Clinical trials: Vitamin D Deficiency, completed
Obesity, Pediatric, Obesity, Childhood
Efficacy of Vitamin D Supplementation in Obese Children
Vitamin D deficiency is common in the general population in the United States, but is more common in overweight and obese children.
- Conditions
- Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
- Trial name
- NCT02956408
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 6 people
- Sponsor
- Columbia University
Vitamin D Deficiency, Body Composition
GraviD-child Follow-up of the Children´s Health, Growth and Development Within the GraviD-study
GraviD is a multi-ethnic population-based pregnancy cohort. Pregnant women were invited to participate in the GraviD study when registering for antenatal care in parts of the region of Västra Götaland in Sweden in 2013-2014.
- Conditions
- Vitamin D Deficiency, Body Composition, Vascular Health, Cardiometabolic Risk
- Trial name
- NCT05228925
- Testing
- Maternal vitamin D status
- Where
- Sweden
- Volunteers
- 172 people
- Sponsor
- Göteborg University
Stroke, Oral Disease
Oral Health and Vitamin D in Stroke Patients
Stroke is a common, serious and restrictive global health problem. Restricting the activities of daily living of stroke patients impairs patients' ability to pay attention to oral hygiene.
- Conditions
- Stroke, Oral Disease, D Vitamin Deficiency
- Trial name
- NCT05418335
- Testing
- Clinical examination, functional status evaluation
- Where
- Turkey (Türkiye)
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Abant Izzet Baysal University
Vitamin D Deficiency
Vitamin D of Chinese Children and Adolescents
The aim of this study was to assess the vitamin D status and analyze risk factors for vitamin D inadequacy of Chinese children and adolescents aged 6-17y.
- Trial name
- NCT03221972
- Where
- China
- Volunteers
- 15,000 people
- Sponsor
- Lichen Yang
Psoriasis, Vitamin D Deficiency
The Effect of Vitamin D Supplementation on Psoriasis Severity
The study evaluates the effect of oral vitamin D supplementation on the severity of psoriasis measured by Psoriasis Area Severity Index (PASI) in adults with lower vitamin D levels.
- Trial name
- NCT03334136
- Testing
- 25-Hydroxyvitamin D
- Where
- Norway
- Volunteers
- 115 people
- Sponsor
- University Hospital of North Norway
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
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
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
End-Stage Renal Disease
Vitamin D3 Supplementation in Dialysis Patients
Vitamin D deficiency is highly prevalent among dialysis patients, and has been associated with cardiovascular risk factors such as increased aortic pulse wave velocity, blood pressure, inflammation, and brain natriuretic peptide.
- Trial name
- NCT01312714
- Testing
- Cholecalciferol
- Where
- Denmark
- Volunteers
- 64 people
- Sponsor
- Regional Hospital Holstebro
Schizophrenia, Metabolic Syndrome
The Influence of Vitamin D on Atypical Antipsychotic-induced Weight Gain
Schizophrenia and bipolar disorders are major public health problems. The second generation anti-psychotic drugs have efficacy for both positive and negative symptoms and a favorable risk profile as far as movement disorders.
- Conditions
- Schizophrenia, Metabolic Syndrome, Vitamin D Deficiency
- Trial name
- NCT02281162
- Testing
- Blood Draw
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Creighton University
COVID, Vitamin D Deficiency
Vitamin D Levels in SARS-CoV-2: Do Current Adequacy Thresholds Reflect Clinical Risk? Insights From a Large Turkish Cohort
Blood vitamin D levels may be associated with severity of viral infections. To find out If there is a statistically significant relation between blood 25-hydroxy vitamin D (25(OH)D) levels and disease severity, patients with…
- Trial name
- NCT04394390
- Testing
- vitamin d
- Where
- Turkey (Türkiye)
- Volunteers
- 1,100 people
- Sponsor
- Bursa City Hospital
Vitamin D Deficiency
Vitamin D3 Supplementation Pilot Study
The purpose of this research study is to determine whether taking vitamin D, every day, over a 12 week period will improve the vitamin D status, risks for poor heart health, risks for developing type 2 diabetes, and/or muscle…
- Trial name
- NCT01546103
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 39 people, healthy volunteers welcome
- Sponsor
- Children's Hospital of Philadelphia
Hypophosphatemic Rickets
Milk Products in the Treatment of Hypophosphatemic Rickets
The aim of this study was to investigate the feasibility and efficacy of a high intake of milk and/or cheese products compared to phosphate tablets in patients with hypophosphatemic rickets when evaluating the S-phosphate levels…
- Trial name
- NCT03348644
- Testing
- Phosphate tablets., High cheese intake., High milk intake.
