| Vitamin D and Microvascular Function in Postmenopausal Women (NCT05408273) | Rio de Janeiro State University | 2019-07-04 |
| Rapid Normalization of Vitamin D Deficiency in PICU (NCT03742505) | Children's Hospital of Eastern Ontario | 2019-06-17 |
| PK/PD of Vitamin D3 in Adults With CF (NCT03734744) | University of Southern California | 2019-06-17 |
| Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among Veterans (NCT04621500) | Medical University of South Carolina | 2019-06-04 |
| Vitamin D Can Increase Pathological Response of the Breast Cancer Patients Treated With Neoadjuvant Therapy (NCT03986268) | Florence Nightingale Hospital, Istanbul | 2019-05-10 |
| Vitamin D and Human Sperm DNA Fragmentation (NCT03829943) | Sanford Health | 2019-03-21 |
| High-dose Vitamin D Supplements in Older Adults (NCT03613116) | University of California, Davis | 2019-03-18 |
| Vitamin D Level and Its Relation to Pre-eclampsia and Eclampsia (NCT03882099) | Cairo University | 2019-03-17 |
| Relationship Between Serum Vitamin D Levels and Musculoskeletal Adverse Effects in Patients Using Isotretinoin (NCT04204304) | Ankara Training and Research Hospital | 2019-03-15 |
| Vitamin D Effect on A Disintegrin-like And Metalloprotease Thrombospondin1 Motif 13& Interleukin 6 in Leukemia (NCT05149339) | Zagazig University | 2019-03-01 |
| Vitamin D Deficiency and Effect of Its Supplementation on Interstitial Lung Diseases(ILD). (NCT04100226) | Cairo University | 2019-03-01 |
| Open Label Randomized Clinical Study to Promote a Healthy Lifestyle in Medical Students (NCT05073029) | Bogomolets National Medical University | 2019-02-10 |
| Vitamin D Oral Replacement in Asthma (NCT03686150) | IDeA States Pediatric Clinical Trials Network | 2019-01-30 |
| Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Birth Weight Infants (NCT03876704) | First Affiliated Hospital Xi'an Jiaotong University | 2019-01-29 |
| Helminth Infection During Pregnancy on Vitamin D Regulation: HELMVIT Study (NCT04324853) | Centre de Recherche Médicale de Lambaréné | 2019-01-28 |
| Treatment of Vitamin D Deficiency With Large Bolus Cholecalciferol (NCT04120064) | Parkview Medical Center | 2019-01-25 |
| Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2 (NCT03810261) | Institute of Nutrition, Slovenia (Nutris) | 2019-01-08 |
| The Influence of Food Matrix Delivery System on the Bioavailability of Vitamin D3 (NCT03783273) | University of Aarhus | 2019-01-08 |
| Serum and Semen Vitamin D Level With Semen Parameters (NCT03477136) | Assiut University | 2018-12-06 |
| Effect of Vitamin D3 and Omega-3FA on Leptin and HbA1C With Vitamin D Deficiency (NCT03735303) | Applied Science Private University | 2018-12-01 |
| Effect Of Laparoscopic Sleeve Gastrectomy on Vitamin D, Parathormone and Calcium Levels (NCT05430932) | Kafrelsheikh University | 2018-10-01 |
| 25-Hydroxyvitamin D Pharmacokinetic Study (NCT03401541) | Boston University | 2018-10-01 |
| Association Between Vitamin D and the Development of Uterine Fibroids (NCT03584529) | Second Affiliated Hospital of Wenzhou Medical University | 2018-09-15 |
| Association Between Vitamin D and the Risk of Uterine Fibroids (NCT03586947) | Second Affiliated Hospital of Wenzhou Medical University | 2018-09-15 |
| Endocrine and Menstrual Disturbances in Women With Polycystic Ovary Syndrome (PCOS) (NCT03652987) | St George's, University of London | 2018-09-05 |
| Correlation Between Maternal Vitamin D Level And Preterm Birth (NCT03638037) | Ain Shams Maternity Hospital | 2018-09-02 |
| Prognostic Value of Vitamin D Levels in Egyptian Females With Breast Cancer (NCT03594214) | Assiut University | 2018-09-01 |
| Maintenance Dosing of Vitamin D in Crohn's Disease (NCT03615378) | Cedars-Sinai Medical Center | 2018-08-30 |
| Prevalence of Deficiency of Vitamin D in Critically Ill Patients (NCT03639584) | National Taiwan University Hospital | 2018-08-23 |
| Vitamin D and Arterial Stiffness in Elderly (NCT03649802) | Texas Tech University Health Sciences Center | 2018-08-16 |
| The Effect of Vitamin D and Exercise on Balance in Postmenopausal Women (NCT03608488) | Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey | 2018-08-06 |
| Improving Functionality in Older People (NCT03611049) | Texas Tech University Health Sciences Center | 2018-08-01 |
| Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted Patients (NCT03403647) | Sheba Medical Center | 2018-07-15 |
