Vitamin D Deficiency: all 784 studies

Page 1 of 8. Open to participants first (61), then studies with results posted, then the rest; newest registration first within each.

• The Effectiveness of a Weight-dependent Algorithm for Dosing Vitamin D.Not yet recruitingNCT07876843Not applicable
• Vitamin D Status and Its Influencing Factors in Zhejiang Province: A Multicenter Cross-Sectional StudyEnrolling by invitationNCT07866391
• Vitamin D Status and Clinical Outcomes in Locally Advanced Cervical CancerRecruitingNCT07743918
• Vitamin D Status and Asthma Control, Pulmonary Function, and Oxidative Stress in Adults With Bronchial AsthmaNot yet recruitingNCT07733635
• Vitamin D Status and Lipid Profile in Obese Adults With Type 2 DiabetesNot yet recruitingNCT07729553
• Effect of Systemic Vitamin D on Dental Implant OsseointegrationRecruitingNCT07684404Not applicable
• Vitamin D2 vs Vitamin D2 Plus Calcitriol in Cholestatic Children With Vitamin D DeficiencyRecruitingNCT07670611Phase 4
• Effects of High-Dose Vitamin D on Hormones, Neuromuscular Function, Cognition, and Body Composition in AthletesRecruitingNCT07641075Not applicable
• The Effect of Vitamin D Supplementation on the Anti-inflammatory Response in Periodontal DiseasesRecruitingNCT07636733Not applicable
• Effect of Vitamin D Supplementation on Brain Waves in Female Major Depressive Disorder Patients With Hypovitaminosis DEnrolling by invitationNCT07579078Not applicable
• ALPCO 25(OH) Vitamin D CLIA Kit - Fresh Versus Frozen Serum and Plasma Stability StudyEnrolling by invitationNCT07565064
• The Role of Urinary RhoA, NGF, and BDNF Levels in Overactive Bladder and Vitamin D DeficiencyNot yet recruitingNCT07513363Not applicable
• Association Between Benign Paroxysmal Positional Vertigo and Vitamin D Deficiency .RecruitingNCT07491965
• Bone Myoregulation Reflex and Postural Control in Vitamin D DeficiencyRecruitingNCT07435935
• Is There a Benefit From Addition of Exercise in Diabetic Patients With ED Who Complain Low Vitamin D?RecruitingNCT07366970Not applicable
• High-Dose vs Standard Ergocalciferol for Vitamin D Normalization in Aggressive Non-Hodgkin LymphomaNot yet recruitingNCT07366450Not applicable
• Effects of Different Vitamin D3 Formulations in Vitamin D-Deficient AdultsRecruitingNCT07317830Not applicable
• Evaluating Response to Vitamin D3 and K2 Supplementation in Healthcare PersonnelRecruitingNCT07199829Not applicable
• Bone Outcomes, Obesity, Sunlight, and Trauma in ChildrenRecruitingNCT07143552
• Effect of Combined Probiotics and Vitamin D on Symptoms of Allergic RhinitisRecruitingNCT07115342Not applicable
• Effectiveness of a Modified Cost-Effective Dietary Plan in Promoting Weight Loss and Preservation of Lean Body Mass in Patients After Bariatric SurgeryNot yet recruitingNCT07111767Not applicable
• Effect of Vitamin D3 Supplementation on Brain Waves in Male Epileptic Patients With Hypovitaminosis DRecruitingNCT07096414Not applicable
• Effect of Vitamin D3 Supplementation on Cardiac Autonomic Nerve Function in Male Epileptic Patients With Hypovitaminosis DRecruitingNCT07085598Not applicable
• Effect of Vitamin D3 Supplementation on Cardiac Autonomic Nerve Function in Male Parkinson's Disease Patients With Hypovitaminosis DRecruitingNCT07084597Not applicable
• Effect of Vitamin D3 Supplementation on Symptomatic Uterine Fibroid in Women With Vitamin D DeficiencyRecruitingNCT07012161Early Phase 1
• Investigating the Relationship Between Temporal Bone CT, Bone Density, and Hearing Loss in Otosclerosis PatientsRecruitingNCT06830187
• Challenges in Achieving Adequate Dietary Status of WomenEnrolling by invitationNCT06745817
• Study to Document the Phenomenon of Vitamin D Deficiency and Its Added Value in Patients with Low-energy Osteoporotic Hip Fracture, in Daily Practice in Greece.RecruitingNCT06643650
• Vitamin D in Dialysis Patients - Diagnostic and Therapeutic ManagementRecruitingNCT06571344
• Serum Vitamin D Status in Critically Ill Children With Acute Respiratory InfectionsNot yet recruitingNCT06547749
• Prospective Monocentric Registry of Patients Undergoing Vitamin D Treatment at San Raffaele HospitalRecruitingNCT06481111
