991 studies found for:    Open Studies | vitamins
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1 Unknown  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
2 Recruiting High Dose Vitamin D vs Standard Dose Vitamin D Study
Condition: Breast Cancer
Interventions: Drug: 800 IU Vitamin D Supplement;   Drug: 50,000 IU Vitamin D supplement
3 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
4 Unknown  A Randomized, Parallel, Double-blind, Placebo-controlled Study of Vitamin D as Prophylactic Treatment for Migraine
Condition: Migraine According to International Headache Society (IHS) Criteria (ICHD-II)
Interventions: Drug: D3 Vitamin ®;   Drug: Placebo
5 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
6 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
7 Recruiting Vitamin D Absorption in HIV Infected Young Adults Being Treated With Tenofovir Containing cART
Condition: HIV Infection
Interventions: Dietary Supplement: Vitamin D3 50,000 IU;   Dietary Supplement: Vitamin D3 placebo
8 Recruiting Treatment for Non-Alcoholic Fatty Liver With Different Doses of Vitamin E
Condition: Fatty Liver
Interventions: Drug: Vitamin E 200 IU/d;   Drug: Vitamin E 400 IU/d;   Drug: Vitamin E 800 IU/d;   Behavioral: Diet and Exercise
9 Unknown  Intratracheal Vitamin A Administration With Surfactant for Newborn Respiratory Distress Syndrome
Conditions: RDS;   Infant, Newborn;   Vitamin A;   Surfactant
Interventions: Drug: surfactant;   Drug: surfactant+vitamin A
10 Recruiting Vitamin K and Glucose Metabolism in Children at Risk for Diabetes (Vita-K 'n' Kids Study)
Conditions: Obesity;   Insulin Resistance;   Insulin Sensitivity;   Beta-Cell Dysfunction;   Prediabetes
Interventions: Dietary Supplement: Placebo-Control;   Dietary Supplement: Low-Dose Vitamin K2 (menaquinone-7; 45 mcg/d);   Dietary Supplement: High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
11 Recruiting Vitamin K and Glucose Metabolism in Adults at Risk for Diabetes (Vita-K 'n' Adults Study)
Conditions: Obesity;   Insulin Resistance;   Insulin Sensitivity;   Beta-Cell Dysfunction;   Prediabetes
Interventions: Dietary Supplement: Placebo;   Dietary Supplement: Low-Dose Vitamin K2 Supplement (menaquinone-7; 90-mcg/d);   Dietary Supplement: High-Dose Vitamin K2 Supplement (menaquinone-7; 180-mcg/d)
12 Recruiting Vitamin D Status in Relation to Insulin Sensitivity Among Saudi Women With Polycystic Ovary Syndrome
Condition: Polycystic Ovary Syndrome
Interventions: Dietary Supplement: Vitamin D3 pills;   Other: Placebo pills
13 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
14 Unknown  The Effects of Vitamin B-6 Status on Homocysteine, Oxidative Stress, One-carbon Metabolism and Methylation: Cross-section, Case-control, Intervention and Follow-up Studies in Colorectal Cancer
Condition: Colorectal Cancer
Interventions: Dietary Supplement: Vitamin C;   Dietary Supplement: Vitamin B6;   Dietary Supplement: Folic acid;   Dietary Supplement: Vitamin B6 plus folic acid
15 Not yet recruiting Effect of Supplementary Vitamin D in Patients With Diabetes Mellitus and Pulmonary Tuberculosis
Conditions: Type 2 Diabetes Mellitus;   Pulmonary Tuberculosis
Interventions: Dietary Supplement: Vitamin D;   Dietary Supplement: Calcium;   Dietary Supplement: Placebo Vit D;   Dietary Supplement: Placebo Calcium
16 Not yet recruiting Role of Vitamin C to Augment Iron Chelation With DFP or DFX
Conditions: Vitamin c;   Thalassemia Major;   Iron Chelation
Interventions: Drug: Vitamin C, Defriprone, deferisarox;   Drug: deferiprone , deferesarox
17 Recruiting Bioavailability of Vitamin D in Children and Adolescents With Crohn's Disease
Condition: Crohn's Disease
Interventions: Drug: Vitamin D3 3000 UI daily;   Drug: Vitamin D3 4000 UI daily
18 Unknown  Impact of Vitamin D on Diabetic Kidney Disease in African Americans
Condition: Diabetic Kidney Disease
Intervention: Drug: Vitamin D3
19 Not yet recruiting An Evaluation of the Effect of Vitamin D Supplementation on the Cognitive Function of Older Subjects With Low Levels of This Vitamin
Intervention: Drug: Vitamin D
20 Not yet recruiting Follow-up Study With Clinical Vitamin D Supplementation Trial on Patients With Depression (DepFuD)
Conditions: Depression;   Depressive Disorder
Interventions: Dietary Supplement: Vitamin D 10 micrograms;   Dietary Supplement: Vitamin D 100 micrograms

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Indicates status has not been verified in more than two years