1133 studies found for:    Open Studies | vitamins
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Rank Status Study
1 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
2 Recruiting 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
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 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
5 Recruiting Vitamin D and Vitamin B12 Supplementation With Pegylated Interferon-Alfa Plus Ribavirin for Treating Chronic Hepatitis C
Conditions: RNA Virus Infections;   Flaviviridae Infections;   Hepatitis C;   Hepatitis C, Chronic
Interventions: Drug: Vitamin D;   Drug: Vitamin B 12
6 Unknown  Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
7 Recruiting Effect of Antioxidant Vitamins on Coagulopathy and Nosocomial Pneumonia After Severe Trauma
Conditions: Coagulopathy;   Nosocomial Pneumonia
Interventions: Dietary Supplement: Vitamin C;   Dietary Supplement: Vitamin E;   Dietary Supplement: Saline (for Vitamin C);   Drug: Placebo (for Vitamin E)
8 Recruiting 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
9 Recruiting Effect of Vitamin K Supplementation on Markers of Diabetes Risk in Obese Children
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)
10 Recruiting 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
11 Recruiting Preventing Health Disparities During Pregnancy Through Vitamin D Supplementation
Condition: Vitamin D Status During Pregnancy.
Interventions: Drug: Vitamin D3 4000 IU in gummy form;   Drug: Placebo gummy vitamin
12 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
13 Recruiting Finnish Vitamin D Trial (FIND)
Conditions: Cardiovascular Diseases;   Cancer
Interventions: Dietary Supplement: Vitamin D3;   Dietary Supplement: Placebo
14 Recruiting Vitamin D and Breast Cancer: Does Weight Make a Difference?
Condition: Breast Cancer
Intervention: Drug: Vitamin D3
15 Recruiting Vitamin D Supplements for HIV-positive Patients on cART
Condition: HIV-associated Co-morbidities
Interventions: Dietary Supplement: conventional vitamin D treatment;   Drug: tiered/titrated vitamin D dosing
16 Unknown  Impact of Vitamin D on Diabetic Kidney Disease in African Americans
Condition: Diabetic Kidney Disease
Intervention: Drug: Vitamin D3
17 Recruiting Vitamin C to Decrease Effects of Smoking in Pregnancy on Infant Lung Function
Conditions: Pulmonary Function; Newborn, Abnormal;   Infant Wheeze;   In-utero Nicotine;   Second Hand Smoke
Interventions: Dietary Supplement: Vitamin C +prenatal vitamin;   Dietary Supplement: Placebo tablet+prenatal vitamin
18 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
19 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
20 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)

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