• Effect of Vitamin D Supplementation on Mental Health: An Exploratory Study on A University Students Suffering From Vitamin D DeficiencyNot yet recruitingNCT06458686Phase 1/2
• Vitamin A Supplementation in Allogeneic Stem Cell Transplantation.RecruitingNCT06450925Phase 2
• REstoration of VItamin D in Pulmonary Arterial HypertensionNot yet recruitingNCT06258850Phase 4
• The High Initial Dose of Monitored Vitamin D Supplementation in Preterm Infants.Not yet recruitingNCT06199102Not applicable
• Vitamin D Supplementation in Pediatrics. Oral or Parenteral! D2 or D3Not yet recruitingNCT06176157Phase 4
• Cholecalciferol and Calcifediol Are Both Useful to Improve Vitamin D Serum LevelsRecruitingNCT06138249Not applicable
• Vitamin D Levels in Neonatal Umbilical Cord Blood: Factors and Prognostic AnalysisNot yet recruitingNCT06111066
• Estimation of the Dietary Requirement for Vitamin D in Ethnic GroupsRecruitingNCT06067477Not applicable
• The Effectiveness of Vitamin D Supplementation in Patients With End-stage Knee OsteoarthritisRecruitingNCT05981534Not applicable
• Effect of Supplementation With ω-3 Fatty Acids, Vitamin D and Calcium in Patients With Acute Lymphoblastic Leukemia.RecruitingNCT05950204Not applicable
• Early Vitamin D3 Supplementation for Critically Ill PatientsRecruitingNCT05937789Not applicable
• Clinical Trial of Vit D and Calcium for Recurrent BPPVNot yet recruitingNCT05863949Not applicable
• Oral Vitamin D Supplementation Prevent Peritoneal Dialysis-related PeritonitisRecruitingNCT05860270Phase 4
• Vit D and Peripheral Neuropathy in Taxane Naive PatientsNot yet recruitingNCT05852496Phase 2
• Resistive Exercise Versus HIIT on Calcium and Vitamin DEnrolling by invitationNCT05795504Not applicable
• Effects of Vitamin D on the Behaviours, Mental, and Physical Health of PrisonersRecruitingNCT05724316Not applicable
• Beneficial Effects of Vitamin D Combined With Oral Iron Supplementation in Patients With Chronic Heart Failure and Iron DeficiencyNot yet recruitingNCT05702970Phase 4
• Vitamin D for Critically Traumatic PatientsRecruitingNCT05449522Not applicable
• Dietary Challenges in the Population of Nursing Homes' ResidentsEnrolling by invitationNCT05389618
• Menier's Disease - Bone Density StudyNot yet recruitingNCT05322538Not applicable
• Vitamin D Insufficiency inVestigation Among hospitaLizeD InpatientsNot yet recruitingNCT05214040
• Validation of Prediction Model of Vitamin D DeficiencyRecruitingNCT05094388
• Vitamin D in School ChildrenRecruitingNCT05018988Not applicable
• Impact of Vitamin D Supplementation on the Rate of Pathologic Complete Response in Vitamin D Deficient PatientsRecruitingNCT04677816Phase 2
• Correlation Vitamin D Level to Endocrine Autoimmune Toxicity Due to Immune Checkpoint InhibitorsRecruitingNCT04615988
• Evaluation of the Clinical and Psychological Impact of Vitamin D Replacement in Adolescent Females at Risk for Polycystic Ovarian Syndrome (PCOS)RecruitingNCT04355572Not applicable
• High Dose Interval Vitamin D Supplementation in Patients With Inflammatory Bowel Disease Receiving Biologic TherapyRecruitingNCT04331639
• Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty ComplicationsRecruitingNCT04229368Not applicable
• Vitamin D and Health Status of British African-Caribbean WomenRecruitingNCT04179370
• Vitamin D and Polycystic Ovarian Syndrome (PCOS)RecruitingNCT03989778Phase 2
• Phase 3 Safety and Efficacy Study of CTAP101 Extended-release Capsules in Children With Secondary HyperparathyroidismTerminatedNCT05543928Phase 3Results posted
• Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin DCompletedNCT04865432Not applicableResults posted
• Evaluating the Effect of SOLIUS UV Light Source in Improving Vitamin D StatusCompletedNCT04780776Not applicableResults posted
• Mothers' Own Milk Optimization for Preterm Infants Project (MoMO PIP) Pilot StudyTerminatedNCT04629534Phase 4Results posted
• Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among VeteransCompletedNCT04621500Phase 2Results posted
