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363 studies found for:    Open Studies | "Vitamins"
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Rank Status Study
1 Recruiting Determination of Vitamin D Dose to Maintain Sufficiency Amongst Indian and Malay Women in the Tropics
Condition: Vitamin D Deficiency
Intervention: Drug: Vitamin D3
2 Recruiting Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers
Condition: Vitamin D Deficiency
Intervention: Other: Blood draw
3 Not yet recruiting Effects of Vitamin D Fortification on Vitamin D Metabolite Profiles and Status in Vitamin D Insufficient Individuals
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Rooibos Iced-Tea (Control);   Dietary Supplement: Rooibos Tea - Vitamin D3;   Dietary Supplement: Rooibos Tea- Vitamin D3 & Calcium
4 Recruiting The GLOBAL Vitamin D Study. A Genomic, Transcriptomic, Proteomic and Metabolomic Approach
Condition: Vitamin D Deficiency
Interventions: Drug: Cholecalciferol;   Drug: Placebo
5 Recruiting Vitamin D Status and Immune Function
Condition: Vitamin D Deficiency
Intervention: Other: In vivo immunity model
6 Not yet recruiting Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes
Conditions: Vitamin D Deficiency;   Vitamin D Insufficiency
Interventions: Dietary Supplement: Vitamin D;   Other: Placebo;   Other: Standard of Care
7 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
8 Recruiting The Effect of Vitamin D Supplementation on Cardiovascular Risk Factors
Condition: Vitamin D Deficiency
Interventions: Drug: Cholecalciferol;   Drug: Placebo
9 Recruiting An Evaluation of the Effect of Vitamin D Supplementation on the Cognitive Function of Older Subjects With Low Levels of This Vitamin
Condition: VITAMIN D DEFICIENCY
Intervention: Drug: Vitamin D
10 Recruiting Effects of Vitamin D Insufficiency in Man
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D2;   Dietary Supplement: Vitamin D3
11 Recruiting Personalized Vitamin D Supplementation in European and African Americans
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D
12 Recruiting Vitamin D Levels Following Topical Application of Vitamin D Ointment
Condition: Vitamin D Deficiency
Intervention: Drug: Vitamin D3
13 Recruiting Vitamin D Supplementation in Warfighters
Condition: Vitamin D Deficiency Disease
Intervention: Dietary Supplement: Vitamin D3
14 Recruiting Topical Delivery of Vitamin D3 as Vitamin D Supplementation
Condition: Vitamin D Deficiency
Intervention: Drug: topical vitamin D3 in intervention group
15 Not yet recruiting Evaluation of a Transdermal Vitamin D3 Delivery System, D3forME
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Transdermal D Patch;   Dietary Supplement: Oral vitamin D3;   Dietary Supplement: Placebo patch;   Dietary Supplement: Oral placebo
16 Recruiting Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens
Condition: Vitamin D Deficiency
Interventions: Dietary Supplement: Vitamin D and calcium;   Dietary Supplement: Vitamin D;   Dietary Supplement: Calcium;   Dietary Supplement: Placebo
17 Recruiting High Dose Vitamin D Replacement in Patients Undergoing Hematopoietic Stem Cell Transplantation
Condition: Vitamin D Deficiency
Intervention: Drug: Vitamin D
18 Not yet recruiting Empirical Comperative Study Of Variation Blood Level Antibody Vitamin D at Different Groups Of Patients Compared Healthy Peoples
Condition: Vitamin D Deficiency
Intervention: Other: Blood samples
19 Recruiting Efficacy of Biofortified Maize to Improve Maternal and Infant Vitamin A Status
Condition: Vitamin A Deficiency
Interventions: Dietary Supplement: Conventional white maize;   Dietary Supplement: Provitamin A carotenoid biofortified maize;   Dietary Supplement: Preformed vitamin A fortified maize
20 Not yet recruiting Using Stable Isotope Techniques to Monitor and Assess the Vitamin A Status of Children Susceptible to Infection
Condition: Vitamin A Deficiency
Intervention: Dietary Supplement: Mega-dose of vitamin A supplement

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Study has passed its completion date and status has not been verified in more than two years.