508 studies found for:    Open Studies | "Vitamins"
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Rank Status Study
1 Recruiting Vitamin Deficiencies and Suppletion in Morbid Obesity
Condition: Vitamin B12 Deficiency
Interventions: Drug: Hydroxocobalamin;   Drug: FitForMe vitamin B12
2 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
3 Recruiting The GLOBAL Vitamin D Study. A Genomic, Transcriptomic, Proteomic and Metabolomic Approach
Condition: Vitamin D Deficiency
Interventions: Drug: Cholecalciferol;   Drug: Placebo
4 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)
5 Recruiting Study To Understand Fall Reduction and Vitamin D in You
Conditions: Vitamin D Deficiency;   Falls
Interventions: Dietary Supplement: 200 IU/d cholecalciferol;   Dietary Supplement: 1000 IU/d cholecalciferol;   Dietary Supplement: 2000 IU/d cholecalciferol;   Dietary Supplement: 4000 IU/d cholecalciferol
6 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
7 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
8 Recruiting Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Conditions: Polycystic Ovary Syndrome;   Healthy;   Vitamin D Deficiency
Interventions: Drug: Vitamin D supplementation;   Drug: Placebo
9 Recruiting Nutritional Requirements for Vitamin D in Pregnant Women
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: 10 mcg Vitamin D3;   Dietary Supplement: 20 mcg Vitamin D3;   Dietary Supplement: Placebo
10 Recruiting Vitamin D and Vascular Health in Children
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3
11 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
12 Unknown  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
13 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
14 Recruiting The Efficacy of Pro-vitamin A Biofortified Cassava on Vitamin A Status in Nigerian Preschool Children
Condition: Vitamin A Deficiency
Interventions: Other: Pro-vitamin A biofortified cassava;   Other: White cassava
15 Recruiting Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease
Conditions: Crohn's Disease;   Vitamin D Deficiency
Intervention: Drug: Cholecalciferol
16 Recruiting Vitamin D Supplementation in Wheelchair Indoor Athletes
Conditions: Vitamin D Deficiency;   Spinal Cord Injury;   Drug Effects;   Dietary Supplements;   Physical Education and Training/Methods
Interventions: Dietary Supplement: Vitamin D;   Dietary Supplement: Placebo
17 Not yet recruiting Roles of Vitamin D and HDL in Obese Children
Conditions: Obese;   Vitamin D Deficiency;   Low HDL
Intervention: Dietary Supplement: Vitamin D
18 Recruiting Vitamin D and Microbiota in Cystic Fibrosis
Conditions: Vitamin D Deficiency;   Cystic Fibrosis
Interventions: Dietary Supplement: High-Dose Vitamin D3;   Other: Stool Sample;   Other: Sputum Sample;   Other: Sham Comparator;   Procedure: Blood draw
19 Recruiting Vitamin D Repletion in Primary Hyperparathyroidism
Conditions: Primary Hyperparathyroidism;   Vitamin D Deficiency
Interventions: Dietary Supplement: 10,000 IU Vitamin D3;   Dietary Supplement: Placebo
20 Unknown  Vitamin D Levels and Postoperative Hypocalcemia After Total Thyroidectomy
Conditions: Hypocalcemia;   Hypoparathyroidism;   Vitamin D Deficiency;   Thyroidectomy
Intervention:

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Indicates status has not been verified in more than two years