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1012 studies found for:    Open Studies | vitamins

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Rank Status Study
1 Recruiting Treatment of Vitamin D Insufficiency
Condition: Vitamin D Insufficiency
Interventions: Drug: High Dose Vitamin D3;   Drug: Low Dose Vitamin D3;   Drug: Placebo
2 Recruiting 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
3 Recruiting Determination of Effective Vitamin D Replacement and Monitoring Strategies in Vitamin D Deficiency State
Condition: Vitamin D Deficiency
Interventions: Drug: Vitamin D3 600,000 units IM;   Drug: Vitamin D3 600,000 Orally;   Drug: Vitamin D3 200,000 units IM;   Drug: Vitamin D3 200,000 Orally
4 Recruiting Assessment of Vitamin D Supplementation and Immune Function
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D - Treatment 1;   Dietary Supplement: Vitamin D - Treatment 2;   Dietary Supplement: Vitamin D - Treatment 3
5 Unknown † Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
6 Recruiting Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation
Condition: Vitamin D Deficiency
Interventions: Drug: vitamin D3 1000 IU orally daily for 5 months;   Drug: vitamin D3 3000 IU orally daily for 5 months;   Drug: vitamin D3 5000 IU orally daily for 5 months;   Drug: Placebo orally daily for 5 months
7 Not yet recruiting Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3 and Calcium
8 Recruiting A Randomized, Parallel, Double-blind, Placebo-controlled Study of Vitamin D as Prophylactic Treatment for Migraine
Condition: Migraine According to International Headache Society (IHS) Criteria (ICHD-II)
Interventions: Drug: D3 Vitamin ®;   Drug: Placebo
9 Unknown † Vitamin K2 and Vessel Calcification in Chronic Kidney Disease Patients
Conditions: Kidney Diseases;   Coronary Artery Calcification
Interventions: Drug: Vitamin K2+10μg cholecalciferol;   Drug: Vitamin D
10 Recruiting Vitamin D and Breast Cancer: Does Weight Make a Difference?
Condition: Breast Cancer
Intervention: Drug: Vitamin D3
11 Recruiting Vitamin D for Sickle-cell Respiratory Complications
Conditions: Sickle Cell Disease;   Vitamin D Deficiency;   Acute Chest Syndrome;   Asthma;   Respiratory Infections
Intervention: Drug: Vitamin D3
12 Recruiting Vitamin D Supplements for HIV-positive Patients on cART
Condition: HIV-associated Co-morbidities
Interventions: Dietary Supplement: conventional vitamin D treatment;   Drug: tiered/titrated vitamin D dosing
13 Not yet recruiting Finnish Vitamin D Trial (FIND)
Conditions: Cardiovascular Diseases;   Cancer
Interventions: Dietary Supplement: Vitamin D3;   Dietary Supplement: Placebo
14 Recruiting Impact of Vitamin D on Diabetic Kidney Disease in African Americans
Condition: Diabetic Kidney Disease
Intervention: Drug: Vitamin D3
15 Recruiting Vitamin C to Decrease Effects of Smoking in Pregnancy on Infant Lung Function
Conditions: Pulmonary Function; Newborn, Abnormal;   Infant Wheeze;   In-utero Nicotine;   Second Hand Smoke
Interventions: Dietary Supplement: Vitamin C +prenatal vitamin;   Dietary Supplement: Placebo tablet+prenatal vitamin
16 Recruiting Bioavailability of Vitamin D in Children and Adolescents With Crohn's Disease
Condition: Crohn's Disease
Interventions: Drug: Vitamin D3 3000 UI daily;   Drug: Vitamin D3 4000 UI daily
17 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
18 Not yet recruiting Vitamin D and Its Affect on Growth Rates and Bone Mineral Density Until Age 5
Condition: Vitamin D Deficiency
Interventions: Drug: Vitamin D;   Other: Placebo (for Vitamin D)
19 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
20 Unknown † The Beneficial Effect of Vitamin D Supplement to Peg Interferon Alpha 2a or to Telbivudine Monotherapy in Patients With Chronic Hepatitis B Virus (HBV) Infection
Condition: Hepatitis B Virus
Interventions: Drug: Peginterferon + Vitamin D;   Drug: Peginterferon;   Drug: Sebivo;   Drug: entecavir+ vitamin d
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† Indicates status has not been verified in more than two years