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474 studies found for:    Open Studies | "Vitamins"

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Rank Status Study
1 Recruiting Effect of Omega-3 Fatty Acid on Vitamin D Activation
Conditions: Hemodialysis Patients;   Vitamin D Insufficiency;   Vitamin D Deficiency
Interventions: Drug: Omega-3 fatty acid ethylester 90;   Other: Olive oil;   Other: cholecalciferol
2 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
3 Unknown † Efficacy of Vitamin D3 for the Treatment of Psoriatic Patients With Vitamin D Deficiency and Insufficiency
Conditions: Psoriasis Vulgaris;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D3;   Drug: Placebo
4 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
5 Recruiting Vitamin B6 Effects for Women Taking Birth Control Pills
Condition: Vitamin B6 Deficiency
Intervention: Dietary Supplement: Vitamin B6
6 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
7 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
8 Recruiting Vitamin D3 Substitution in Vitamin D Deficient Kidney Transplant Recipients
Conditions: Kidney Transplantation;   Vitamin D Deficiency;   Renal Osteodystrophy
Interventions: Drug: Cholecalciferol;   Drug: Placebo
9 Not yet recruiting Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D
10 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)
11 Recruiting Vitamin D Replacement in Insulin Resistant South Asians
Conditions: Vitamin D Deficiency;   Insulin Resistance
Intervention: Drug: Vitamin D3 cholecalciferol
12 Not yet recruiting Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3 and Calcium
13 Unknown † Effect of Vitamin D Supplementation on Hemoglobin A1c
Conditions: Diabetes Mellitus;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D
14 Recruiting Efficacy of β-carotene Biofortified Maize in Reducing Vitamin A Deficiency Among Children
Conditions: Vitamin A Deficiency;   Low Serum Retinol
Interventions: Dietary Supplement: β-Carotene Biofortified Maize Flour;   Dietary Supplement: White Maize Flour
15 Recruiting Vitamin D as a Supplement Against Falls in Elderly Study
Condition: Vitamin D Deficiency (10 ng/mL to 30 ng/mL)
Intervention: Dietary Supplement: Vitamin D
16 Recruiting Vitamin D Deficiency in Adolescent Girls
Conditions: Healthy;   Vitamin D Deficiency
Interventions: Dietary Supplement: ergocalciferol;   Other: placebo pill
17 Recruiting Primary Hyperparathyroidism (PHPT): Early Effect of Vitamin D
Conditions: Primary Hyperparathyroidism;   Hypercalcemia;   Vitamin D Deficiency;   Osteoporosis;   Osteopenia
Interventions: Dietary Supplement: Placebo;   Dietary Supplement: Vitamin D3
18 Not yet recruiting Vitamin B12 Acceptance and Biomarker Response Study
Condition: Vitamin B 12 Deficiency
Interventions: Drug: Oral administration of vitamin B12;   Drug: i.m. injection of vitamin B12
19 Recruiting The Genetics Behind Vitamin D Status (VitDgen)
Condition: Vitamin D Deficiency
Intervention: Genetic: VitDgen
20 Recruiting Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Conditions: Polycystic Ovary Syndrome;   Healthy;   Vitamin D Deficiency
Interventions: Drug: Vitamin D supplementation;   Drug: Placebo
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† Indicates status has not been verified in more than two years