538 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 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)
4 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
5 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
6 Recruiting Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Conditions: Polycystic Ovary Syndrome;   Healthy;   Vitamin D Deficiency
Interventions: Drug: Vitamin D supplementation;   Drug: Placebo
7 Recruiting Vitamin D and Vascular Health in Children
Conditions: Obesity;   Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D3
8 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
9 Unknown  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
10 Recruiting 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
11 Recruiting Vitamin D Supplementation in Older Adults With Urinary Incontinence
Conditions: Urinary Incontinence;   Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D;   Other: Placebo
12 Not yet recruiting Vitamin D, Iodine, and Lead Levels in Haitian Infants and Children.
Conditions: Vitamin D Deficiency;   Iodine Deficiency;   Hypothyroidism;   Rickets;   Lead Intoxication
Intervention:
13 Unknown  Safety of Vitamin D in the Elderly
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: cholecalciferol (vitamin D)
14 Recruiting Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease
Conditions: Crohn's Disease;   Vitamin D Deficiency
Intervention: Drug: Cholecalciferol
15 Unknown  Vitamin D Replacement in Insulin Resistant South Asians
Conditions: Vitamin D Deficiency;   Insulin Resistance
Intervention: Drug: Vitamin D3 cholecalciferol
16 Not yet recruiting Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Major Surgical Procedures.
Condition: Vitamin d Deficiency
Interventions: Procedure: Blood draw pre-operatively;   Procedure: Blood draw post-operative Day 1;   Procedure: Blood draw post-operative Day 2
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 Unknown  Vitamin D During Pregnancy
Condition: Vitamin D Deficiency
Interventions: Other: completion of a questionnaire;   Other: Blood draw
19 Recruiting Vitamin A, Stool Microbiota and Vaccine Response in Bangladeshi Infants
Condition: Vitamin A Deficiency
Intervention:
20 Recruiting Vitamin D Repletion in Primary Hyperparathyroidism
Conditions: Primary Hyperparathyroidism;   Vitamin D Deficiency
Interventions: Dietary Supplement: 10,000 IU Vitamin D3;   Dietary Supplement: Placebo

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Indicates status has not been verified in more than two years