (Ca) supplementation in overweight (BMI > 27) premenopausal women diagnosed with Polycystic Ovarian Syndrome (PCOS), as defined by the…
- Trial name
- NCT00743574
- Testing
- Vitamin D2 (Ergocalciferol), Medroxyprogesterone (Provera), Vitamin D3 (Cholecalciferol)
- Where
- United States
- Volunteers
- 36 people
- Sponsor
- Yale University
Hypovitaminosis D
The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates
The purpose of the study is to determine whether vitamin D supplementation in patients with hypovitaminosis D can decrease nonunion (failure to heal) incidence in patients with fractures of the humerus, femur, or tibia.
- Trial name
- VitD (NCT01691833)
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 113 people
- Sponsor
- Wake Forest University Health Sciences
HIV, Metabolic Syndrome
Incidence of HANA Conditions in HIV-infected Individuals
With the availability of effective anti-retroviral therapy, HIV-infected individuals are expected not to die of AIDS and have longer life expectancy.
- Conditions
- HIV, Metabolic Syndrome, Osteopenia, Osteoporosis
- Trial name
- NCT03483584
- Where
- Hong Kong
- Volunteers
- 215 people
- Sponsor
- Chinese University of Hong Kong
Human Immunodeficiency Virus (HIV)
Vitamin D3 Supplementation in Patients With HIV: Effects on Interleukin-6 Levels and CD4 Counts
This study aims to evaluate the effect of Vitamin D3 supplementation on inflammatory markers and immune status in patients with HIV who are receiving antiretroviral therapy.
- Trial name
- NCT07553052
- Testing
- Vitamin D3, Antiretroviral (ARV) medications
- Where
- Indonesia
- Volunteers
- 20 people
- Sponsor
- Universitas Sebelas Maret
Vitamin D Deficiency
Evaluation of Vitamin D Requirements During Pregnancy
The purpose of this study is to determine the effectiveness of vitamin D supplementation during pregnancy starting at the beginning of the second trimester.
- Trial name
- NCT00292591
- Testing
- cholecalciferol (vitamin D3), cholecalciferol
- Where
- United States
- Volunteers
- 501 people, healthy volunteers welcome
- Sponsor
- Medical University of South Carolina
Vitamin D Deficiency
Safety of Vitamin D Supplementation in Older Persons
This study will evaluate the safety over 6 months of two different doses of vitamin D (cholecalciferol) in men and women age 65 and older. It will also evaluate if supplementation with vitamin D improves physical performance.
- Trial name
- NCT00681590
- Testing
- cholecalciferol (vitamin D)
- Where
- United States
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- University of Miami
Chronic Lymphocytic Leukemia, Non-Hodgkin Lymphoma
Cholecalciferol in Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D Deficiency
This randomized pilot early phase I trial studies how well cholecalciferol works in treating patients with newly diagnosed non-Hodgkin lymphoma or chronic lymphocytic leukemia with low levels of vitamin D (vitamin D deficiency).
- Conditions
- Chronic Lymphocytic Leukemia, Non-Hodgkin Lymphoma, Untreated Chronic Lymphocytic Leukemia, Vitamin D Deficiency
- Trial name
- NCT02553447
- Testing
- Cholecalciferol, Laboratory Biomarker Analysis
- Where
- United States
- Volunteers
- 197 people
- Sponsor
- University of Nebraska
X-linked Hypophosphatemia
Open Label Study of KRN23 on Osteomalacia in Adults With X-linked Hypophosphatemia (XLH)
The primary objective of this study is to establish the effect of KRN23 treatment on improvement in XLH-associated osteomalacia as determined by osteoid volume (osteoid volume/bone volume, OV/BV).
- Trial name
- NCT02537431
- Testing
- burosumab
- Where
- 14 sites in United States, Canada and 4 more
- Volunteers
- 14 people
- Sponsor
- Kyowa Kirin, Inc.