523 studies found for:    Open Studies | "Vitamins"
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Rank Status Study
21 Recruiting Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in Mongolia
Conditions: Pregnancy;   Vitamin D Deficiency
Interventions: Dietary Supplement: 600 IU Vitamin D3 in prenatal vitamin;   Dietary Supplement: 2000 IU Vitamin D3 in prenatal vitamin;   Dietary Supplement: 4000 IU Vitamin D3 in prenatal vitamin
22 Not yet recruiting Vitamin D Among Young Adults: an Intervention Study Using a Mobile 'App'.
Condition: Vitamin D Deficiency
Intervention: Behavioral: an educational video
23 Unknown  Interventional Trial of Vitamin D Deficiency in the Patients of General Departments
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: Alpha-D3
24 Recruiting Effect of Vitamin D Supplementation on Metabolic Parameters of Patients With Psoriasis
Conditions: Psoriasis;   Metabolic Syndrome;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D3;   Dietary Supplement: Placebo
25 Unknown  hCAP18 Levels and Vitamin D Deficiency in Chronic Kidney Disease
Conditions: Chronic Kidney Disease;   Vitamin D Deficiency
Interventions: Drug: Ergocalciferol;   Drug: Calcitriol
26 Not yet recruiting Effect of Vitamin D Supplementation in Patients With Heart Failure and Vitamin D Deficiency
Conditions: Heart Failure;   Vitamin D Deficiency
Interventions: Other: Vitamin D Supplementation;   Other: Control group (Placebo)
27 Recruiting Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes
Conditions: Type 2 Diabetes;   Nonalcoholic Fatty Liver Disease;   Vitamin D Deficiency
Intervention: Dietary Supplement: Ergocalciferol, placebo
28 Recruiting Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels
Condition: Vitamin D Deficiency
Interventions: Drug: ergocalciferol 2000 IU orally, daily;   Drug: ergocalciferol 25000 IU oraly every 2 weeks;   Drug: ergocalciferol 50000 IU orally every 4 weeks;   Drug: ergocal1000 IU & cholecal 1000 IU orally daily;   Drug: cholecalciferol 2000 IU orally daily;   Drug: Cholecalciferol 25000 IU orally every 2 weeks;   Drug: Cholecalciferol 50000 orally every 4 weeks;   Drug: placebo orally everyday
29 Recruiting Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function
Conditions: Vitamin D Deficiency;   Sarcopenia
Interventions: Dietary Supplement: vitamin D3;   Other: Placebo
30 Recruiting Bone Health and Vitamin D Status
Conditions: Osteopenia;   Vitamin D Deficiency;   HIV Infection
Intervention:
31 Recruiting Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers
Condition: Vitamin D Deficiency
Intervention: Other: Blood draw
32 Recruiting Trial of High Dose Vitamin D in Patient's With Crohn's Disease
Conditions: Crohn's Disease;   Vitamin D Deficiency
Interventions: Drug: Cholecalciferol 10,000 IU;   Drug: Cholecalciferol 400 IU
33 Recruiting Effect of Vitamin D Supplementation on Glucose Tolerance in Subjects at Risk for Diabetes With Low Vitamin D.
Conditions: Type 2 Diabetes Mellitus;   Vitamin D Deficiency
Interventions: Dietary Supplement: Control;   Dietary Supplement: Vitamin D
34 Unknown  Impact of Work Environment Absent of Natural Light on Vitamin D Levels
Condition: Vitamin D Deficiency
Intervention:
35 Unknown  Vitamin D Supplementation and the Immune Response
Condition: D Vitamin Deficiency Patients
Intervention: Drug: Vitamin D (drug)
36 Recruiting Determination of Vitamin D Dose to Maintain Sufficiency Amongst Indian and Malay Women in the Tropics
Condition: Vitamin D Deficiency
Intervention: Drug: Vitamin D3
37 Unknown  The Effect of Vitamin D Repletion in Patients With Hepatocellular Carcinoma on the Orthotopic Liver Transplant List
Conditions: Vitamin D Deficiency;   Hepatocellular Carcinoma
Interventions: Drug: Vitamin D3 4000 IU;   Drug: Vitamin D3 2000 IU
38 Not yet recruiting The Effect of Vitamin D Administration to Premature Infants on Vitamin D Status and Respiratory Morbidity
Conditions: Other Preterm Infants;   Vitamin D Deficiency;   Bronchiolitis;   Asthma;   Pneumonia
Intervention: Dietary Supplement: Vitamin D
39 Unknown  The Prevalence of Vitamin D Deficiency and Effects of Vitamin D Supplementation in HIV-1 Infected Patients
Conditions: Vitamin D Deficiency;   HIV Infections
Intervention: Drug: colecalciferol
40 Recruiting Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D
Conditions: Cardiovascular Disease;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D3;   Dietary Supplement: Placebo

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Indicates status has not been verified in more than two years