Trials / Conditions / Vitamin D Deficiency

Vitamin D Deficiency

650 registered clinical trials studyying Vitamin D Deficiency — 28 currently recruiting.

Status	Trial	Sponsor	Phase
Not Yet Recruiting	The Role of Urinary RhoA, NGF, and BDNF Levels in Overactive Bladder and Vitamin D Deficiency NCT07513363	Tarik Emre Sener	N/A
Recruiting	Evaluation of the Clinical and Psychological Impact of Vitamin D Replacement in Adolescent Females at Risk for NCT04355572	Yale University	N/A
Not Yet Recruiting	Bone Myoregulation Reflex and Postural Control in Vitamin D Deficiency NCT07435935	Istanbul Physical Medicine Rehabilitation Training and Research Hospital	—
Recruiting	Effects of Different Vitamin D3 Formulations in Vitamin D-Deficient Adults NCT07317830	Center for Health Sciences, Serbia	N/A
Recruiting	Is There a Benefit From Addition of Exercise in Diabetic Patients With ED Who Complain Low Vitamin D? NCT07366970	Cairo University	N/A
Recruiting	A Household-Based Dietary Intervention Study of Vitamin D Fortified Bread in Irish Families NCT07481240	University College Cork	N/A
Completed	Vitamin D Status in Young Medical Residents NCT07479303	Maimónides Biomedical Research Institute of Córdoba	—
Active Not Recruiting	Preoperative Correction of Vitamin D Deficiency in Total Joint Arthroplasty (TJA) NCT07006714	University of Miami	Phase 4
Active Not Recruiting	Effect of Vitamin D on the Clinical and Radiographic of Unsplinted Mandibular Implant Overdentures NCT07200011	Mansoura University	—
Not Yet Recruiting	Clinical Trial of Vit D and Calcium for Recurrent BPPV NCT05863949	Ottawa Hospital Research Institute	N/A
Recruiting	Clinical Comparative Evaluation of the Use of Photodynamic Therapy in Conjunction With the Use of Vitamin D in NCT06700122	Cairo University	N/A
Recruiting	Clinical Assessment of Adjunctive Omega-3 Versus Vitamin D Daily Supplements on Active Periodontal Therapy Wit NCT06654063	Cairo University	N/A
Recruiting	Vitamin A Supplementation in Allogeneic Stem Cell Transplantation. NCT06450925	Children's Hospital Medical Center, Cincinnati	Phase 2
Recruiting	Effect of Vitamin D Deficiency on the Frequency and Severity of Spinal Anesthesia-Induced Hypotension in Pregn NCT07057362	Duzce University	—
Completed	Vitamin D Status in Hemodialysis Transplant Candidates and Living Donors NCT07409623	Shahid Beheshti University of Medical Sciences	—
Enrolling By Invitation	Challenges in Achieving Adequate Dietary Status of Women NCT06745817	Institute of Nutrition, Slovenia (Nutris)	—
Completed	Vitamin D Versus Desmopressin Versus Combination Therapy in Children With Primary Monosymptomatic Nocturnal En NCT07292753	Ain Shams University	N/A
Completed	The Impact of Vitamin D Supplementation in Hypertensive Vitamin D Deficient Patients. NCT06645041	University of Sulaimani	N/A
Completed	OASIS Study: Vitamin D Deficiency Prevention Among Older Adults in Ireland NCT06705582	University College Cork	N/A
Active Not Recruiting	Vitamin D Status Fluctuations Over One Academic Year in Students NCT06677411	Poznan University of Life Sciences	—
Not Yet Recruiting	The High Initial Dose of Monitored Vitamin D Supplementation in Preterm Infants. NCT06199102	Princess Anna Mazowiecka Hospital, Warsaw, Poland	N/A
Active Not Recruiting	Comparison of Different Doses of Vitamin D Supplementation on Glycated Haemoglobin and Blood Glucose Parameter NCT07321223	University of Lahore	N/A
Active Not Recruiting	Emulated Study of Vitamin D Correction Vs Non-Correction NCT06366776	The Cooper Health System	—
Active Not Recruiting	Relationship Between Maternal Awareness About Vitamin D for Under- Five Years Children and Their Health Status NCT06562426	Alexandria University	—
Completed	High-Dose Vitamin D3 for Diabetic Foot Ulcer Healing: Randomized Controlled Trial NCT07139964	Universitas Sriwijaya	N/A
Not Yet Recruiting	REstoration of VItamin D in Pulmonary Arterial Hypertension NCT06258850	Parc de Salut Mar	Phase 4
Active Not Recruiting	Abnormally High Parathyroid Hormone Levels Worsens Outcomes in Vitamin D Depleted Critical Care Patients NCT06711874	National Taiwan University Hospital	—
Completed	Effect of Vitamin D Supplementation on Metabolic Parameters in Patients With Type 2 Diabetes and Vitamin D Def NCT07468721	Faculty of Medical Sciences, Clinical Hospital	N/A
Completed	Risk in Devel Long-COVID in Contracting SARS-CoV-2 Infection After COVID-19 Vaccination in Relation to Vitamin NCT06452082	IRCCS San Raffaele	—
Unknown	The Effectiveness of Vitamin D Supplementation in Patients With End-stage Knee Osteoarthritis NCT05981534	Chinese University of Hong Kong	N/A
Completed	Association of Vitamin D Status With Metabolic Markers in Adolescents With Polycystic Ovary Syndrome NCT06970821	Bagcilar Training and Research Hospital	—
Unknown	Relationship Between Vitamin D and Vitamin B12 Levels and Neuropathic Pain in Lipedema NCT06338059	Fatih Sultan Mehmet Training and Research Hospital	—
Recruiting	Early Vitamin D3 Supplementation for Critically Ill Patients NCT05937789	National Taiwan University Hospital	N/A
