Vitamins: all 2,138 studies that test it

Page 9 of 22. Open to participants first (190), then studies with results posted, then the rest; newest registration first within each.

• Evaluation of Safety and Dosing of a Vitamin C Bundle for Sepsis Treatment in AfricaStatus unknownNCT04999137Phase 2
• Cholecalciferol Comedication in IBD - the 5C-studyCompletedNCT04991324Phase 3
• Vitamin E Efficacy in HI/HAWithdrawnNCT04984798Phase 2
• Maternal and Neonatal Benefits of Prophylactic Administration of Vitamin K Before Elective Cesarean SectionCompletedNCT04984083Not applicable
• Effect of Vitamin D in Patients With Diabetic Peripheral Neuropathy to Alleviate Pain and Improvement of SymptomsCompletedNCT04984044Not applicable
• Comparing the Effects of Vitamin E, Ursodeoxycholic Acid and Pentoxyfylline on Egyptian Non-alcoholic Steatohepatitis (NASH) PatientsCompletedNCT04977661Phase 4
• Comparison of Serum Calcium Level Between Preoperative Vitamin D and Non-vitamin D Regimen of Total Parathyroidectomy in End-stage Renal Failure Patients in Rajavithi HospitalCompletedNCT04967469Not applicable
• Vitamin D and Calcium Supplementation at Danish Nursing HomesCompletedNCT04956705Not applicable
• Short Term, High Dose Vitamin D Supplementation in Moderate to Severe COVID-19 DiseaseCompletedNCT04952857Phase 4
• Optimization of Blood Levels of 25(OH)-Vitamin D in African AmericansCompletedNCT04939792Early Phase 1
• Vitamin D Supplementation in Estonian ConscriptsCompletedNCT04939636Not applicable
• Hmong Microbiome ANd Gout, Obesity, Vitamin C (HMANGO-C)CompletedNCT04938024Not applicable
• Absorption Kinetics and Efficacy of Vitamin D Enriched Supplements in Older Adults.CompletedNCT04935034Not applicable
• Steroid, Thiamine and Ascorbic Acid for Comatose Out-of-hospital Cardiac Arrest SurvivorsCompletedNCT04921189Phase 2
• Cholecalciferol on Depressive Symptoms in Type 2 Diabetes Mellitus PatientsStatus unknownNCT04917458Phase 2
• 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 Supplementation on Outcome and Disease Activity.CompletedNCT04909931Not applicable
• Olfactory and Neurosensory Rehabilitation in COVID-19-related Olfactory DysfunctionStatus unknownNCT04900415Phase 2
• Effects of Vitamin D Supplementation on Depression and Inflammatory MarkersCompletedNCT04898725Not applicable
• High Doses Vitamin C and Tissular Repair in Surgical PatientsCompletedNCT04896359Not applicable
• Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3CompletedNCT04885803Not applicable
• Gemcitabine With Ascorbate Including AdolescentsWithdrawnNCT04877587Early Phase 1
• Oral Vitamin D Supplementation Combined With Phototherapy as a Treatment for VitiligoCompletedNCT04872257Not applicable
• Vitamin D and Pre Cachexia and Cancer Cachexia in Epithelial Ovarian CancerStatus unknownNCT04864431Not applicable
• The Effect of Cholecalciferol in Pre-frail ElderlyCompletedNCT04847947Phase 3
• Correlation Between Vitamin D and Symptoms Severity of Autonomic Nervous Mediated Syncope Child and it 's RAASStatus unknownNCT04844957Early Phase 1
• The Effect of Vitamin D Supplementation in Overweight and Obese Pregnant WomenCompletedNCT04841265Not 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
• Antioxidant Vitaminas and Hypertrophy Adaptations to Resistance TrainingCompletedNCT04828642Not applicable
• Vitamin D, Omega-3, and Combination Vitamins B, C and Zinc Supplementation for the Treatment and Prevention of COVID-19WithdrawnNCT04828538Not applicable
• Vitamin D Regulation of Gut Specific B Cells and Antibodies Targeting Gut Bacteria in Inflammatory Bowel DiseaseCompletedNCT04828031Phase 1
• Vitamin D and Cocaine AdministrationTerminatedNCT04826133Early Phase 1
• 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
