Clinical trials: Vitamin D Deficiency, completed
Vitamin D Deficiency, Pre Eclampsia
Evaluation of the Effectiveness of Vitamin D Supplementation to Pregnant Women and Their Infants in Pakistan.
Vitamin D deficiency is wide spread in South Asian population and is contributing to burden of disease in this region including Pakistan.
- Conditions
- Vitamin D Deficiency, Pre Eclampsia, Stillbirths, Low Birth Weight
- Trial name
- NCT01229189
- Testing
- Vitamin D
- Where
- Pakistan
- Volunteers
- 460 people
- Sponsor
- Aga Khan University
Vitamin D Deficiency, End Stage Renal Disease
A Study of 25-hydroxy Vitamin d Levels in Non-itching Hemodialysis Patients
Hypothesis: 25-hydroxy vitamin D levels in non-itching hemodialysis (HD) patients will be higher than those in HD patients with itching 25-hydroxy vitamin D levels will be measured in non-itching hemodialysis patients and…
- Trial name
- NCT01548716
- Where
- 2 sites in United States
- Volunteers
- 50 people
- Sponsor
- Winthrop University Hospital
Vitamin A Deficiency, Maternal Mortality
Impact of Maternal Vitamin A or Beta-Carotene Supplementation on Maternal and Infant Mortality in Bangladesh
The purpose of this trial is to determine whether providing women with a weekly oral supplement of vitamin A, either preformed or as beta-carotene, at a dosage equivalent to a recommended intake from early pregnancy through three…
- Conditions
- Vitamin A Deficiency, Maternal Mortality, Infant Mortality
- Trial name
- NCT00198822
- Testing
- Vitamin A or Beta-Carotene Supplements
- Where
- 3 sites in United States, Bangladesh
- Volunteers
- 59,666 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins Bloomberg School of Public Health
Vitamin D Deficiency
Vitamin D Dose-Response Study to Establish Dietary Requirements in Infants
The research team is comprised of an expert nutrition scientist and a pediatrician with expertise in endocrinology. Both have world-class experience in assessing bone mass in infancy.
- Trial name
- NCT00381914
- Testing
- Vitamin D
- Where
- Canada
- Volunteers
- 132 people, healthy volunteers welcome
- Sponsor
- McGill University
Vitamin D Deficiency
Vitamin D in Pediatric Crohn's Disease
Background: Crohn's disease (CD), a type of Inflammatory Bowel Disease (IBD), is a chronic relapsing inflammatory disorder of the digestive system.
- Trial name
- NCT01187459
- Testing
- Vitamin D
- Where
- 2 sites in Canada
- Volunteers
- 87 people
- Sponsor
- University of British Columbia
Healthy Humans
Immune and Metabolic Effects of Vitamin D Supplementation in Healthy Humans
In this placebo controlled study the investigators aim to investigate the effect of a 3 month vitamin D supplementation on parameters of the immune, endocrine and metabolic system in healthy women and men. Vitamin D.
- Trial name
- NCT01248442
- Testing
- Cholecalciferol
- Where
- Austria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Hypovitaminosis D, Insulin Resistance
Comparative Effectiveness of Vitamin D and Repletion Strategies
The importance of vitamin D (VitD) in the prevention and treatment of human health conditions has gained increased attention in recent years.
- Conditions
- Hypovitaminosis D, Insulin Resistance, Diabetes
- Trial name
- CEDARS (NCT01524874)
- Testing
- Vitamin D3
- Where
- 2 sites in United States
- Volunteers
- 66 people, healthy volunteers welcome
- Sponsor
- Bastyr University
Vitamin D Deficiency
The Effect of Fat on Vitamin D Absorption
The purpose of this study is to evaluate the absorption of dietary supplement of vitamin D3 (cholecalciferol), through the variation of 25 (OH) D levels, as the fat content of the meal associated with the administration of the…
- Trial name
- VITD_100484 (NCT01519986)
- Testing
- Vitamin D3
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Federal University of Rio Grande do Sul
Vitamin D Deficiency
Alternative Treatments of Vitamin D Deficiency
The purpose of the study is to compare the efficiency of UVB and vitamin D supplementation in treatment of vitamin D deficiency.
- Trial name
- NCT01512537
- Testing
- Narrowband UVB, Vitamin D and calcium
- Where
- Sweden
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- Lund University
Vitamin A Deficiency
Vitamin A Absorption From Cassava in Women
The purpose of this study is to determine the vitamin A equivalents in high-carotenoid varieties of cassava.
