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Found 926 studies with search of: Open Studies | vitamins
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Rank Status Study
1 Recruiting Treatment of Vitamin D Insufficiency
Conditions: Vitamin D Status;   Secondary Hyperparathyroidism;   Post-Menopause
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 Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom
Conditions: Vitamin D Deficiency;   Metabolic Syndrome;   Prediabetes
Interventions: Dietary Supplement: Mushroom fortified with 600 IU of vitamin D2;   Dietary Supplement: Mushroom fortified with 4000 IU of vitamin D2;   Dietary Supplement: Commercially available Vitamin D3 (600 IU) supplement;   Dietary Supplement: Commercially available Vitamin D3 (4000 IU) supplement
5 Recruiting The Effects of Vitamin E and Vitamin C and Exercise
Condition: Exercise and Non-exercise Effect Upon Vitamins E and C
Interventions: Dietary Supplement: Vitamin E and Vitamin C;   Drug: placeboes
6 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
7 Unknown † Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
8 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
9 Recruiting Vitamin D Supplementation and Metabolism in Vitamin D Deficient Elderly
Conditions: Vitamin D Deficiency;   Metabolic Syndrome
Interventions: Dietary Supplement: RDA Vitamin D3 only;   Dietary Supplement: Vitamin D2/3 Repletion only;   Other: Vitamin D2/3 Repletion + AEX;   Other: Vitamin D2/3 Repletion + RT
10 Not yet recruiting Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3 and Calcium
11 Recruiting A Randomized Phase III Study of Vitamins B6 and B12 to Prevent Chemotherapy-Induced Neuropathy in Cancer Patients
Condition: Cancer
Interventions: Dietary Supplement: Multivitamin, Vitamin B12, Vitamin B6.;   Dietary Supplement: Vitamin B12, Vitamin B6
12 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
13 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
14 Not yet recruiting Finnish Vitamin D Trial (FIND)
Conditions: Cardiovascular Diseases;   Cancer
Interventions: Dietary Supplement: Vitamin D3;   Dietary Supplement: Placebo
15 Recruiting Impact of Vitamin D on Diabetic Kidney Disease in African Americans
Condition: Diabetic Kidney Disease
Intervention: Drug: Vitamin D3
16 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)
17 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
18 Recruiting A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: cholecalciferol
19 Recruiting 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
20 Recruiting Study of Vitamin D in the Severely Mentally Ill
Conditions: Schizophrenia;   Schizoaffective Disorder
Intervention: Dietary Supplement: Vitamin D3

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† Indicates status has not been verified in more than two years
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