Vitamin D Deficiency: all 784 studies

Page 3 of 8. Open to participants first (61), then studies with results posted, then the rest; newest registration first within each.

• Vitamin D Levels in Non-immediate Drug Hypersensitivity Case-control StudyCompletedNCT06263140
• The Role of Vitamin D in Amelioration of Oral Lichen Planus and Its Effect on Salivary IFN-γ LevelCompletedNCT06204796Phase 4
• Vitamin D Sulfates in BreastmilkCompletedNCT06203041Not applicable
• Hypovitaminosis D and "Metabolic" Inflammatory Status in Patients With ObesityCompletedNCT06115356
• Physical Exercise and Diet Management in Vitamin D Deficient FemalesCompletedNCT06114381Not applicable
• The Effect of UV-C Enriched Foods on Vitamin D DeficiencyCompletedNCT06098820Not applicable
• Vitamin D3-enhanced Eggs in Preschool ChildrenCompletedNCT06096194Not applicable
• The Effect of Vitamin D3 Therapy on Vitamin D Status in Pregnant Women With Vitamin D Deficient and InsufficientActive, not recruitingNCT06054919Phase 2/3
• Vitamin D Deficiency As a Risk Factor for the Development and Malignant Transformation of Oral Lichen PlanusCompletedNCT06033105
• Study on Clinical Value of Vitamin D in Recurrent Spontaneous AbortionCompletedNCT06002035
• The Effect Vitamin D on the Recovery Rate of Bell PalsyCompletedNCT05997199
• Vitamin D and Adipose Tissue: a Complex RelationshipCompletedNCT05957692
• Cholecalciferol Supplementation in Hemodialysis PatientsCompletedNCT05922696Phase 2/3
• Supplementation and Depressive Symptomatology Incidence Among Saudi Arabian AdultsCompletedNCT05916053Not applicable
• Vitamin D Status Among Infertile Women in SwedenCompletedNCT05848349
• The Cohort Study of the Correlation Between Serum 25(OH)D Level and Pregnancy OutcomeStatus unknownNCT05824897
• Effects of High Intensity Statin Therapy on Steroid Hormones and Vitamin D in Type 2 Diabetic MenCompletedNCT05806723Phase 4
• The Genetic Effects on Vitamin D SupplementationStatus unknownNCT05802433Not applicable
• A Comparative Dissolution and Absorption Study of an Orodispersible Powder, Chewable Tablet and Soft Gel Capsule Vitamin D3 SupplementationCompletedNCT05706259Not applicable
• Randomized Trial of Enteral Vitamin D Supplementation in Infants < 28 Weeks Gestational Age or <1000 Grams Birth WeightActive, not recruitingNCT05694689Not applicable
• Vitamins D and K Effects on Vascular Function in Obese Adults.Status unknownNCT05689632Not applicable
• ETOL-Elderly Study of the Efficiency of the Innovative Food Supplement in Elderly AdultsCompletedNCT05661006Not applicable
• Vitamin D Deficiency With Selected Vitamin D Receptor Gene Polymorphism in Gestational HypertensionActive, not recruitingNCT05659173
• Effects of Vitamin D on Cardiovascular Health in Black WomenCompletedNCT05656742Not applicable
• Peripheral Immunological Effects of High-dose Vitamin D Treatment in Healthy SubjectsCompletedNCT05654818Not applicable
• Effects of Stoss Therapy of Vitamin D3 on Peri-operative Outcomes in Patients Receiving General SurgeryWithdrawnNCT05650268Not applicable
• Peri-operative Vitamin D Therapy for HepatectomyStatus unknownNCT05650151Not applicable
• Effect of Vitamin D Supplementation on Vedolizumab Response in Patients With Ulcerative ColitisCompletedNCT05649462
• Magnesium and Vitamin D Combination for Post-COVID SyndromeCompletedNCT05630339Not applicable
• Effect of Single High Dose of Cholecalciferol on Serum Metabolites of Vitamin DCompletedNCT05591170Phase 4
• Relationship Between Serum Vitamin D and Outcomes of Liver Transplantation in Cirrhotic Patients Undergoing Liver Transplantation and Effects of Vitamin D Supplementation in Post-transplant PeriodStatus unknownNCT05568836Phase 1/2
• Effects of Vitamin D-Enriched Mushrooms on Vitamin D Status and Immune Function and Inflammatory Status in AdultsCompletedNCT05559112Not applicable