- Trial name
- FL-80 (NCT01381276)
- Testing
- Beta-Carotene bio-fortified cassava porridge without oil, Beta-Carotene bio-fortified cassava porridge with oil, White cassava porridge with retinyl palmitate reference dose
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- USDA, Western Human Nutrition Research Center
Vitamin D Deficiency
Impact of Vitamin D Status on Bones in Breastfed Infants
Vitamin D deficiency is widespread and linked to decreased bone mineral content. Little data exists regarding the vitamin D status and the relationship of 25-hydroxyvitamin D (25-OHD) status to functional bone health outcomes in…
- Trial name
- NCT00697294
- Testing
- Tri-Vi-Sol
- Where
- 3 sites in United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Baylor College of Medicine
Vitamin D Insufficiency, Vitamin D Deficiency
Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation
The purpose of the research is to describe vitamin D levels and bone status in a rural Wisconsin population. It is probable that individuals of varying age and ethnicity require different amounts of D to achieve optimal status.
- Trial name
- NCT00690417
- Testing
- Cholecalciferol (vitamin D3)
- Where
- United States
- Volunteers
- 108 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Vitamin D Deficiency
Vitamin D Supplementation in Systemic Lupus Erythematosus
Systemic Lupus Erythematosus (SLE) is a systemic autoimmune disorder. It mainly involves the skin, the joints, the nervous system and the kidney and may be life threatening.
- Trial name
- VITALUP (NCT01413230)
- Testing
- cholecalciferol
- Where
- 3 sites in France
- Volunteers
- 20 people
- Sponsor
- Assistance Publique - Hôpitaux de Paris
Vitamin D Deficiency
Vitamin D Levels in Residents in Medicine
the study aims to messure the vitamin D levels in medical staff in the hospital. The physicians in the course of their internship who work indoors and work many night shifts have limited sun exposure in all seasons.
- Trial name
- NCT01118806
- Where
- Israel
- Volunteers
- 106 people, healthy volunteers welcome
- Sponsor
- Meir Medical Center
Vitamin D Deficiency, Overweight
Vitamin D Supplement Study for Adolescents
The purpose of this study is to determine if 14-19 year old African American adolescents are able to take a daily vitamin D supplement daily for about 4 months and how well a daily dose of 400 IU or 2000 IU vitamin D supplement…
- Conditions
- Vitamin D Deficiency, Overweight, Obesity
- Trial name
- VIP (NCT00909454)
- Testing
- 2000 IU Vitamin D3 daily supplement, 400 IU Vitamin D3 supplement
- Where
- United States
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Augusta University
Vitamin D Deficiency
Effect of Consumption of Post-harvest UV-B Treated Mushrooms on Vitamin D Status of Healthy Adults
This study will investigate whether mushrooms treated with ultraviolet (UV) light to increase their vitamin D2 content are actually a good source of vitamin D when consumed daily with a meal (lunch).
- Trial name
- NCT01443897
- Testing
- 1,000 IU vitamin D2, mushrooms, UVB-treated mushrooms, 400 IU vitamin D2
- Where
- United States
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- USDA, Western Human Nutrition Research Center
Vitamin D Deficiency, Insulin Resistance
Assessment of Influence of Vitamin D on Insulin Secretion and Sensitivity in Obese Teenage Girls
The purpose of the study is to assess the relationship between vitamin D status and insulin- glucose dynamics in obese Adolescents.
- Conditions
- Vitamin D Deficiency, Insulin Resistance, Insulin Sensitivity, Obesity
- Trial name
- NCT00851396
- Where
- United States
- Volunteers
- 30 people
- Sponsor
- University of Alabama at Birmingham
Vitamin D Deficiency
Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers
Background: Vitamin D plays a key role in calcium absorption in the gut and in skeletal development. Vitamin D deficiency is common, affecting an estimated one billion people worldwide, including developed countries.
- Trial name
- NCT01105689
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Nemours Children's Clinic
Vitamin A Deficiency
Newborn Vitamin A (VA) Supplementation Pilot Project, Pakistan
Vitamin A is an essential micronutrient for the normal functioning of the visual system, growth and development, immunity and reproduction. Its deficiency causes anemia, growth retardation and xerophthalmia.
- Trial name
- VA (NCT00674089)
- Testing
- Vitamin A
- Where
- Pakistan
- Volunteers
- 7,400 people, healthy volunteers welcome
- Sponsor
- Aga Khan University
Vitamin D Deficiency, Renal Failure Chronic Requiring Hemodialysis
Hemodialysis Vitamin D Pilot
Vitamin D is a prohormone obtained through diet, supplementation, or sun exposure. Once absorbed, this nutritional vitamin D undergoes a two-step reaction in the liver and in the kidney to become the active hormone, calcitriol.
- Trial name
- NCT01214928
- Testing
- Cholecalciferol
- Where
- Canada
- Volunteers
- 20 people
- Sponsor
- St. Joseph's Healthcare Hamilton