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Found 2895 studies with search of: vitamins
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Rank Status Study
1 Completed Study of Vitamin C, Vitamin E and Their Combination to Treat Restless Legs Syndrome in Hemodialysis Patients
Conditions: Restless Legs Syndrome;   Kidney Failure, Chronic
Interventions: Drug: Vitamin C & Vitamin E;   Drug: Vitamin C;   Drug: Vitamin E;   Drug: Vitamin C Placebo & Vitamin E Placebo
2 Completed Trial to Assess Vitamin D Requirements in Lactating Women
Conditions: Vitamin D Deficiency;   Vitamin D Insufficiency
Interventions: Drug: Cholecalciferol (Vitamin D3);   Drug: Calcium Carbonate;   Drug: Placebo - gelatin capsule
3 Recruiting Treatment of Vitamin D Insufficiency
Conditions: Vitamin D Status;   Secondary Hyperparathyroidism;   Post-Menopause
Interventions: Drug: High Dose Vitamin D3;   Drug: Low Dose Vitamin D3;   Drug: Placebo
4 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
5 Active, not recruiting Vitamin B6, B12, Folic Acid and Exercise in Parkinson's Disease
Condition: Parkinson's Disease
Interventions: Dietary Supplement: PD vitamin supplementation;   Other: PD exercise intervention;   Other: PD vitamin + exercise
6 Completed Vitamins, Breastmilk HIV Shedding, and Child Health
Condition: Maternal and Child Health Outcomes
Interventions: Dietary Supplement: Vitamin A alone;   Dietary Supplement: Multivitamins excluding vitamin A;   Dietary Supplement: multivitamins including vitamin A;   Other: Placebo
7 Recruiting Determination of Effective Vitamin D Replacement and Monitoring Strategies in Vitamin D Deficiency State
Condition: Vitamin D Deficiency
Interventions: Drug: Vitamin D3 600,000 units IM;   Drug: Vitamin D3 600,000 Orally;   Drug: Vitamin D3 200,000 units IM;   Drug: Vitamin D3 200,000 Orally
8 Recruiting Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom
Conditions: Vitamin D Deficiency;   Metabolic Syndrome;   Prediabetes
Interventions: Dietary Supplement: Mushroom fortified with 600 IU of vitamin D2;   Dietary Supplement: Mushroom fortified with 4000 IU of vitamin D2;   Dietary Supplement: Commercially available Vitamin D3 (600 IU) supplement;   Dietary Supplement: Commercially available Vitamin D3 (4000 IU) supplement
9 Active, not recruiting Randomized Trial: Maternal Vitamin D Supplementation to Prevent Childhood Asthma (VDAART)
Condition: Asthma
Interventions: Dietary Supplement: Vitamin D 3 cholecalciferol;   Dietary Supplement: Vitamin D3
10 Recruiting The Effects of Vitamin E and Vitamin C and Exercise
Condition: Exercise and Non-exercise Effect Upon Vitamins E and C
Interventions: Dietary Supplement: Vitamin E and Vitamin C;   Drug: placeboes
11 Completed Vitamin D and Genetics in Nutritional Rickets
Condition: Nutritional Rickets
Interventions: Dietary Supplement: Vitamin D + Calcium;   Dietary Supplement: Calcium;   Dietary Supplement: Vitamin D2;   Dietary Supplement: Vitamin D3
12 Recruiting Assessment of Vitamin D Supplementation and Immune Function
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D - Treatment 1;   Dietary Supplement: Vitamin D - Treatment 2;   Dietary Supplement: Vitamin D - Treatment 3
13 Completed Comparison of Efficacy of Different Dosages Vitamin K2
Conditions: Carboxylation Level;   Vitamin K-dependent Proteins
Interventions: Dietary Supplement: placebo;   Dietary Supplement: vitamin K1;   Dietary Supplement: vitamin K2
14 Completed Dose-Finding Study for Vitamin K2 in Human Volunteers
Condition: Vitamin K-Status
Interventions: Dietary Supplement: no vitamin K;   Dietary Supplement: 10 mcg Vitamin K for 3 months daily;   Dietary Supplement: 20 mcg Vitamin K for 3 months daily;   Dietary Supplement: 45 mcg Vitamin K for 3 months daily;   Dietary Supplement: 90 mcg Vitamin K for 3 months daily;   Dietary Supplement: 180 mcg Vitamin K for 3 months daily;   Genetic: 360 mcg Vitamin K for 3 months daily
15 Completed Vitamin D Supplement Study for Adolescents
Conditions: Vitamin D Deficiency;   Overweight;   Obesity
Interventions: Dietary Supplement: 2000 IU Vitamin D3 daily supplement;   Dietary Supplement: 400 IU Vitamin D3 supplement
16 Unknown † Vitamin D Replacement After Kidney Transplant
Conditions: Kidney Transplantation;   Vitamin D Deficiency
Intervention: Dietary Supplement: vitamin D3
17 Completed
Has Results 		Comparison of Efficacy of Vitamin D and Vitamin D-calcium Fortified Yogurt Drink in Diabetic Patients
Condition: Type 2 Diabetes
Interventions: Dietary Supplement: plain yogurt drink;   Dietary Supplement: vitamin D fortified yogurt drink;   Dietary Supplement: vitamin D-calcium yogurt drink
18 Active, not 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
19 Recruiting Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation
Condition: Vitamin D Deficiency
Interventions: Drug: vitamin D3 1000 IU orally daily for 5 months;   Drug: vitamin D3 3000 IU orally daily for 5 months;   Drug: vitamin D3 5000 IU orally daily for 5 months;   Drug: Placebo orally daily for 5 months
20 Recruiting Vitamin D Supplementation and Metabolism in Vitamin D Deficient Elderly
Conditions: Vitamin D Deficiency;   Metabolic Syndrome
Interventions: Dietary Supplement: RDA Vitamin D3 only;   Dietary Supplement: Vitamin D2/3 Repletion only;   Other: Vitamin D2/3 Repletion + AEX;   Other: Vitamin D2/3 Repletion + RT

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† Indicates status has not been verified in more than two years
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