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Results for “Vitamin D Supplementation”

740 trials

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Showing 20 of 740 results

Not applicableUnknownNCT04778865
What this trial is testing

Effect of Treatment for Vitamin D Deficiency on Thyroid Function and Autoimmunity in Hashimoto's Thyroiditis.

Who this might be right for
Hashimoto DiseaseTreatment LevothyroxineVitamin D Deficiency
Universidad de Valparaiso 50
Large-scale testing (Phase 3)Study completedNCT01600430
What this trial is testing

Vitamin D Supplementation for Extremely Preterm Infants

Who this might be right for
Vitamin D DeficiencyPreterm InfantsBronchopulmonary Dysplasia
University of Alabama at Birmingham 100
Not applicableLooking for participantsNCT06642428
What this trial is testing

Effect of Vitamin D Supplementation on the Efficacy and Adverse Effects of Neoadjuvant Therapy in Patients with Breast Cancer

Who this might be right for
Vitamin DNeoadjuvant TherapyBreast Cancer+3 more
Jiuda Zhao 140
Post-approval studies (Phase 4)Study completedNCT04952857
What this trial is testing

Short Term, High Dose Vitamin D Supplementation in Moderate to Severe COVID-19 Disease

Who this might be right for
Covid19
Post Graduate Institute of Medical Education and Research, Chandigarh 90
Not applicableUnknownNCT04025489
What this trial is testing

Vitamin D Supplementation on Surrogate Markers of Ageing, Ageing Genes, Glycemic and Metabolic Markers in North India

Who this might be right for
Vitamin D SupplementationPreDiabetesAging
Diabetes Foundation, India 200
Not applicableStudy completedNCT02495584
What this trial is testing

D-Light Intervention

Who this might be right for
25-hydroxyvitamin D Concentration (Vitamin D Status)
University of Ulster 52
Large-scale testing (Phase 3)Study completedNCT04641195
What this trial is testing

Vitamin D and Zinc Supplementation for Improving Treatment Outcomes Among COVID-19 Patients in India

Who this might be right for
COVID-19
Harvard School of Public Health (HSPH) 181
Large-scale testing (Phase 3)Study completedNCT05306704
What this trial is testing

High-Dose Vitamin D3 Supplementation in the Treatment of Human Immune Deficiency Virus Patients Trial

Who this might be right for
HIV-1-infectionHypovitaminosis D
University of the Punjab 95
Very early researchUnknownNCT04309058
What this trial is testing

Observation of the Effect of Vitamin D Supplementation on Chronic Course of Patients With Ulcerative Colitis Based on Vitamin D Receptor Fok I Gene Polymorphism

Who this might be right for
Ulcerative ColitisVitamin D DeficiencyVitamin D Supplement
Second Affiliated Hospital of Wenzhou Medical University 100
Large-scale testing (Phase 3)Study completedNCT01585051
What this trial is testing

Effect of Vitamin D Supplementation on Blood Pressure and HbA1c Levels in Patients With T2D

Who this might be right for
Diabetes Mellitus Type 2
Kantonsspital Baselland Bruderholz 51
Not applicableNot Yet RecruitingNCT07356440
What this trial is testing

Effect of the Consumption of Cookies Enriched With Plant Proteins and of a Vitamin D Supplement on the Progression of Sarcopenia in the Elderly

Who this might be right for
Sarcopenia in ElderlySarcopeniaNutritional Intervention+4 more
University of Udine 74
Not applicableStudy completedNCT02333682
What this trial is testing

Pharmacokinetics of Calcifediol and Cholecalciferol

Who this might be right for
Osteoporosis
DSM Nutritional Products, Inc. 93
Not applicableStudy completedNCT01079923
What this trial is testing

Pilot Pharmacokinetic Study of Daily Versus Monthly High-Dose Cholecalciferol Supplementation

Who this might be right for
Healthy Volunteers
Mayo Clinic 40
Not applicableUnknownNCT01672047
What this trial is testing

Effect of Vitamin D Supplementation on Coronary Calcification and Parathyroid Hormone in CKD Patients

Who this might be right for
Chronic Kidney DiseaseVitamin D Deficiency
Peking University People's Hospital 350
Early research (Phase 1)Ended earlyNCT01816555
What this trial is testing

Vitamin D3 (Vit D3) Supplementation and T Cell Immunomodulation in Patients With Newly Diagnosed Operative Invasive Ductal Breast Carcinoma

Who this might be right for
Newly Diagnosed Operative Invasive Ductal Breast Carcinoma Stage I-II
Medical University of South Carolina 1
Not applicableActive Not RecruitingNCT06452082
What this trial is testing

Retrospective Observational Study on the Risk in Developing Long-COVID Syndrome and in Contracting SARS-CoV-2 Infection After COVID-19 Vaccination in Relation to Vitamin D3 Supplementation

Who this might be right for
Vitamin d DeficiencyCOVID-19Long COVID
IRCCS San Raffaele 200
Testing effectiveness (Phase 2)Study completedNCT03264625
What this trial is testing

The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis

Who this might be right for
Peritoneal Dialysis-associated PeritonitisVitamin D Deficiency
Peking University First Hospital 60
Not applicableStudy completedNCT01747720
What this trial is testing

Vitamin D and Mammographic Breast Density

Who this might be right for
Breast Cancer
CHU de Quebec-Universite Laval 405
Not applicableStudy completedNCT05706259
What this trial is testing

A Comparative Dissolution and Absorption Study of an Orodispersible Powder, Chewable Tablet and Soft Gel Capsule Vitamin D3 Supplementation

Who this might be right for
Vitamin D Deficiency
Liaquat University of Medical & Health Sciences 40
Not applicableUnknownNCT03534674
What this trial is testing

Vitamin D3 Supplementation for AlloHSCT-RCT

Who this might be right for
Vitamin D Deficiency
University of British Columbia 84
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