• Preoperative IMRT With Concurrent High-dose Vitamin C and mFOLFOX6 in Locally Advanced Rectal CancerStatus unknownNCT04801511Phase 2
• Evaluation of the Effects of Calcitriol's in the Neurological Symptoms of Friedreich's Ataxia PatientsCompletedNCT04801303Phase 4
• High-dose Intravenous Vitamin C in Patients With Septic ShockStatus unknownNCT04796636Phase 1
• Is Involucrin Has a Role in Verruca Vulgaris? A Clinical and Immunohistochemical StudyCompletedNCT04793529Not applicable
• Vitamin D3 Levels in COVID-19 Outpatients From Western MexicoCompletedNCT04793243Not applicable
• The Effect of Phenolic Compounds in Osteoarthritis; a Nutritional InterventionCompletedNCT04783792Not applicable
• The Effect of High Dose Parenteral Ascorbic Acid On Microcirculation In SepsisCompletedNCT04773717Not applicable
• Temporal Profile of Serum Vitamin D Levels in Foot and Ankle Fusion SurgeryActive, not recruitingNCT04772196Early Phase 1
• Low and High Doses of Prophylactic Vitamin D in Prevention of Osteopenia of PrematurityCompletedNCT04768439Phase 2
• 12 Weeks Vitamin D Supplementation and Physical Activity in PD Patients With DBSCompletedNCT04768023Not applicable
• Effect of Maternal Vitamin D3 Supplementation on Iron Status During Pregnancy and Early InfancyCompletedNCT04764955Phase 3
• FLIO and the Influence of Oral Lutein Supplementation on Macular PigmentCompletedNCT04761341Phase 4
• The Effect of Probiotics and Vitamin D Supplementation on Sport Performance in MMA Athletes.Status unknownNCT04759729Not applicable
• Parenteral Ascorbic Acid Repletion in TransplantatIonWithdrawnNCT04756063Phase 4
• Efficacy of a Dietary Supplementation in Reducing Hospital Admissions for COVID-19. Randomized Clinical TrialCompletedNCT04751669Not applicable
• Efficacy and Safety of Calcifediol vs Placebo in Subjects With Vitamin D DeficiencyCompletedNCT04735926Phase 2/3
• The Effect of Probiotic Supplementation on SARS-CoV-2 Antibody Response After COVID-19CompletedNCT04734886Not applicable
• The Effect of Vitamin D Therapy on Morbidity and Moratlity in Patients With SARS-CoV 2 InfectionCompletedNCT04733625Not applicable
• Effectiveness of Vitamin E and Hydrogen-Rich Water on Radiation Therapy-Induced Adverse In Patients With Rectal CancerStatus unknownNCT04713332Phase 3
• Efficacy and Safety of Tocovid Suprabio 200mg in Non-alcoholic Fatty Liver (NAFL)CompletedNCT04704063Phase 2
• Topical Tranexamic Acid Versus Topical Vitamin C With Microneedling in Periorbital Hyperpigmentation; Comparative StudyCompletedNCT04697992Not applicable
• Omega-3 Fatty Acids Plus Vitamin E Cosupplementation Versus Vitamin E in Fibrocystic Breast PatientStatus unknownNCT04694027Phase 4
• Effect of Weekly High-dose Vitamin D3 Supplementation on the Association Between Circulatory FGF-23 and A1c LevelsCompletedNCT04682626Not applicable
• Role of Mega Dose of Vitamin C in Critical COVID-19 PatientsCompletedNCT04682574Not applicable
• viTAmin K2 and rEcOVery From ExeRciseCompletedNCT04676958Not applicable
• Effect of Vitamin K Supplementation on Circulating Levels of Osteocalcin on the Bone Metabolism and AgingTerminatedNCT04669782Not applicable
• Effects of Bromelain and Boswellia Serrata Casperome With Centella Asiatica and Vitamins on Edema, Paresthesia and Postoperative Pain After Quadrantectomy With or Without Sentinel Lymph Node Biopsy.Status unknownNCT04669119Phase 4
• Vitamin D Supplementation in Children With Sickle Cell DiseaseStatus unknownNCT04662476Not applicable
• Intralesional Vitamin D in Alopecia AreataStatus unknownNCT04660786Phase 1/2
• Efficacy and Safety of Tocotrienols in CADASILCompletedNCT04658823Phase 2
• Vitamin D Supplementation in Individuals With a Chronic Spinal Cord InjuryCompletedNCT04652544Phase 3
• Vitamin D and Zinc Supplementation for Improving Treatment Outcomes Among COVID-19 Patients in IndiaCompletedNCT04641195Phase 3