Unknown	Beneficial Effects of Vitamin D Combined With Oral Iron Supplementation in Patients With Chronic Heart Failure NCT05702970	University of Padova	Phase 4
Completed	Effect of Vitamin D on Body Composition and Functionality of Older Adults NCT07275177	Universidad Autónoma Benito Juárez de Oaxaca	N/A
Not Yet Recruiting	Vitamin D Levels in Neonatal Umbilical Cord Blood: Factors and Prognostic Analysis NCT06111066	Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University	—
Completed	Vitamin D in Armenia: Vitamin D Repletion Strategies With Dibase, and Vitamin D and Vitamin D Binding Protein NCT06406543	Columbia University	N/A
Unknown	Vitamin D Supplementation in Pediatrics. Oral or Parenteral! D2 or D3 NCT06176157	Ain Shams University	Phase 4
Active Not Recruiting	Vitamin D Sulfates in Breastmilk NCT06203041	Mayo Clinic	N/A
Unknown	Effects of Vitamin D on Health Promotion During Pregnancy and Its Impact on Prematurity-Related Outcome NCT06292195	University of Évora	—
Recruiting	Estimation of the Dietary Requirement for Vitamin D in Ethnic Groups NCT06067477	University of Surrey	N/A
Completed	Vit D and Post-extractive Bone Turnover NCT06412705	Studio Odontoiatrico Associato Dr. P. Cicchese e L. Canullo	N/A
Completed	Vitamin D Deficiency As a Risk Factor for the Development and Malignant Transformation of Oral Lichen Planus NCT06033105	Fayoum University	—
Completed	The Role of Vitamin D in Amelioration of Oral Lichen Planus and Its Effect on Salivary IFN-γ Level NCT06204796	Fayoum University	Phase 4
Unknown	Vit D and Peripheral Neuropathy in Taxane Naive Patients NCT05852496	Assiut University	Phase 2
Recruiting	Oral Vitamin D Supplementation Prevent Peritoneal Dialysis-related Peritonitis NCT05860270	Peking University First Hospital	Phase 4
Unknown	Evaluation Of The Effect Of L. Casei DG® On Vitamin D Absorption In Patients Under Vitamin D Supplementation. NCT05394207	SOFAR S.p.A.	N/A
Completed	High Dose Vitamin D Supplementation in Children With Sickle Cell Disease NCT06274203	Zagazig University	N/A
Completed	Peripheral Immunological Effects of High-dose Vitamin D Treatment in Healthy Subjects NCT05654818	Centre Hospitalier Universitaire de Nīmes	N/A
Unknown	Effects of Vitamin D on the Behaviours, Mental, and Physical Health of Prisoners NCT05724316	Oxford Brookes University	N/A
Completed	The Effect of UV-C Enriched Foods on Vitamin D Deficiency NCT06098820	Okan University	N/A
Enrolling By Invitation	Resistive Exercise Versus HIIT on Calcium and Vitamin D NCT05795504	Cairo University	N/A
Recruiting	Randomized Trial of Enteral Vitamin D Supplementation in Infants < 28 Weeks Gestational Age or <1000 Grams Bir NCT05694689	The University of Texas Health Science Center, Houston	N/A
Active Not Recruiting	Oral or Intra Muscular Vitamin D2 Vs Oral or Intra Muscular Vitamin D3 in Treatment of Vitamin D Deficiency NCT06618365	Hamad Medical Corporation	N/A
Recruiting	Vitamin D and Polycystic Ovarian Syndrome (PCOS) NCT03989778	Aga Khan University	Phase 2
Terminated	Phase 3 Safety and Efficacy Study of CTAP101 Extended-release Capsules in Children With Secondary Hyperparathy NCT05543928	OPKO Health, Inc.	Phase 3
Completed	Effects of Vitamin D on Cardiovascular Health in Black Women NCT05656742	University of Delaware	N/A
Completed	A Comparative Dissolution and Absorption Study of an Orodispersible Powder, Chewable Tablet and Soft Gel Capsu NCT05706259	Liaquat University of Medical & Health Sciences	N/A
Completed	Physical Exercise and Diet Management in Vitamin D Deficient Females NCT06114381	Badr University	N/A
Unknown	Peri-operative Vitamin D Therapy for Hepatectomy NCT05650151	National Taiwan University Hospital	N/A
Unknown	A Study on Prevention Strategies for CKD-SHPT and Related Complications Based on General Vitamin D Supplementa NCT05549154	First Affiliated Hospital Xi'an Jiaotong University	N/A
Completed	Effects of Vitamin D-Enriched Mushrooms on Vitamin D Status and Immune Function and Inflammatory Status in Adu NCT05559112	Purdue University	N/A
Active Not Recruiting	Vitamin D Deficiency With Selected Vitamin D Receptor Gene Polymorphism in Gestational Hypertension NCT05659173	Universiti Putra Malaysia	—
Unknown	The Cohort Study of the Correlation Between Serum 25(OH)D Level and Pregnancy Outcome NCT05824897	Aimin Zhao	—
Unknown	Relationship Between Serum Vitamin D and Outcomes of Liver Transplantation in Cirrhotic Patients Undergoing Li NCT05568836	National Nutrition and Food Technology Institute	Phase 1 / Phase 2
Not Yet Recruiting	Menier's Disease - Bone Density Study NCT05322538	HaEmek Medical Center, Israel	N/A
Active Not Recruiting	Effects of Vitamin D Supplementation in Adolescents With Asthma, Obesity and Vitamin D Deficiency. NCT05431920	Hospital Infantil de Mexico Federico Gomez	N/A
Completed	Vitamin D Deficiency in Adults Following a Major Burn Injury NCT05084248	University of Texas Southwestern Medical Center	Phase 4