| Vitamin D3-enhanced Eggs in Preschool Children (NCT06096194) | Instituto Nacional de Salud Publica, Mexico | 2018-07-15 |
| Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI (NCT03602261) | OPKO Health, Inc. | 2018-07-09 |
| Cholecalciferol on Hemodialysis Patients (NCT03602430) | Ain Shams University | 2018-07-01 |
| Absorption Kinetics and Efficacy of Vitamin D Enriched Supplements in Older Adults. (NCT04935034) | University College Dublin | 2018-07-01 |
| SUN LIGHT EXPOSURE AND VITAMIN D LEVEL IN NURSING HOME (NCT04469257) | Tokat Gaziosmanpasa University | 2018-06-27 |
| Vitamin D3 Supplementation for AlloHSCT-RCT (NCT03534674) | University of British Columbia | 2018-06-15 |
| Vitamin D for Muscle Metabolic Function in Cancer Cachexia (NCT03144128) | David Travis Thomas | 2018-05-23 |
| Vitamin D for Critically Traumatic Patients (NCT05449522) | National Taiwan University Hospital | 2018-05-01 |
| Vitamin D Deficiency Treatment Outcomes After Non-ST-Segment Elevation Myocardial Infarction (NCT03405207) | Isfahan University of Medical Sciences | 2018-05-01 |
| Effect of High-Dose Vitamin D3 in Smokers and Non-Smokers With and Without HIV (NCT03270709) | Emory University | 2018-04-11 |
| Incidence of HANA Conditions in HIV-infected Individuals (NCT03483584) | Chinese University of Hong Kong | 2018-04-06 |
| Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time (NCT03584256) | University of Ljubljana | 2018-04-05 |
| Vitamin D Status in Inflammatory Bowel Disease (NCT03496246) | Assiut University | 2018-04-01 |
| Immunomodulatory Vitamin D in Thalassemia (NCT03919812) | Universitas Padjadjaran | 2018-04-01 |
| High-dose Vitamin D3 in Pancreas Cancer (NCT03472833) | Medical University of Graz | 2018-04-01 |
| Vitamin D for Polycystic Ovary Syndrome Clomiphene Resistant Women (NCT04010942) | Ain Shams University | 2018-04-01 |
| Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study (NCT03070483) | Loyola University | 2018-03-25 |
| Effects of Vitamin D3 Supplementation on Antioxidant Enzymes Status in Vitamin D3 Deficient Asthma COPD Overlap (ACO) Patients (NCT03931889) | Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh | 2018-03-01 |
| Myocardial Function and Vitamin D Supplementation in Diabetes. (NCT03437421) | University of Avignon | 2018-02-04 |
| The D-BIICEP Study (NCT03253055) | University of Surrey | 2018-02-01 |
| Supplementation With Vitamin D to Patients With Heart Failure (D-Heart). (NCT03289637) | Linkoeping University | 2018-02-01 |
| Central Sensitization in Vitamin D Deficiency (NCT03420378) | Marmara University | 2018-01-28 |
| High vs Low Dose Vitamin D in Patients With Diabetic Peripheral Neuropathy (NCT04377399) | Federal State Budgetary Institution, V. A. Almazov Federal North-West Medical Research Centre, of the Ministry of Health | 2018-01-10 |
| Vitamin D Supplementation in Children (NCT03402698) | Children's Memorial Health Institute, Poland | 2018-01-09 |
| Vitamin D Supplementation for the Prevention of Acute Respiratory Infections: a RCT in Young Finnish Men (NCT05014048) | Tampere University | 2018-01-04 |
| Nutritional Deficiencies Preventive Treatment Prior to Laparoscopic Sleeve Gastrectomy (NCT02483026) | Hadassah Medical Organization | 2018-01-02 |
| Vitamin D Supplementation to Prevent Vitamin D Deficiency for Children With Epilepsy (NCT03536845) | King Saud University | 2018-01-01 |
| The Effect of Supplementation of Vitamin D Deficiency in Older People With Acute Hip Fracture: (NCT03213886) | Leonor Cuadra Llopart | 2018-01-01 |
| Impact of Vitamin D Supplementation in Patients With Multiple Sclerosis (NCT03385356) | University Medical Centre Maribor | 2017-12-19 |
| Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial (NCT03380091) | University of California, San Francisco | 2017-12-12 |
| The Effect of Vitamin D Supplementation on Psoriasis Severity (NCT03334136) | University Hospital of North Norway | 2017-11-24 |
| Vitamin D Supplementation and Tibia Fracture. Does it Improve Healing Rate? (NCT03232216) | Hospital del Trabajador de Santiago | 2017-11-21 |
| 'Palliative-D' Vitamin D to Palliative Cancer Patients (NCT03038516) | Region Stockholm | 2017-11-01 |
| A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT (NCT03176849) | Phoenix Children's Hospital | 2017-11-01 |
| The VITDALIZE Study: Effect of High-dose Vitamin D3 on 28-day Mortality in Adult Critically Ill Patients (NCT03188796) | Medical University of Graz | 2017-10-10 |
