1213 studies found for:    Open Studies | vitamins
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Rank Status Study
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 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
3 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
4 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
5 Recruiting Vitamin D Supplementations and Postoperative Pain
Condition: Postoperative Pain
Interventions: Drug: Vitamin D;   Drug: Placebo
6 Recruiting Vitamin Supplementation After Bariatric Surgery
Conditions: Complications of Bariatric Procedures;   Avitaminosis
Interventions: Dietary Supplement: Chewable Multivitamin with Iron;   Dietary Supplement: PatchMD Vitamin D3/Calcium Patch;   Dietary Supplement: PatchMD Multivitamin Patch;   Dietary Supplement: PatchMD B12 Energy Plus Patch;   Dietary Supplement: Chewable Calcium;   Dietary Supplement: Quick Dissolve B12
7 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
8 Recruiting Vitamin K and Glucose Metabolism in Children at Risk for Diabetes (Vita-K 'n' Kids Study)
Conditions: Obesity;   Insulin Resistance;   Insulin Sensitivity;   Prediabetes;   Dyslipidemia;   Diabetes
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)
9 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)
10 Unknown  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
11 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
12 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
13 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
14 Unknown  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
15 Unknown  Impact of Vitamin D on Diabetic Kidney Disease in African Americans
Condition: Diabetic Kidney Disease
Intervention: Drug: Vitamin D3
16 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
17 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
18 Not yet recruiting Supplementation of Vitamin D in Patients With Type 2 Diabetes and Hypertension
Condition: Hypertension
Interventions: Dietary Supplement: supplementation of 100.000 IU of vitamin D3;   Dietary Supplement: placebo pill
19 Recruiting Calcium and High-dose Vitamin D Supplementation on Bone Mineral Density Among HIV-infected Children and Adolescents
Conditions: Adverse Bone Health;   HIV Infection
Interventions: Dietary Supplement: High dose vitamin D and calcium;   Dietary Supplement: Normal dose vitamin D and calcium
20 Unknown  The Beneficial Effect of Vitamin D Supplement to Peg Interferon Alpha 2a or to Telbivudine Monotherapy in Patients With Chronic Hepatitis B Virus (HBV) Infection
Condition: Hepatitis B Virus
Interventions: Drug: Peginterferon + Vitamin D;   Drug: Peginterferon;   Drug: Sebivo;   Drug: entecavir+ vitamin d

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Indicates status has not been verified in more than two years