Unknown	Effect of Supplementation With ω-3 Fatty Acids, Vitamin D and Calcium in Patients With Acute Lymphoblastic Leu NCT05950204	Coordinación de Investigación en Salud, Mexico	N/A
Active Not Recruiting	ViDES Trial (Vitamin D Extra Supplementation) NCT05459298	The University of Texas Health Science Center, Houston	N/A
Unknown	Comparative Pharmacokinetics of Two Different Oral Delivery Systems of Cholecalciferol NCT05104970	Scotmann Pharmaceuticals	Phase 2
Completed	A Study of Fixed Dose Versus Serum Level-Based Titration Regimen of Vitamin D Supplementation in Dialysis Pati NCT05434377	Chulalongkorn University	N/A
Completed	Efficacy of Intensive Cholecalciferol Monitoring and Supplementation on Serum vitD Levels in Pediatric Patient NCT05276960	Hospital Infantil de Mexico Federico Gomez	Phase 4
Unknown	Calcitriol Supplementation in COVID-19 Patients NCT05415254	RenJi Hospital	N/A
Unknown	The Effect of Vitamin D3 Therapy in Post Menopausal Women and Assessment of Changes in Bone Mineral Density Af NCT05389943	University of Sargodha	Phase 1
Completed	The Effect Vitamin D on the Recovery Rate of Bell Palsy NCT05997199	Umraniye Education and Research Hospital	—
Unknown	Dietary Challenges in the Population of Nursing Homes' Residents NCT05389618	Institute of Nutrition, Slovenia (Nutris)	—
Completed	Impact of COVID-19 Vaccination on Serum 25-hydroxyvitamin D Level NCT05398939	National Taiwan University Hospital	—
Unknown	The Genetic Effects on Vitamin D Supplementation NCT05802433	St. Mary's University, Twickenham	N/A
Completed	Cholecalciferol Supplementation in Hemodialysis Patients NCT05922696	Ain Shams University	Phase 2 / Phase 3
Completed	Vitamin D, Oxidative Stress and Inflammation in Hemodialysis NCT05460338	Ain Shams University	Phase 2 / Phase 3
Unknown	Vitamin D Levels in Umbilical Cord and It's Impact on Infant and Children's Health (VITADi Study) NCT05419973	Hasanuddin University	—
Completed	PREDIN: Pregnancy and Vitamin D Intervention Study NCT05329428	Göteborg University	N/A
Withdrawn	Cholecalciferol Supplementation in Restless Leg Syndrome in Patients With Chronic Kidney Disease NCT03063190	University of Sao Paulo General Hospital	Phase 4
Unknown	Study to Document the Phenomenon of Vitamin D Deficiency and Its Added Value in Patients with Low-energy Osteo NCT06643650	National and Kapodistrian University of Athens	—
Completed	25-Hydroxyvitamin D Levels in Patients With Periodontitis (Stage III) NCT05343273	Ataturk University	—
Completed	Evaluating the Effect of SOLIUS UV Light Source in Improving Vitamin D Status NCT04780776	Boston University	N/A
Completed	GraviD-child Follow-up of the Children´s Health, Growth and Development Within the GraviD-study NCT05228925	Göteborg University	—
Unknown	FREQUENCY OF VITAMIN D DEFICIENCY IN PREMATURE NEWBORN BORN BEFORE 32 WEEKS AND/OR WITH A BIRTH WEIGHT UNDER 1 NCT06315452	Fondation Hôpital Saint-Joseph	—
Completed	Magnesium and Vitamin D Combination for Post-COVID Syndrome NCT05630339	Coordinación de Investigación en Salud, Mexico	N/A
Recruiting	Investigating the Relationship Between Temporal Bone CT, Bone Density, and Hearing Loss in Otosclerosis Patien NCT06830187	İbrahim Emir Yeşil	—
Completed	Vitamin-D Insufficiency and Implants NCT06452251	Vesile Elif Toy	—
Completed	Comparıson Of Electromyography Results Before And After Vıtamın D Treatment In Patıents Wıth Carpal Tunnel Syn NCT06282640	Dr. Ayşe Güç	Phase 4
Unknown	Correlation Between Serum Vitamin D3 and Incidence of Uterine Leiomyoma NCT05151393	Ain Shams University	—
Unknown	Vitamin D Supplementation and Clinical Outcomes in Severe COVID-19 Patients NCT05384574	University Hospital of Split	N/A
Unknown	Vitamin D Supplementation and Improvement of PCOS Therapy and IVF Outcomes in Infertile Saudi Women NCT05106712	Umm Al-Qura University	N/A
Completed	Prevalence of Vitamin D Deficiency in Pregnant Women and Their Fetus in North Jordan NCT04944212	Jordan University of Science and Technology	—
Recruiting	Impact of Vitamin D Supplementation on the Rate of Pathologic Complete Response in Vitamin D Deficient Patient NCT04677816	Wake Forest University Health Sciences	Phase 2
Completed	Supplementation and Depressive Symptomatology Incidence Among Saudi Arabian Adults NCT05916053	Lebanese American University	N/A
Withdrawn	Effects of Stoss Therapy of Vitamin D3 on Peri-operative Outcomes in Patients Receiving General Surgery NCT05650268	National Taiwan University Hospital	N/A
Unknown	Vitamin D3 Supplementation for Vitamin D Deficiency in Rotator Cuff Repair Surgery NCT05009498	Community Memorial Health System	N/A
Completed	Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D NCT04865432	Boston University	N/A
Unknown	Effect of Vitamin D Oral Supplementation in Poly Csytic Ovarian Women Resistant to Clomiphene Citrate NCT04916925	rana alaaeldin aly ibrahim nasr	Phase 1 / Phase 2
Completed	COVID-19 and Vitamin D: Length of Hospital Stay and Mortality NCT05221983	Yuksek Ihtisas University	—
Unknown	Vitamin D Level and Pain Type in Coccygodynia NCT05047393	Cumhuriyet University	—
Completed	Nutrition, Immunity, and Covid-19 in Obese People NCT04979065	Indonesia University	Phase 2