| Vitamin D Supplementation and Glycemic Control Improvement Among Type 1 Diabetic Children (NCT05141968) | Al-Azhar University | 2017-10-01 |
| The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis (NCT03264625) | Peking University First Hospital | 2017-09-30 |
| Relationship Between Body Composition, Food Consumption, and Micro and Macronutrients With Gene Expression in Breast Cancer (NCT04389424) | Instituto Jalisciense de Cancerologia | 2017-09-01 |
| Vitamin D and Immune Mechanisms of Hypertension in Type 2 Diabetics (NCT03348280) | Washington University School of Medicine | 2017-09-01 |
| Impact of Correction of Vitamin D Deficiency in Oxidative Stress in Patients With Prediabetes (VICOX) (NCT03356873) | Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran | 2017-09-01 |
| Vitamin D Supplementation in IBS (NCT03148288) | Beth Israel Deaconess Medical Center | 2017-09-01 |
| Vitamin D and Sleep Disorders in Pregnancy (NCT04918368) | Gaziosmanpasa Research and Education Hospital | 2017-08-20 |
| Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients (NCT03773809) | Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh | 2017-08-01 |
| Vitamin D Level and Risk of Infections in Cirrhotic Patients (NCT03391245) | Assiut University | 2017-08-01 |
| Follicular Fluid, Bioavailable Vitamin D and Embryo Quality Markers (NCT03073720) | ART Fertility Clinics LLC | 2017-07-26 |
| Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency. (NCT03158155) | Nancy Ahmed El Salmawy | 2017-07-15 |
| Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients (NCT03066817) | New York City Health and Hospitals Corporation | 2017-07-01 |
| Adults Nutrition as a Protective or Health-risk Factor (NCT03284840) | Institute of Nutrition, Slovenia (Nutris) | 2017-06-01 |
| Immunomodulating Effects of Supplementation With 25-OH Vitamin D (NCT04822038) | Coordinación de Investigación en Salud, Mexico | 2017-06-01 |
| Evaluation of Metabolic Predictors of Influenza Vaccine Immune Response in the Singapore Elderly Population - the DYNAMIC Trial (NCT03399357) | Tan Tock Seng Hospital | 2017-05-31 |
| Effects of Vitamin D Supplementation During a Non-surgical Treatment of Generalized Chronic Periodontitis (NCT03162406) | Cliniques universitaires Saint-Luc- Université Catholique de Louvain | 2017-05-18 |
| The Effect of Vitamin D on Fertility (NCT03890458) | Akdeniz University | 2017-05-01 |
| Monitored vs Standard Supplementation of Vitamin D in Preterm Infants (NCT03087149) | Princess Anna Mazowiecka Hospital, Warsaw, Poland | 2017-05-01 |
| Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes (NCT03151174) | Virginia Polytechnic Institute and State University | 2017-04-29 |
| Vitamin D to Improve Outcomes by Leveraging Early Treatment (NCT03096314) | Massachusetts General Hospital | 2017-04-27 |
| Omega 3 and Vitamin D Dosage in a Population With Moderate to High Risk of AMD (NCT04482465) | Universitaire Ziekenhuizen KU Leuven | 2017-04-20 |
| Preeclampsia Research on Vitamin D, Inflammation, & Depression (NCT03018132) | Cedars-Sinai Medical Center | 2017-04-01 |
| The Impact of Vitamin D Deficiency on Hypocalcaemia Following Total Thyroidectomy (NCT03063060) | Hillel Yaffe Medical Center | 2017-03-01 |
| Vitamin D Repletion and Maintenance in IBD: How Much and How Often (NCT03053414) | Cedars-Sinai Medical Center | 2017-02-20 |
| Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena? (NCT03035084) | King Faisal Specialist Hospital & Research Center | 2017-02-15 |
| Vitamin D Supplementation on Metabolic Syndrome Indicators Among Older Adults, Alborz Province, Iran (NCT03193944) | Alborz Medical University | 2017-02-10 |
| The Efficacy of Different Vitamin D Supplementation Delivery Methods (NCT03463642) | University of Wolverhampton | 2017-02-02 |
| Vitamin D Effect on Subarachnoid Hemorrhage (NCT03482843) | University Clinic Frankfurt | 2017-02-01 |
| Vitamin D Supplementation and Neurocognition (NCT03019120) | Rambam Health Care Campus | 2017-01-15 |
| Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes (NCT02212652) | Johns Hopkins University | 2017-01-01 |
| Uroflowmetry Results and Vitamin D Levels (NCT04405141) | Umraniye Education and Research Hospital | 2017-01-01 |
| 30000 IU Per Week Vitamin D Treatment in PCOS Patients (NCT04840238) | Semmelweis University | 2016-12-08 |