532 studies found for:    Open Studies | "Vitamins"
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Rank Status Study
21 Recruiting Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Conditions: Polycystic Ovary Syndrome;   Healthy;   Vitamin D Deficiency
Interventions: Drug: Vitamin D supplementation;   Drug: Placebo
22 Recruiting Improving the Understanding of the Response to Vitamin D Supplementation
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: cholecalciferol;   Dietary Supplement: Placebo
23 Recruiting Stopping Postpartum Vitamin A Supplementation: Missing Concealed Benefit
Condition: Vitamin A Deficiency
Interventions: Dietary Supplement: Vitamin A (<3-day postpartum);   Dietary Supplement: Vitamin A (6 wk postpartum);   Dietary Supplement: Vitamin A (<3-day and 6 wk postpartum);   Dietary Supplement: Placebo
24 Not yet recruiting Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Major Surgical Procedures.
Condition: Vitamin d Deficiency
Interventions: Procedure: Blood draw pre-operatively;   Procedure: Blood draw post-operative Day 1;   Procedure: Blood draw post-operative Day 2
25 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
26 Recruiting Styrian Vitamin D Hypertension Trial
Conditions: Arterial Hypertension;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D3;   Dietary Supplement: Placebo
27 Unknown  Vitamin D Status in Pediatric Asthma
Condition: Vitamin D Deficiency
Intervention:
28 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
29 Recruiting Vitamin D and Vascular Health in Children
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3
30 Recruiting Vitamin D Supplementation in Older Adults With Urinary Incontinence
Conditions: Urinary Incontinence;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D;   Other: Placebo
31 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
32 Recruiting Vitamin D Repletion in Primary Hyperparathyroidism
Conditions: Primary Hyperparathyroidism;   Vitamin D Deficiency
Interventions: Dietary Supplement: 10,000 IU Vitamin D3;   Dietary Supplement: Placebo
33 Unknown  Vitamin D During Pregnancy
Condition: Vitamin D Deficiency
Interventions: Other: completion of a questionnaire;   Other: Blood draw
34 Recruiting Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease
Conditions: Crohn's Disease;   Vitamin D Deficiency
Intervention: Drug: Cholecalciferol
35 Recruiting Vitamin D Levels in Patients With Central Retinal Vein Occlusion- a Prospective Controlled Study
Conditions: Vitamin d Deficiency;   Central Retinal Vein Occlusion
Intervention:
36 Recruiting Vitamin D Supplementation for Extremely Preterm Infants
Conditions: Vitamin D Deficiency;   Preterm Infants;   Bronchopulmonary Dysplasia
Interventions: Dietary Supplement: Cholecalciferol;   Dietary Supplement: Placebo
37 Unknown  Vitamin D Levels and Postoperative Hypocalcemia After Total Thyroidectomy
Conditions: Hypocalcemia;   Hypoparathyroidism;   Vitamin D Deficiency;   Thyroidectomy
Intervention:
38 Unknown  Safety of Vitamin D in the Elderly
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: cholecalciferol (vitamin D)
39 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)
40 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

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Indicates status has not been verified in more than two years