Completed	Vitamin D Supplementation in Estonian Conscripts NCT04939636	Tartu University Hospital	N/A
Completed	Effect of Vitamin D Supplement on Disease Activity in SLE NCT05260255	Department of Medical Services Ministry of Public Health of Thailand	N/A
Completed	Vitamin D Replacement Using Oral Thin Film (OTF) Cholecalciferol in Patients Undergoing Hematopoietic Stem Cel NCT04818957	Children's Hospital Medical Center, Cincinnati	N/A
Completed	Prevention of Postoperative Hypocalcemia of Oral Vitamin D Supplementation Before Total Thyroidectomy NCT05216419	Seoul National University Hospital	Phase 4
Completed	Vitamin D Levels in Non-immediate Drug Hypersensitivity Case-control Study NCT06263140	Chulalongkorn University	—
Completed	Vitamin D Supplementation in Individuals With a Chronic Spinal Cord Injury NCT04652544	Swiss Paraplegic Research, Nottwil	Phase 3
Terminated	Mothers' Own Milk Optimization for Preterm Infants Project (MoMO PIP) Pilot Study NCT04629534	Medical University of South Carolina	Phase 4
Completed	Effect of Single High Dose of Cholecalciferol on Serum Metabolites of Vitamin D NCT05591170	Department of Endocrinology, Centre of Postgraduate Medical Education	Phase 4
Unknown	The Effect of Vitamin D3 Therapy on Vitamin D Status in Pregnant Women With Vitamin D Deficient and Insufficie NCT06054919	Indonesia University	Phase 2 / Phase 3
Completed	Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3 NCT04885803	Inspired Life Medical, Inc.	N/A
Completed	Effects of High Intensity Statin Therapy on Steroid Hormones and Vitamin D in Type 2 Diabetic Men NCT05806723	Hopital La Rabta	Phase 4
Completed	Vitamin D Deficiency as Independent Predictor for Plaque Vulnerability NCT06473337	Medical University of Vienna	—
Completed	Retinal Changes in Vitamin D Deficiency NCT04891211	Adiyaman University	N/A
Completed	Vitamin D Status in Children With Sickle Cell Disease Living in Lyon, France NCT04694976	Hospices Civils de Lyon	—
Completed	The Effects of a Sublingual Sprayable Microemulsion of Vitamin D on Inflammatory Markers in COVID-19 Patients NCT05502068	Pauls Stradins Clinical University Hospital	N/A
Completed	Effect of Exercise Intensity on Vitamin D NCT05024110	Taif University	N/A
Completed	Effect of Vitamin D Deficiency on the Structure of Titanium Platelet-Rich Fibrin NCT06870786	Abant Izzet Baysal University	N/A
Unknown	Vitamin D and Serum Calcium Level Insufficiency and Early Dental Implant Failure NCT04906161	Ain Shams University	—
Completed	Comorbidity-Based Propranolol Use in Pediatric Migraine NCT07103031	Kayseri University	—
Completed	Study on Clinical Value of Vitamin D in Recurrent Spontaneous Abortion NCT06002035	Jianmei Xia	—
Completed	Vitamin D Deficiency and Body Composition in the Patients With Hemophilia NCT05517070	Tsung-Ying Li	—
Completed	Effects of Vitamin D Supplementation on Depression and Inflammatory Markers NCT04898725	Mackay Memorial Hospital	N/A
Completed	Efficacy and Safety of Calcifediol vs Placebo in Subjects With Vitamin D Deficiency NCT04735926	Faes Farma, S.A.	Phase 2 / Phase 3
Completed	High Dose Vitamin-D Substitution in Patients With COVID-19: a Randomized Controlled, Multi Center Study NCT04525820	Prof. Dr. Jörg Leuppi	N/A
Completed	Clinical Outcomes of High Dose Vitamin D Versus Standard Dose in COVID-19 Egyptian Patients NCT04738760	Ain Shams University	—
Unknown	Vitamin D Status and Bone Metabolism Status in Children With Congenital Epidermolysis Bullosa NCT05141838	National Medical Research Center for Children's Health, Russian Federation	Phase 4
Unknown	Effect of Treatment for Vitamin D Deficiency on Thyroid Function and Autoimmunity in Hashimoto's Thyroiditis. NCT04778865	Universidad de Valparaiso	N/A
Completed	Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans NCT04939792	Louisiana State University Health Sciences Center Shreveport	EARLY_Phase 1
Recruiting	High Dose Interval Vitamin D Supplementation in Patients With Inflammatory Bowel Disease Receiving Biologic Th NCT04331639	Boston Children's Hospital	—
Completed	Baseline Vitamin D Deficiency and COVID-19 Disease Severity NCT04628000	Parkview Medical Center	—
Completed	Effect of Exercise on Vitamin d in Obese NCT05066490	Taif University	N/A
Unknown	Exploring the Effects of Vitamin D Supplementation on the Chronic Course of Patients With Crohn's Disease With NCT04308850	Second Affiliated Hospital of Wenzhou Medical University	EARLY_Phase 1
Unknown	Exploring the Effects of Caltrate Supplement on the Chronic Course of Crohn's Disease Patients With Vitamin D NCT04276636	Second Affiliated Hospital of Wenzhou Medical University	EARLY_Phase 1
Completed	Daily Vitamin D for Sickle-cell Respiratory Complications NCT04170348	Columbia University	Phase 2
Unknown	Influence of Military Preventive Policy for reCruit Training on COVID-19 Seroconversion NCT04476680	Royal Centre for Defence Medicine	N/A
Suspended	Replenishing and Maintaining Vitamin D Status in Older Adults in Residential Care Facilities in NI NCT04395638	University of Ulster	N/A