- Where
- Denmark
- Volunteers
- 7 people
- Sponsor
- University of Aarhus
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
COVID-19 Pandemic, D Vitamin Deficiency
Impact of Vitamin D Supplementation on COVID-19 Vaccine Response and IgG Antibodies in Deficient Women.
Decreased immunity in individuals causes a decrease in vaccine response, and vitamin D worsens this course. Vitamin D is thought to be a vitamin that can strengthen the innate immune response, inhibit the adaptive system, and…
- Conditions
- COVID-19 Pandemic, D Vitamin Deficiency, Antibody Hypersensitivity
- Trial name
- CoVıD-19 (NCT05447065)
- Testing
- Vitamin D supplement
- Where
- Turkey (Türkiye)
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Ege University
Hypovitaminosis D, Deficiency of Micronutrients
Investigation of Vitamin D3 Enriched, Reduced-fat Yellow Cheese Efficacy to Prevent Vitamin D Deficiency
The primary aim of the current study was to investigate whether the consumption of vitamin D3 enriched, reduced-fat yellow cheese can counterbalance the expected decrease in serum 25-hydroxyvitamin D concentration during winter…
- Trial name
- NCT02543671
- Testing
- vitamin D3 enriched, reduced-fat yellow cheese, plain (non-fortified) reduced-fat yellow cheese
- Where
- Greece
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Harokopio University
Spinal Cord Injury, Vitamin D Deficiency
Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI
Studies have shown that individuals who have suffered a spinal cord injury are at an increased risk of Vitamin D deficiency compared to able-bodied individuals.
- Trial name
- NCT02099955
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 88 people
- Sponsor
- James J. Peters Veterans Affairs Medical Center
Dry Eye Syndromes, Hypovitaminosis D
Impact of Vitamin D3 Supplementation in Non-Sjogren Dry Eye Patients With Low Serum Vitamin D Level
Dry eye disease is multifactorial, ocular inflammatory condition causing irritation, stinging sensation, uneasiness and blurring. Non-Sjogren syndrome occurs due to absent or dysfunction of lacrimal gland.
- Trial name
- NCT05425914
- Testing
- Vitamin D, Artificial tear
- Where
- Pakistan
- Volunteers
- 108 people
- Sponsor
- University of Faisalabad
Vitamin d Deficiency, Preeclampsia
25- Hydroxyvitamin D Levels in Pregnancy and Effects on Pregnancy Related Disorders
Evaluation of 25- Hydroxyvitamin D levels in pregnant women in Austria and potential related disorders Hypothesis: Austrian pregnant women are Vitamin D deficient Present vitamin D supplementation in pregnancy is insufficient…
- Conditions
- Vitamin d Deficiency, Preeclampsia, Preterm Delivery, Gestational Hypertension
- Trial name
- VIDIS (NCT04637880)
- Where
- Austria
- Volunteers
- 249 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Congenital Adrenal Hyperplasia, Familial Hyperinsulinemic Hypoglycemia 1
Baby Detect : Genomic Newborn Screening
Newborn screening (NBS) is a global initiative of systematic testing at birth to identify babies with pre-defined severe but treatable conditions.
- Conditions
- Congenital Adrenal Hyperplasia, Familial Hyperinsulinemic Hypoglycemia 1, Phosphoglucomutase 1 Deficiency, Maturity Onset Diabetes of the Young
- Trial name
- BabyDetect (NCT05687474)
- Where
- Belgium
- Volunteers
- 6,824 people, healthy volunteers welcome
- Sponsor
- Centre Hospitalier Universitaire de Liege