Clinical trials: Vitamin D Status
Vitamin D Status, Healthy
Comparison of the Efficacy of Calcium-cholecalciferol Foodstuffs and Calcium-cholecalciferol Supplement
This study is conducted in two phases. At the first phase, the prevalence of vitamin D insufficiency in primary school-children in Tehran is determined during the cold seasons of 2008.
- Trial name
- NCT00864539
- Testing
- fortified milk, plain milk, fortified orange juice
- Volunteers
- 585 people, healthy volunteers welcome
- Sponsor
- National Nutrition and Food Technology Institute
Vitamin D 25-Hydroxylase Deficiency, Undernutrition
Impact of Trout Fish, Cow Milk With Egg, Vitamin D Supplementation, and Dietary Education on Vitamin D Status, Undernutrition, and Neurocognitive Outcomes Among School Children in Pakistan: An Open-label Individually Randomized Controlled Trial
Vitamin D deficiency and undernutrition are major public health concerns globally, particularly among children in low-resource and high-altitude settings.
- Conditions
- Vitamin D 25-Hydroxylase Deficiency, Undernutrition, Neurocognitive Development
- Trial name
- NCT07864662
- Testing
- Vitamin D supplement 4000 IU weekly, 200 grams of cooked trout fish, 250 milliliters of whole cow milk + whole egg
- Where
- Pakistan
- Volunteers
- 304 people
- Sponsor
- Aga Khan University
Maternal Care Patterns, Child Nutrition Disorders
Relationship Between Maternal Awareness About Vitamin D for Under- Five Years Children and Their Health Status Outcomes
The observational study aims to identify the relationship between maternal awareness about vitamin D for under-five-year-old children and their health status outcomes.
- Conditions
- Maternal Care Patterns, Child Nutrition Disorders, Vitamin D Deficiency
- Trial name
- Vit-D (NCT06562426)
- Testing
- Descriptive group on vitamin D awareness
- Where
- Egypt
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Alexandria University
Vitamin D Biofortification, Vitamin D Fortification
Vitamin D (Bio)Fortified Shopping Baskets to Improve Vitamin D Status
Vitamin D is essential for healthy bones, muscles, and immune function. It comes from food, supplements, and sunlight. There are two main forms; vitamin D2, found mainly in plant foods, and vitamin D3, which comes from animal…
- Conditions
- Vitamin D Biofortification, Vitamin D Fortification, Vitamin D Status
- Trial name
- NCT07349290
- Testing
- Vitamin D (bio)fortified food basket, Control food basket
- Where
- United Kingdom
- Volunteers
- 160 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Diabetes Mellitus, Type 1
GAD-Alum (Diamyd) Administered Into Lymph Nodes in Combination With Vitamin D in Type 1 Diabetes (DIAGNODE-1)
The objectives of the main study is to: Evaluate the safety of giving GAD-Alum (Glutamic acid decarboxylase) (Diamyd) directly into lymph glands in combination with an oral vitamin D regimen Evaluate how the above mentioned…
- Trial name
- DIAGNODE (NCT02352974)
- Testing
- GAD-Alum, Vitamin D
- Where
- Sweden
- Volunteers
- 12 people
- Sponsor
- Johnny Ludvigsson
Type 2 Diabetes, Nonalcoholic Fatty Liver Disease
Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes
This study is designed to study the effect of vitamin D intake on the severity of fatty liver and poor glucose control in patients with type 2 diabetes and fatty liver disease.
- Conditions
- Type 2 Diabetes, Nonalcoholic Fatty Liver Disease, Vitamin D Deficiency
- Trial name
- VDLS (NCT02132442)
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Massachusetts, Worcester
Healthy Schoolchildren
Sunlight Exposure and Vitamin D in Children
The purpose of this study is to examine the amount of sunlight exposure and vitamin D status of adolescent schoolchildren in each season throughout the year.
- Trial name
- NCT01477827
- Testing
- None - observational study
- Where
- United Kingdom
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- University of Manchester
Vitamin D Status, Muscle Function
Vitamin D Status and Muscle Function
People living at Northern latitudes are at risk of suffering from vitamin D insufficiency due to low sun exposure and the risk may be even more pronounced among elite swimmers since indoor training further reduces sun exposure.
- Trial name
- NCT02858882
- Testing
- Screening
- Volunteers
- 29 people, healthy volunteers welcome
- Sponsor
- University of Copenhagen
Asthma, Asthma Exacerbations
Vitamin D In the Prevention of Viral-induced Asthma in Preschoolers
In this 7-month randomized controlled trial, children aged 1 to less than 6 years, with recurrent asthma attacks triggered mostly by colds, will receive a high dose of vitamin D or a placebo every 3.5 months during their usual…
- Conditions
- Asthma, Asthma Exacerbations, Preschool Child, Vitamin D
- Trial name
- DIVA (NCT03365687)
- Testing
- Vitamin D
- Where
- 9 sites in Canada
- Volunteers
- 323 people
- Sponsor
- Professor Francine Ducharme
Healthy
The Effect of Vitamin D Fortification of Bread and Milk in Danish Families
Approximately 200 families corresponding to 800 persons are included in the study. The study investigate the efficacy of vitamin D fortification of bread and milk on vitamin D status in serum.