• A Study on Prevention Strategies for CKD-SHPT and Related Complications Based on General Vitamin D SupplementationStatus unknownNCT05549154Not applicable
• Vitamin D Deficiency and Body Composition in the Patients With HemophiliaCompletedNCT05517070
• Vitamin D Supplementation StudyCompletedNCT05506696Not applicable
• The Effects of a Sublingual Sprayable Microemulsion of Vitamin D on Inflammatory Markers in COVID-19 PatientsCompletedNCT05502068Not applicable
• Vitamin D, Oxidative Stress and Inflammation in HemodialysisCompletedNCT05460338Phase 2/3
• ViDES Trial (Vitamin D Extra Supplementation)Active, not recruitingNCT05459298Not applicable
• Impact of Vitamin D Supplementation on COVID-19 Vaccine Response and IgG Antibodies in Deficient Women.CompletedNCT05447065Not applicable
• A Study of Fixed Dose Versus Serum Level-Based Titration Regimen of Vitamin D Supplementation in Dialysis PatientsCompletedNCT05434377Not applicable
• Effects of Vitamin D Supplementation in Adolescents With Asthma, Obesity and Vitamin D Deficiency.Active, not recruitingNCT05431920Not applicable
• Effect Of Laparoscopic Sleeve Gastrectomy on Vitamin D, Parathormone and Calcium LevelsCompletedNCT05430932Not applicable
• Impact of Vitamin D3 Supplementation in Non-Sjogren Dry Eye Patients With Low Serum Vitamin D LevelCompletedNCT05425914Phase 3
• Vitamin D Levels in Umbilical Cord and It's Impact on Infant and Children's Health (VITADi Study)Status unknownNCT05419973
• Oral Health and Vitamin D in Stroke PatientsCompletedNCT05418335
• Calcitriol Supplementation in COVID-19 PatientsStatus unknownNCT05415254Not applicable
• Vitamin D and Microvascular Function in Postmenopausal WomenCompletedNCT05408273
• Impact of COVID-19 Vaccination on Serum 25-hydroxyvitamin D LevelCompletedNCT05398939
• Evaluation Of The Effect Of L. Casei DG® On Vitamin D Absorption In Patients Under Vitamin D Supplementation.Status unknownNCT05394207Not applicable
• The Effect of Vitamin D3 Therapy in Post Menopausal Women and Assessment of Changes in Bone Mineral Density After Orally Vitamin D3 AdministrationStatus unknownNCT05389943Phase 1
• Electronic Medical Records to Increase Adherence to the Choosing Wisely RecommendationsCompletedNCT05385445Not applicable
• Vitamin D Supplementation and Clinical Outcomes in Severe COVID-19 PatientsStatus unknownNCT05384574Not applicable
• Effects of Vitamin D Supplementation on Obesity, Inflammatory and Metabolic MarkersCompletedNCT05376865Not applicable
• Prediction Model of Vitamin D DeficiencyCompletedNCT05376774
• Effect of Vitamin D and Denosumab on Bone Remodelling in Women With Postmenopausal OsteoporosisCompletedNCT05372224Not applicable
• Synergistic Effect of Vitamin D Supplementation in Patients With Vitiligo and Vitamin D DeficiencyCompletedNCT05364567Not applicable
• Frequency of Hyperparathyroidism in Postmenopausal Osteoporosis and Its TreatmentCompletedNCT05347082Not applicable
• Antiresorptive Effect of Treatment With Risedronate and Vitamin D in Postmenopausal PatientsCompletedNCT05346419Not applicable
• 25-Hydroxyvitamin D Levels in Patients With Periodontitis (Stage III)CompletedNCT05343273
• PREDIN: Pregnancy and Vitamin D Intervention StudyCompletedNCT05329428Not applicable
• High-Dose Vitamin D3 Supplementation in the Treatment of Human Immune Deficiency Virus Patients TrialCompletedNCT05306704Phase 3
• Efficacy of Intensive Cholecalciferol Monitoring and Supplementation on Serum vitD Levels in Pediatric Patients With CFCompletedNCT05276960Phase 4
• Effect of Vitamin D Supplement on Disease Activity in SLECompletedNCT05260255Not applicable
• GraviD-child Follow-up of the Children´s Health, Growth and Development Within the GraviD-studyCompletedNCT05228925
• COVID-19 and Vitamin D: Length of Hospital Stay and MortalityCompletedNCT05221983