Completed	Vitamin D Status Among Infertile Women in Sweden NCT05848349	Vastra Gotaland Region	—
Completed	Efficacy of Oral Vitamin D Supplementation in Adolescents and Young Adults. NCT04377386	Fundación Cardiovascular de Colombia	N/A
Active Not Recruiting	Vitamin D Supplementation in the Prevention and Mitigation of COVID-19 Infection NCT04482673	Medical University of South Carolina	Phase 4
Completed	Does Supplementing Vitamin D Deficiency Affect Fusion Healing Rates in Elective Foot and Ankle Surgery? NCT04450199	Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute)	EARLY_Phase 1
Completed	The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 Infection NCT04945577	Fatih Sultan Mehmet Training and Research Hospital	—
Unknown	The Effect of Preoperative Oral Dexamethasone Supplementation on the Outcome of Thyroidectomised Patients. NCT04412694	Medical University of Lodz	Phase 4
Unknown	Vitamin D in Pregnancy NCT04291313	University of Aarhus	N/A
Completed	Investigating the Role of Vitamin D in the Morbidity of COVID-19 Patients NCT04386044	Tameside General Hospital	—
Completed	Vitamin D Testing and Treatment for COVID 19 NCT04407286	Arizona State University	Phase 1
Completed	Vitamin D Levels and Postoperative Pain in Laparoscopic Cholecystectomy NCT04687527	Bozok University	—
Withdrawn	The LEAD COVID-19 Trial: Low-risk, Early Aspirin and Vitamin D to Reduce COVID-19 Hospitalizations NCT04363840	Louisiana State University Health Sciences Center in New Orleans	Phase 2
Completed	Vitamin D Levels in SARS-CoV-2: Do Current Adequacy Thresholds Reflect Clinical Risk? Insights From a Large Tu NCT04394390	Bursa City Hospital	—
Completed	Evaluation of the Relationship Between Zinc Vitamin D and b12 Levels in the Covid-19 Positive Pregnant Women NCT04407572	Kanuni Sultan Suleyman Training and Research Hospital	—
Completed	Effects of Enteral Supplement Vitamin D Incritically Ill Patients NCT04292873	National Taiwan University Hospital	N/A
Completed	The Effects of Vitamin D3 Alone and in a Combination With Omega-3 on the Association of C-peptide With Glycemi NCT04307784	Applied Science Private University	N/A
Unknown	Observation of the Effect of Vitamin D Supplementation on Chronic Course of Patients With Ulcerative Colitis B NCT04309058	Second Affiliated Hospital of Wenzhou Medical University	EARLY_Phase 1
Completed	ETOL-Elderly Study of the Efficiency of the Innovative Food Supplement in Elderly Adults NCT05661006	Institute of Nutrition, Slovenia (Nutris)	N/A
Recruiting	Vitamin D and Health Status of British African-Caribbean Women NCT04179370	University of Surrey	—
Completed	Vitamin D Enriched Meat Project (Acute Study) NCT04207294	University of Ulster	N/A
Unknown	Development of a Screening Tool for the Risk of Vitamin D Deficiency NCT04404842	University of Pavia	—
Completed	Effect of Aerobic Interval Training With Vitamin D Supplement on Functional Capacity and Perceived Myalgia NCT04319289	Cairo University	N/A
Completed	Effect of Vitamin D Supplementation on Vedolizumab Response in Patients With Ulcerative Colitis NCT05649462	Second Affiliated Hospital of Wenzhou Medical University	—
Completed	Vitamin D Deficit in Women With Uterine Fibroids NCT04030182	Instituto Mexicano del Seguro Social	—
Unknown	the Effect of Vitamin D in Crohn's Disease NCT04134065	Nanjing University School of Medicine	EARLY_Phase 1
Completed	Bone Health and Vitamin D Status NCT01634607	Thai Red Cross AIDS Research Centre	—
Completed	Innovative Food Structures to Enhance Nutrient Bioavailability NCT04156074	University College Dublin	N/A
Completed	12 Weeks Vitamin D Supplementation and Physical Activity in PD Patients With DBS NCT04768023	Medical University of Gdansk	N/A
Unknown	Vitamin D in School Children NCT05018988	University of Ulster	N/A
Completed	Effect of Vitamin d and Omega 3 on Osteocalcin NCT04005612	Applied Science Private University	N/A
Completed	A Study to Investigate the Effect of Vitamin D3 Supplementation on Asthma Symptoms in Adults With Asthma (VITD NCT04117581	University of Chester	N/A
Completed	Vitamin D 24'000 IU for Oral Intermittent Supplementation NCT03920150	University Hospital, Basel, Switzerland	Phase 3
Unknown	Can Vitamin D Supplementation in People With Crohn's Disease Improve Symptoms as an Adjunct Therapy? NCT03718182	University Hospital Birmingham NHS Foundation Trust	Phase 4
Unknown	Effect of Vitamin D Supplementation on Improvement of Pneumonic Children NCT04244474	Cairo University	Phase 1 / Phase 2
Unknown	Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications NCT04229368	Brigham and Women's Hospital	N/A
Completed	The Combined Effect of Omega-3 Fatty Acid and Vitamin D3 on Lipid Profile Levels and Oxidized Low Density Lipo NCT04005573	Applied Science Private University	N/A
Completed	Vitamin D and Microvascular Function in Postmenopausal Women NCT05408273	Rio de Janeiro State University	—
Unknown	A Trial to Evaluate the Effect of Vitamin D Supplementation in Patients With Chronic Urticaria NCT03991845	Post Graduate Institute of Medical Education and Research, Chandigarh	Phase 4
