102 studies found for:    oh | Open Studies | "Vitamin D"
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Rank Status Study
1 Recruiting Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels
Condition: Vitamin D Deficiency
Interventions: Drug: ergocalciferol 2000 IU orally, daily;   Drug: ergocalciferol 25000 IU oraly every 2 weeks;   Drug: ergocalciferol 50000 IU orally every 4 weeks;   Drug: ergocal1000 IU & cholecal 1000 IU orally daily;   Drug: cholecalciferol 2000 IU orally daily;   Drug: Cholecalciferol 25000 IU orally every 2 weeks;   Drug: Cholecalciferol 50000 orally every 4 weeks;   Drug: placebo orally everyday
2 Unknown  Serum 25(OH)D Levels, Supplemental Vitamin D, and Parathyroid Hormone Levels in Premature Infants
Condition: Premature Infants
Interventions: Dietary Supplement: cholecalciferal;   Dietary Supplement: cholecalciferol
3 Recruiting Clinical Trial on the Use of 25-OH -D Vitamin in Haemodialysis Patients
Condition: Chronic Renal Failure
Intervention: Drug: 25-OH-D vitamin
4 Recruiting The Effect of a High-dose Oral Vitamin D3 Bolus on Serum 25(OH)D3 and Vitamin D Receptor Target Gene Expression
Conditions: Vitamin D Receptor Target Gene Expression;   Serum 25(OH)D Concentration
Intervention: Dietary Supplement: Vitamin D3
5 Recruiting Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function
Condition: Vitamin D Deficiency
Interventions: Drug: Vitamin D;   Drug: 25(OH)D3
6 Recruiting Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in Mongolia
Conditions: Pregnancy;   Vitamin D Deficiency
Interventions: Dietary Supplement: 600 IU Vitamin D3 in prenatal vitamin;   Dietary Supplement: 2000 IU Vitamin D3 in prenatal vitamin;   Dietary Supplement: 4000 IU Vitamin D3 in prenatal vitamin
7 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
8 Recruiting Vitamin D3 Supplementation in Pediatric IBD: Weely vs Daily Dosing Regimens
Condition: Inflammatory Bowel Disease (IBD)
Intervention: Dietary Supplement: Vitamin D-3
9 Not yet recruiting Personalized Vitamin D Supplementation in European and African Americans
Condition: Vitamin D Deficiency
Intervention: Dietary Supplement: Vitamin D
10 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)
11 Recruiting Effect of Vitamin D Supplementation on Coronary Calcification and Parathyroid Hormone in CKD Patients
Conditions: Chronic Kidney Disease;   Vitamin D Deficiency
Intervention: Drug: Vitamin D2
12 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
13 Unknown  Treatment Study of Vitamin D Deficiency in Adolescents
Condition: Vitamin D Deficiency
Intervention: Drug: Vitamin D3
14 Unknown  Influence of Vitamin D on Vascular Function in Adolescents and Young Adults With Type 1 Diabetes
Condition: Diabetes Mellitus, Type 1
Intervention: Dietary Supplement: Vitamin D
15 Recruiting Vitamin D Deficiency and Ovarian Reserve Among Infertile Patients
Condition: Infertility
Intervention:
16 Recruiting Vitamin D and Osteoporosis Prevention in Elderly African American Women
Condition: Determining if Vitamin D Can Decrease Bone Loss and Inhibit the Decline Physical Performance in Elderly African American Women.
Interventions: Dietary Supplement: Vitamin D 3;   Other: placebo
17 Unknown  Sleep Apnea Syndrome and Vitamin D
Condition: Obstructive Sleep Apnea-hypopnea Syndrome
Intervention: Drug: 25 OH vitamin D
18 Not yet recruiting Hip Arthroplasty and Vitamin D Status
Condition: Vitamin D Deficiency
Intervention: Other: No intervention
19 Recruiting The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile
Conditions: Cholesterol;   Vitamin D Deficiency
Interventions: Dietary Supplement: Oral Vitamin D3;   Radiation: Ultraviolet Light
20 Recruiting High Dose Vitamin D Study
Condition: Colorectal Cancer
Intervention: Drug: Vitamin D

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Indicates status has not been verified in more than two years