• Prevention of Postoperative Hypocalcemia of Oral Vitamin D Supplementation Before Total ThyroidectomyCompletedNCT05216419Phase 4
• Correlation Between Serum Vitamin D3 and Incidence of Uterine LeiomyomaStatus unknownNCT05151393
• Vitamin D Effect on A Disintegrin-like And Metalloprotease Thrombospondin1 Motif 13& Interleukin 6 in LeukemiaCompletedNCT05149339Phase 1/2
• Vitamin D Supplementation and Glycemic Control Improvement Among Type 1 Diabetic ChildrenCompletedNCT05141968Not applicable
• Vitamin D Status and Bone Metabolism Status in Children With Congenital Epidermolysis BullosaStatus unknownNCT05141838Phase 4
• Vitamin D Supplementation and Improvement of PCOS Therapy and IVF Outcomes in Infertile Saudi WomenStatus unknownNCT05106712Not applicable
• Comparative Pharmacokinetics of Two Different Oral Delivery Systems of CholecalciferolStatus unknownNCT05104970Phase 2
• Vitamin D Deficiency in Adults Following a Major Burn InjuryCompletedNCT05084248Phase 4
• Open Label Randomized Clinical Study to Promote a Healthy Lifestyle in Medical StudentsCompletedNCT05073029Not applicable
• Effect of Exercise on Vitamin d in ObeseCompletedNCT05066490Not applicable
• Connective Tissue Diseases and Vitamin D DeficiencyStatus unknownNCT05065814Not applicable
• Vitamin D Level and Pain Type in CoccygodyniaStatus unknownNCT05047393
• Effect of Exercise Intensity on Vitamin DCompletedNCT05024110Not applicable
• Vitamin D Supplementation for the Prevention of Acute Respiratory Infections: a RCT in Young Finnish MenCompletedNCT05014048Not applicable
• Vitamin D3 Supplementation for Vitamin D Deficiency in Rotator Cuff Repair SurgeryStatus unknownNCT05009498Not applicable
• Reference Interval of Vitamin D of Coastal Fishermen in Cox's Bazar District of BangladeshCompletedNCT04986319
• Nutrition, Immunity, and Covid-19 in Obese PeopleCompletedNCT04979065Phase 2
• The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 InfectionCompletedNCT04945577
• Prevalence of Vitamin D Deficiency in Pregnant Women and Their Fetus in North JordanCompletedNCT04944212
• Optimization of Blood Levels of 25(OH)-Vitamin D in African AmericansCompletedNCT04939792Early Phase 1
• Vitamin D Supplementation in Estonian ConscriptsCompletedNCT04939636Not applicable
• Absorption Kinetics and Efficacy of Vitamin D Enriched Supplements in Older Adults.CompletedNCT04935034Not applicable
• Vitamin D and Sleep Disorders in PregnancyCompletedNCT04918368
• Effect of Vitamin D Oral Supplementation in Poly Csytic Ovarian Women Resistant to Clomiphene CitrateStatus unknownNCT04916925Phase 1/2
• Vitamin D Supplementation in Intensive Care Unit PatientsCompletedNCT04915963Phase 3
• Vitamin D and Serum Calcium Level Insufficiency and Early Dental Implant FailureStatus unknownNCT04906161
• Effects of Vitamin D Supplementation on Depression and Inflammatory MarkersCompletedNCT04898725Not applicable
• Retinal Changes in Vitamin D DeficiencyCompletedNCT04891211Not applicable
• Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3CompletedNCT04885803Not applicable
• 30000 IU Per Week Vitamin D Treatment in PCOS PatientsCompletedNCT04840238Phase 2
• The Role of Vitamin D Supplementation on Pain in Women With Primary Dysmenorrhea and Hypovitaminosis DStatus unknownNCT04829487Not applicable
• Immunomodulating Effects of Supplementation With 25-OH Vitamin DCompletedNCT04822038Not applicable
• Vitamin D Replacement Using Oral Thin Film (OTF) Cholecalciferol in Patients Undergoing Hematopoietic Stem Cell TransplantationCompletedNCT04818957Not applicable
• Effect of Treatment for Vitamin D Deficiency on Thyroid Function and Autoimmunity in Hashimoto's Thyroiditis.Status unknownNCT04778865Not applicable
• 12 Weeks Vitamin D Supplementation and Physical Activity in PD Patients With DBSCompletedNCT04768023Not applicable

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