Terminated	PK/PD of Vitamin D3 in Adults With CF NCT03734744	University of Southern California	N/A
Completed	Rapid Normalization of Vitamin D Deficiency in PICU NCT03742505	Children's Hospital of Eastern Ontario	Phase 3
Completed	Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among Veterans NCT04621500	Medical University of South Carolina	Phase 2
Completed	Vitamin D Can Increase Pathological Response of the Breast Cancer Patients Treated With Neoadjuvant Therapy NCT03986268	Florence Nightingale Hospital, Istanbul	N/A
Unknown	Vitamin D and Human Sperm DNA Fragmentation NCT03829943	Sanford Health	—
Active Not Recruiting	High-dose Vitamin D Supplements in Older Adults NCT03613116	University of California, Davis	Phase 2
Unknown	Vitamin D Level and Its Relation to Pre-eclampsia and Eclampsia NCT03882099	Cairo University	—
Completed	Relationship Between Serum Vitamin D Levels and Musculoskeletal Adverse Effects in Patients Using Isotretinoin NCT04204304	Ankara Training and Research Hospital	N/A
Unknown	Vitamin D Deficiency and Effect of Its Supplementation on Interstitial Lung Diseases(ILD). NCT04100226	Cairo University	N/A
Completed	Vitamin D Effect on A Disintegrin-like And Metalloprotease Thrombospondin1 Motif 13& Interleukin 6 in Leukemia NCT05149339	Zagazig University	Phase 1 / Phase 2
Completed	Open Label Randomized Clinical Study to Promote a Healthy Lifestyle in Medical Students NCT05073029	Bogomolets National Medical University	N/A
Completed	Vitamin D Oral Replacement in Asthma NCT03686150	IDeA States Pediatric Clinical Trials Network	N/A
Unknown	Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Bir NCT03876704	First Affiliated Hospital Xi'an Jiaotong University	Phase 3
Completed	Helminth Infection During Pregnancy on Vitamin D Regulation: HELMVIT Study NCT04324853	Centre de Recherche Médicale de Lambaréné	—
Terminated	Treatment of Vitamin D Deficiency With Large Bolus Cholecalciferol NCT04120064	Parkview Medical Center	Phase 1
Completed	The Influence of Food Matrix Delivery System on the Bioavailability of Vitamin D3 NCT03783273	University of Aarhus	N/A
Completed	Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2 NCT03810261	Institute of Nutrition, Slovenia (Nutris)	N/A
Unknown	Serum and Semen Vitamin D Level With Semen Parameters NCT03477136	Assiut University	—
Completed	Effect of Vitamin D3 and Omega-3FA on Leptin and HbA1C With Vitamin D Deficiency NCT03735303	Applied Science Private University	N/A
Completed	Vitamin D Levels And Myoma Uteri NCT03871868	Kanuni Sultan Suleyman Training and Research Hospital	—
Completed	Effect Of Laparoscopic Sleeve Gastrectomy on Vitamin D, Parathormone and Calcium Levels NCT05430932	Kafrelsheikh University	N/A
Completed	25-Hydroxyvitamin D Pharmacokinetic Study NCT03401541	Boston University	EARLY_Phase 1
Unknown	Association Between Vitamin D and the Risk of Uterine Fibroids NCT03586947	Second Affiliated Hospital of Wenzhou Medical University	N/A
Unknown	Association Between Vitamin D and the Development of Uterine Fibroids NCT03584529	Second Affiliated Hospital of Wenzhou Medical University	N/A
Suspended	Endocrine and Menstrual Disturbances in Women With Polycystic Ovary Syndrome (PCOS) NCT03652987	St George's, University of London	—
Completed	The Efficacy and the Safety of Vitamin D3 30,000 IU for Loading Dose Schedules NCT04476511	Semmelweis University	Phase 3
Unknown	Correlation Between Maternal Vitamin D Level And Preterm Birth NCT03638037	Ain Shams Maternity Hospital	—
Unknown	Prognostic Value of Vitamin D Levels in Egyptian Females With Breast Cancer NCT03594214	Assiut University	—
Terminated	Maintenance Dosing of Vitamin D in Crohn's Disease NCT03615378	Cedars-Sinai Medical Center	EARLY_Phase 1
Completed	Prevalence of Deficiency of Vitamin D in Critically Ill Patients NCT03639584	National Taiwan University Hospital	—
Completed	Vitamin D and Arterial Stiffness in Elderly NCT03649802	Texas Tech University Health Sciences Center	Phase 2
Completed	The Effect of Vitamin D and Exercise on Balance in Postmenopausal Women NCT03608488	Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey	N/A
Terminated	Improving Functionality in Older People NCT03611049	Texas Tech University Health Sciences Center	Phase 2
Completed	Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted Patients NCT03403647	Sheba Medical Center	N/A
Completed	Vitamin D3-enhanced Eggs in Preschool Children NCT06096194	Instituto Nacional de Salud Publica, Mexico	N/A
Terminated	Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI NCT03602261	OPKO Health, Inc.	Phase 2
Completed	Cholecalciferol on Hemodialysis Patients NCT03602430	Ain Shams University	Phase 2 / Phase 3
Completed	Absorption Kinetics and Efficacy of Vitamin D Enriched Supplements in Older Adults. NCT04935034	University College Dublin	N/A
Completed	SUN LIGHT EXPOSURE AND VITAMIN D LEVEL IN NURSING HOME NCT04469257	Tokat Gaziosmanpasa University	N/A