• Effect of Vitamin D on Hospitalized Adults With COVID-19 InfectionCompletedNCT04636086Phase 4
• Gemcitabine Plus Ascorbate for Sarcoma in Adults (Pilot)Active, not recruitingNCT04634227Early Phase 1
• Efficacy of Vitamin D Treatment in Mortality Reduction Due to COVID-19.CompletedNCT04621058Phase 3
• Cod Liver Oil for Covid-19 Prevention StudyCompletedNCT04609423Phase 4
• Comparison of 1 Liter PEG With Ascorbate and Sodium Picosulfate / Magnesium Citrate for High Quality Colon CleansingCompletedNCT04598880Phase 4
• Vitamin D3 Supplementation to Prevent Respiratory Tract InfectionsCompletedNCT04596657Not applicable
• The Role of Vitamin D, A, and Beta Carotene in Tuberculosis Patients With Vitamin D Receptor Gene PolymorphismCompletedNCT04593524Not applicable
• Pregnancy Outcome and Vitamin D Level Among Vitamin D Supplementation During PregnancyCompletedNCT04591847Phase 3
• Trial of Vitamin D to Reduce Risk and Severity of COVID-19 and Other Acute Respiratory InfectionsCompletedNCT04579640Phase 3
• Benign Paroxysmal Positional Vertigo (BPPV) in Older PatientsStatus unknownNCT04578470Phase 2
• VITamin D and OmegA-3 TriaL: Interrelationship of Vitamin D and Vitamin K on Bone (VITAL)Active, not recruitingNCT04573946Not applicable
• High Dose Vitamin D Plus Multivitamin in the Prevention of Cluster HeadacheTerminatedNCT04570475Not applicable
• Vitamin A for BPD PreventionStatus unknownNCT04563429Not applicable
• Impact of Vitamin C on Biomarkers of Neurologic Injury in Survivors of Cardiac ArrestStatus unknownNCT04563000Phase 2
• RCT,Double Blind, Placebo to Evaluate the Effect of Zinc and Ascorbic Acid Supplementation in COVID-19 Positive Hospitalized Patients in BSMMUStatus unknownNCT04558424Not applicable
• Effect of Vitamin D on Morbidity and Mortality of the COVID-19Status unknownNCT04552951Phase 4
• Effect of Vitamin D Supplementation in Live Birth Rate of in Vitro Fertilization OutcomeStatus unknownNCT04547530Phase 4
• Vitamin K2 Supplementation and Vascular CalcificationCompletedNCT04539418Phase 4
• The Association of Vitamin D Supplementation With the Outcome in Critically Ill ChildrenCompletedNCT04536831Phase 4
• Vitamin D for COVID-19 TrialCompletedNCT04536298Phase 3
• Efficacy of Vitamin D Supplementation to Prevent the Risk of Acquiring COVID-19 in Healthcare WorkersCompletedNCT04535791Phase 3
• The Effect of Melatonin and Vitamin C on COVID-19CompletedNCT04530539Not applicable
• Effect of Vitamin d Deficiency in Chronic Rhinosinusitis With Nasal PolyposisStatus unknownNCT04529668Phase 1
• Perioperative Vitamin C Lung TransplantWithdrawnNCT04505878Phase 2
• Efficacy of Vitamin D Treatment in Pediatric Patients Hospitalized by COVID-19CompletedNCT04502667Phase 3
• Preoperative Use of Tocotrienol From Annatto Bixa Orellana L. in Breast Cancer Patients: a Prospective Clinical Trial.CompletedNCT04496492Phase 2
• Efficacy of Vitamin C on AKI Outcomes in Critically Ill Cirrhotics With Multidrug-resistant Bacterial Infections.CompletedNCT04494451Not applicable
• Potentiation of Chemotherapy in Brain Tumors by ZincStatus unknownNCT04488783Not applicable
• PRevention of COVID-19 With Oral Vitamin D Supplemental Therapy in Essential healthCare TeamsTerminatedNCT04483635Phase 3
• Comparative Study Evaluating the Effect of Vitamin K1 Versus Vitamin K2 on Vascular Calcification in Dialysis PatientsCompletedNCT04477811Phase 2/3
• 16 Weeks' Dietary Supplementation With Iron and Iron + Vitamin C on Cerebral Blood Flow and Energy Expenditure in Women of Reproductive AgeCompletedNCT04477018Not applicable
• The Effect of D3 on Selected Cytokines Involved in Cytokine Storm in the Covid-19 Uninfected Jordanian PeopleCompletedNCT04476745Not applicable

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