• Comparing a Novel Phototherapy Kiosk to Oral Vitamin D SupplementationCompletedNCT04556136Not applicableResults posted
• Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery?CompletedNCT04323852Phase 4Results posted
• Daily Vitamin D for Sickle-cell Respiratory ComplicationsCompletedNCT04170348Phase 2Results posted
• Vitamin D Oral Replacement in AsthmaCompletedNCT03686150Not applicableResults posted
• Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOSCompletedNCT03644212Phase 4Results posted
• The Effect of Vitamin D and Exercise on Balance in Postmenopausal WomenCompletedNCT03608488Not applicableResults posted
• Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDITerminatedNCT03602261Phase 2Results posted
• Incidence of HANA Conditions in HIV-infected IndividualsCompletedNCT03483584Results posted
• Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) TrialTerminatedNCT03380091Phase 4Results posted
• Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsiaCompletedNCT03101150Phase 1/2Results posted
• Vitamin D to Improve Outcomes by Leveraging Early TreatmentCompletedNCT03096314Phase 3Results posted
• Blood Pressure in Blacks and Calcium (BBC) and Vitamin D StudyCompletedNCT03070483Phase 2Results posted
• Hypovitaminosis D in Neurocritical PatientsCompletedNCT02881957Phase 2/3Results posted
• Efficacy of Calcifediol Supplementation in Asthma Control in Asthmatic Patients With Vitamin D Deficiency (ACViD)CompletedNCT02805907Phase 4Results posted
• To Study the Nutri-Genomic Response of Vit-D Supplementation in African-AmericansCompletedNCT02802449Not applicableResults posted
• Topical Delivery of Vitamin D3 as Vitamin D SupplementationCompletedNCT02735200Phase 2Results posted
• Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic FibrosisCompletedNCT02613884Phase 2Results posted
• Cholecalciferol in Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D DeficiencyCompletedNCT02553447Not applicableResults posted
• The Effects of Vitamin D on Angiogenic Factors in Women With Polycystic Ovary SyndromeCompletedNCT02460380Phase 4Results posted
• Calcichew D3 Preference Study in Participants Eligible for Calcium and Vitamin D Supplementation.CompletedNCT02457247Phase 4Results posted
• Rapid Normalization of Vitamin D in Critically Ill Children: A Phase II Dose Evaluation Randomized Controlled TrialCompletedNCT02452762Phase 2Results posted
• Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in MongoliaCompletedNCT02395081Not applicableResults posted
• Personalized Vitamin D Supplementation in European and African AmericansCompletedNCT02362269Not applicableResults posted
• The Effect of Vitamin D Supplementation Among Overweight Jordanian Women With Polycystic Ovary Syndrome (PCOS)CompletedNCT02328404Phase 3Results posted
• Extension Study of CTAP101-CL-3001 or CTAP101-CL-3002CompletedNCT02282813Phase 3Results posted
• Trial of High Dose Vitamin D in Patient's With Crohn's DiseaseTerminatedNCT02208310Phase 4Results posted
• Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese YouthCompletedNCT02168660Phase 2Results posted
• Study To Understand Fall Reduction and Vitamin D in YouTerminatedNCT02166333Not applicableResults posted
• Treatment of Vitamin D Deficiency in Intestinal Rehabilitation Clinic Patients With a Portable Ultraviolet B LampCompletedNCT01930539Not applicableResults posted
• Ultraviolet Light And Vitamin D In Subjects With Fat Malabsorption Or After Gastric Bypass SurgeryCompletedNCT01910792Not applicableResults posted
• Cholecalciferol Supplementation for Sepsis in the ICUCompletedNCT01896544Phase 3Results posted
• Prevention of Vitamin D Deficiency Following Pediatric CHD Surgery: a Phase II Dose Evaluation Randomized Controlled Trial Comparing Usual Care With a High Dose Pre-operative Supplementation Regimen Based on the Institute of Medicine Daily Upper Tolerable Intake LevelCompletedNCT01838447Phase 2Results posted
• Vitamin D Levels in Frail Elderly Patients With a Hip FractureCompletedNCT01816711Results posted
• Vitamin D and Vascular Health in ChildrenCompletedNCT01797302Not applicableResults posted

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