Unknown	Vitamin D3 Supplementation for AlloHSCT-RCT NCT03534674	University of British Columbia	N/A
Completed	Vitamin D for Muscle Metabolic Function in Cancer Cachexia NCT03144128	David Travis Thomas	N/A
Completed	Effect of Vitamin D Supplementation on Inflammatory Markers NCT03782805	Université d'Auvergne	N/A
Unknown	Vitamin D Deficiency Treatment Outcomes After Non-ST-Segment Elevation Myocardial Infarction NCT03405207	Isfahan University of Medical Sciences	Phase 2
Recruiting	Vitamin D for Critically Traumatic Patients NCT05449522	National Taiwan University Hospital	N/A
Completed	Synergistic Effect of Vitamin D Supplementation in Patients With Vitiligo and Vitamin D Deficiency NCT05364567	Hallym University Kangnam Sacred Heart Hospital	N/A
Terminated	Effect of High-Dose Vitamin D3 in Smokers and Non-Smokers With and Without HIV NCT03270709	Emory University	Phase 1
Completed	Incidence of HANA Conditions in HIV-infected Individuals NCT03483584	Chinese University of Hong Kong	—
Completed	Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time NCT03584256	University of Ljubljana	—
Completed	Immunomodulatory Vitamin D in Thalassemia NCT03919812	Universitas Padjadjaran	N/A
Completed	Vitamin D for Polycystic Ovary Syndrome Clomiphene Resistant Women NCT04010942	Ain Shams University	Phase 4
Unknown	Vitamin D Status in Inflammatory Bowel Disease NCT03496246	Assiut University	N/A
Terminated	High-dose Vitamin D3 in Pancreas Cancer NCT03472833	Medical University of Graz	Phase 3
Completed	Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study NCT03070483	Loyola University	Phase 2
Unknown	Effects of Vitamin D3 Supplementation on Antioxidant Enzymes Status in Vitamin D3 Deficient Asthma COPD Overla NCT03931889	Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh	N/A
Completed	Myocardial Function and Vitamin D Supplementation in Diabetes. NCT03437421	University of Avignon	N/A
Completed	The D-BIICEP Study NCT03253055	University of Surrey	—
Unknown	Supplementation With Vitamin D to Patients With Heart Failure (D-Heart). NCT03289637	Linkoeping University	N/A
Completed	Central Sensitization in Vitamin D Deficiency NCT03420378	Marmara University	N/A
Completed	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	Phase 4
Completed	Vitamin D Supplementation in Children NCT03402698	Children's Memorial Health Institute, Poland	N/A
Completed	Vitamin D Supplementation for the Prevention of Acute Respiratory Infections: a RCT in Young Finnish Men NCT05014048	Tampere University	N/A
Completed	Nutritional Deficiencies Preventive Treatment Prior to Laparoscopic Sleeve Gastrectomy NCT02483026	Hadassah Medical Organization	N/A
Completed	Vitamin D Supplementation to Prevent Vitamin D Deficiency for Children With Epilepsy NCT03536845	King Saud University	Phase 3
Completed	The Effect of Supplementation of Vitamin D Deficiency in Older People With Acute Hip Fracture: NCT03213886	Leonor Cuadra Llopart	Phase 4
Completed	Impact of Vitamin D Supplementation in Patients With Multiple Sclerosis NCT03385356	University Medical Centre Maribor	Phase 4
Terminated	Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial NCT03380091	University of California, San Francisco	Phase 4
Completed	The Effect of Vitamin D Supplementation on Psoriasis Severity NCT03334136	University Hospital of North Norway	N/A
Unknown	Vitamin D Supplementation and Tibia Fracture. Does it Improve Healing Rate? NCT03232216	Hospital del Trabajador de Santiago	N/A
Completed	'Palliative-D' Vitamin D to Palliative Cancer Patients NCT03038516	Region Stockholm	Phase 2
Completed	A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT NCT03176849	Phoenix Children's Hospital	Phase 4
Recruiting	The VITDALIZE Study: Effect of High-dose Vitamin D3 on 28-day Mortality in Adult Critically Ill Patients NCT03188796	Medical University of Graz	Phase 3
Completed	Oral Vitamin D Substitution Weekly or Monthly and Adherence NCT03141593	University Hospital, Basel, Switzerland	Phase 4
Completed	Vitamin D Supplementation and Glycemic Control Improvement Among Type 1 Diabetic Children NCT05141968	Al-Azhar University	N/A
Completed	The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis NCT03264625	Peking University First Hospital	Phase 2
Unknown	Relationship Between Body Composition, Food Consumption, and Micro and Macronutrients With Gene Expression in NCT04389424	Instituto Jalisciense de Cancerologia	—
Completed	Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery? NCT04323852	Shahid Beheshti University of Medical Sciences	Phase 4
Terminated	Vitamin D Supplementation in IBS NCT03148288	Beth Israel Deaconess Medical Center	N/A
Terminated	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	N/A
Active Not Recruiting	Vitamin D and Immune Mechanisms of Hypertension in Type 2 Diabetics NCT03348280	Washington University School of Medicine	—
Terminated	Cholecalciferol Supplementation in Critically Ill Patients With Severe Vitamin D Deficiency. NCT02868827	King Abdullah Medical City	Phase 2 / Phase 3
Completed	Vitamin D and Sleep Disorders in Pregnancy NCT04918368	Gaziosmanpasa Research and Education Hospital	—
