502 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 Not yet recruiting Effect of Vitamin D Supplementation in Patients With Heart Failure and Vitamin D Deficiency
Conditions: Heart Failure;   Vitamin D Deficiency
Interventions: Other: Vitamin D Supplementation;   Other: Control group (Placebo)
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 Not yet recruiting The Effects of Vitamin D Supplementation on Patients With Type 2 Diabetes and Vitamin D Deficiency
Conditions: Diabetes Mellitus;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
9 Unknown  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 Recruiting Effect of Vitamin D Treatment on Fatigue
Condition: Vitamin D Deficiency
Interventions: Drug: Vitamin D;   Other: placebo
13 Unknown  Effect of Vitamin D Supplementation on Hemoglobin A1c
Conditions: Diabetes Mellitus;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D
14 Recruiting Vitamin D in Pediatric Asthma: a Randomized Controlled Open-label Pilot Trial
Conditions: Asthma;   Vitamin D Deficiency
Interventions: Drug: Vitamin D2 + vitamin D3;   Drug: Vitamin D3
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 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
17 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
18 Recruiting Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Conditions: Polycystic Ovary Syndrome;   Healthy;   Vitamin D Deficiency
Interventions: Drug: Vitamin D supplementation;   Drug: Placebo
19 Recruiting Improving the Understanding of the Response to Vitamin D Supplementation
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: cholecalciferol;   Dietary Supplement: Placebo
20 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

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Indicates status has not been verified in more than two years