- Trial name
- VitMaD (NCT01184716)
- Testing
- Vitamin D fortification
- Where
- Denmark
- Volunteers
- 782 people, healthy volunteers welcome
- Sponsor
- Technical University of Denmark
Vitamin D Deficiency, 25-Hydroxyvitamin D3 Deficiency, Selective
Effect of Vitamin D3 Supplementation in Children From 12 to 30 Months of Age.
Background Vitamin D (VD) is essential for calcium absorption, bone health and growth in children. In a national representative sample authors found mean serum concentration of 25-Hydroxi-Vitamin-D (25-OH-D) of 59 nmol/L, in…
- Trial name
- NCT03544671
- Testing
- Vitamin D
- Where
- Mexico
- Volunteers
- 220 people, healthy volunteers welcome
- Sponsor
- Instituto Nacional de Salud Publica, Mexico
Hemophilia A, Hemophilia B
Correlation Between Vitamin D Status and Bone Mineral Density in Patients With Hemophilia
Study will look at baseline Vitamin D levels, calcium, albumin, liver enzymes, testosterone, osteocalcin, urine N telopeptides, bone mineral density, nutritional assessment and physical activity assessment of boys with hemophilia…
- Conditions
- Hemophilia A, Hemophilia B, Vitamin D Deficiency
- Trial name
- NCT01090206
- Testing
- Vitamin D and calcium
- Where
- United States
- Volunteers
- 20 people
- Sponsor
- Virginia Commonwealth University
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
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
Vitamin D
Vitamin D, Bones, Nutritional and Cardiovascular Status
Vitamin D is not seen anymore only as a phosphocalcic hormone, but also as having an effect on global health (anti-infective, anti-inflammatory, anti-tumour roles and cardiovascular protection).
- Trial name
- VITADOS (NCT01832623)
- Testing
- Exploration of Vitamin D roles
- Where
- France
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Hospices Civils de Lyon
Infant, Premature, Diseases
Calcium (ca),Phosphorus( P) and 25-hydroxyvitamin D(25OHD)] in Infants Born ≤ 32 PMA Gestational Weeks (GA)
It has not yet been established the optimal dose of vit. D for preterm infants in Poland. It is not known what dose of vit. D will provide the correct concentration of vit.
- Trial name
- Ca-P (NCT03691896)
- Testing
- Cholecalciferol 400, Cholecalciferol 800, Cholecalciferol 1200
- Where
- Poland
- Volunteers
- 200 people
- Sponsor
- Centre of Postgraduate Medical Education
Covid19
Vitamin D Status and Immune-inflammatory Status in Different UK Populations With COVID-19 Infection
Hypothesis: Serum Vitamin D (25(OH)D) is significantly lower in severe versus non-severe COVID-19 infections and that this is a function of ethnicity.
- Trial name
- NCT04519034
- Testing
- no intervention
- Where
- United Kingdom
- Volunteers
- 27,628 people
- Sponsor
- Guy's and St Thomas' NHS Foundation Trust
Cognitive Performance
Efficacy of a Milk-based Nutrient-rich Bar on Nutritional Status and Cognitive Performance of School Children in Vietnam
The objective of the study is to evaluate the impact of the milk-based nutrient-rich bar, specifically the effect of its fortification with zinc, iodine, vitamins A and D and calcium on nutritional status of school children…
- Trial name
- NCT01491581
- Testing
- food bar
- Where
- Vietnam
- Volunteers
- 415 people
- Sponsor
- Institut de Recherche pour le Developpement
Vitamin D Deficiency
Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants
The purpose of this study is to evaluate vitamin D (VD) deficiency in the population of Chilean Antarctica and evaluate the efficacy and safety of VD supplementation to decrease VD deficiency and favorably influence biomarkers…
- Trial name
- AntarD (NCT02930434)
- Testing
- cholecalciferol
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Pontificia Universidad Catolica de Chile
Vitamin D Deficiency, Pregnancy
Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina
Science News (October 2004) called vitamin D deficiency a "silent epidemic" in America, with no group unaffected. Using new guidelines of optimal vitamin D levels, more than 90% of African American women now suffer from vitamin D…
- Trial name
- NCT00412087
- Testing
- cholecalciferol (vitamin D3), cholecalciferol
- Where
- United States
- Volunteers
- 564 people, healthy volunteers welcome
- Sponsor
- Medical University of South Carolina