Unknown	Vitamin D Level and Risk of Infections in Cirrhotic Patients NCT03391245	Assiut University	—
Completed	Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease( NCT03773809	Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh	N/A
Completed	Follicular Fluid, Bioavailable Vitamin D and Embryo Quality Markers NCT03073720	ART Fertility Clinics LLC	—
Unknown	Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency. NCT03158155	Nancy Ahmed El Salmawy	—
Suspended	Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients NCT03066817	New York City Health and Hospitals Corporation	Phase 1 / Phase 2
Completed	Adults Nutrition as a Protective or Health-risk Factor NCT03284840	Institute of Nutrition, Slovenia (Nutris)	—
Completed	Immunomodulating Effects of Supplementation With 25-OH Vitamin D NCT04822038	Coordinación de Investigación en Salud, Mexico	N/A
Unknown	Evaluation of Metabolic Predictors of Influenza Vaccine Immune Response in the Singapore Elderly Population - NCT03399357	Tan Tock Seng Hospital	—
Unknown	Effects of Vitamin D Supplementation During a Non-surgical Treatment of Generalized Chronic Periodontitis NCT03162406	Cliniques universitaires Saint-Luc- Université Catholique de Louvain	N/A
Completed	The Effect of Vitamin D on Fertility NCT03890458	Akdeniz University	Phase 4
Completed	Monitored vs Standard Supplementation of Vitamin D in Preterm Infants NCT03087149	Princess Anna Mazowiecka Hospital, Warsaw, Poland	N/A
Completed	Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes NCT03151174	Virginia Polytechnic Institute and State University	EARLY_Phase 1
Completed	Vitamin D to Improve Outcomes by Leveraging Early Treatment NCT03096314	Massachusetts General Hospital	Phase 3
Completed	Omega 3 and Vitamin D Dosage in a Population With Moderate to High Risk of AMD NCT04482465	Universitaire Ziekenhuizen KU Leuven	N/A
Unknown	Preeclampsia Research on Vitamin D, Inflammation, & Depression NCT03018132	Cedars-Sinai Medical Center	N/A
Unknown	The Impact of Vitamin D Deficiency on Hypocalcaemia Following Total Thyroidectomy NCT03063060	Hillel Yaffe Medical Center	—
Withdrawn	Vitamin D Repletion and Maintenance in IBD: How Much and How Often NCT03053414	Cedars-Sinai Medical Center	N/A
Completed	Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena? NCT03035084	King Faisal Specialist Hospital & Research Center	Phase 4
Completed	Vitamin D Supplementation on Metabolic Syndrome Indicators Among Older Adults, Alborz Province, Iran NCT03193944	Alborz Medical University	Phase 2
Completed	The Efficacy of Different Vitamin D Supplementation Delivery Methods NCT03463642	University of Wolverhampton	N/A
Unknown	Vitamin D Effect on Subarachnoid Hemorrhage NCT03482843	University Clinic Frankfurt	—
Withdrawn	Vitamin D Supplementation and Neurocognition NCT03019120	Rambam Health Care Campus	Phase 2
Completed	Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens NCT02662491	United Arab Emirates University	N/A
Completed	Uroflowmetry Results and Vitamin D Levels NCT04405141	Umraniye Education and Research Hospital	—
Completed	Reference Interval of Vitamin D of Coastal Fishermen in Cox's Bazar District of Bangladesh NCT04986319	Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders	—
Terminated	Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outco NCT02212652	Johns Hopkins University	N/A
Completed	30000 IU Per Week Vitamin D Treatment in PCOS Patients NCT04840238	Semmelweis University	Phase 2
Unknown	Effects of Supplementation of Vitamin D in Patients With Crohn's Disease NCT02704624	Federal University of Juiz de Fora	Phase 4
Completed	The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults NCT02876315	Oregon State University	N/A
Completed	Efficacy of Vitamin D Supplementation in Obese Children NCT02956408	Columbia University	N/A
Completed	Effect of Vitamin D3 and Omega-3FA on Estradiol NCT03333564	Applied Science Private University	N/A
Completed	Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic Fibrosis NCT02613884	Johns Hopkins All Children's Hospital	Phase 2
Completed	Vitamin D in Diabetic Children NCT03258086	Assiut University	N/A
Completed	Hypovitaminosis D in Neurocritical Patients NCT02881957	University of Utah	Phase 2 / Phase 3
Completed	Vitamin D Levels in Adolescent Idiopathic Scoliosis NCT03820895	Security Forces Hospital	—
Completed	Vitamin D Supplementation in Conscripts NCT04359524	Leho Rips	N/A
Completed	Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants NCT02930434	Pontificia Universidad Catolica de Chile	N/A
Completed	Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Stu NCT03318029	University of Surrey	N/A
Completed	Effect of Escalating Oral Vitamin D Replacement on HOMA-IR in Vitamin D Deficient Type 2 Diabetics NCT04183257	King Edward Medical University	Phase 4
Completed	Effect of Vitamin D3 Supplementation in Children From 12 to 30 Months of Age. NCT03544671	Instituto Nacional de Salud Publica, Mexico	N/A

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