502 studies found for:    Open Studies | "Vitamins"
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Rank Status Study
21 Recruiting The Effect of a High-dose Oral Vitamin D3 Bolus on Serum 25(OH)D3 and Vitamin D Receptor Target Gene Expression
Conditions: Vitamin D Receptor Target Gene Expression;   Serum 25(OH)D Concentration
Intervention: Dietary Supplement: Vitamin D3
22 Recruiting Effect of Vitamin D Supplementation on Coronary Calcification and Parathyroid Hormone in CKD Patients
Conditions: Chronic Kidney Disease;   Vitamin D Deficiency
Intervention: Drug: Vitamin D2
23 Recruiting Supplementary Vitamin B12 Affects on Elevated Homocysteine Levels of Vegetarians - Clinical Trial
Condition: Vitamin B12 Deficiency
Interventions: Dietary Supplement: Inactive lozenge;   Dietary Supplement: Methylcobalamin
24 Unknown  Vitamin D Status in Pediatric Asthma
Condition: Vitamin D Deficiency
Intervention:
25 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
26 Recruiting Vitamin D and Vascular Health in Children
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3
27 Recruiting Vitamin D Supplementation in Older Adults With Urinary Incontinence
Conditions: Urinary Incontinence;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D;   Other: Placebo
28 Recruiting Vitamin D, Insulin Resistance, and Cardiovascular Disease
Conditions: Vitamin D Deficiency;   Insulin Resistance;   Type 2 Diabetes Mellitus;   Cardiovascular Disease;   Hypertension
Interventions: Drug: Vitamin D3;   Drug: Placebo
29 Recruiting Vitamin D Repletion in Primary Hyperparathyroidism
Conditions: Primary Hyperparathyroidism;   Vitamin D Deficiency
Interventions: Dietary Supplement: 50,000 IU Vitamin D3;   Dietary Supplement: 12,000 IU Vitamin D3;   Dietary Supplement: Placebo
30 Unknown  Vitamin D During Pregnancy
Condition: Vitamin D Deficiency
Interventions: Other: completion of a questionnaire;   Other: Blood draw
31 Recruiting Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease
Conditions: Crohn's Disease;   Vitamin D Deficiency
Intervention: Drug: Cholecalciferol
32 Recruiting Vitamin D Levels in Patients With Central Retinal Vein Occlusion- a Prospective Controlled Study
Conditions: Vitamin d Deficiency;   Central Retinal Vein Occlusion
Intervention:
33 Recruiting Vitamin D Supplementation for Extremely Preterm Infants
Conditions: Vitamin D Deficiency;   Preterm Infants;   Bronchopulmonary Dysplasia
Interventions: Dietary Supplement: Cholecalciferol;   Dietary Supplement: Placebo
34 Unknown  Vitamin D Levels and Postoperative Hypocalcemia After Total Thyroidectomy
Conditions: Hypocalcemia;   Hypoparathyroidism;   Vitamin D Deficiency;   Thyroidectomy
Intervention:
35 Unknown  Safety of Vitamin D in the Elderly
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: cholecalciferol (vitamin D)
36 Recruiting Vitamin D3 Supplementation for Heart Failure Patients
Conditions: Heart Failure;   Vitamin D Deficiency;   Cardiomyopathy;   Congestive Heart Failure
Interventions: Drug: Placebo Comparator: Sugar Pill;   Drug: Vitamin D3 (cholecalciferol)
37 Unknown  Vitamin D Deficiency Causes Immune Dysfunction and Enables or Perpetuates the Development of Rheumatoid Arthritis
Conditions: Arthritis, Rheumatoid;   Vitamin D Deficiency
Interventions: Drug: Placebo in arm A and Vitamin D in arm B;   Drug: vitamin D 3 for arm A ,and matching placebo for arm B
38 Not yet recruiting Vitamin A, Stool Microbiota and Vaccine Response in Bangladeshi Infants
Condition: Vitamin A Deficiency
Intervention:
39 Recruiting Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI
Conditions: Spinal Cord Injury;   Vitamin D Deficiency
Intervention: Drug: Vitamin D3
40 Recruiting Vitamin D Intervention Trial in Healthy Chinese,Phase II
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Placebo;   Dietary Supplement: Vitamin D

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Indicates status has not been verified in more than two years