- Conditions
- Vitamin D Deficiency, Hepatocellular Carcinoma
- Interventions
- Vitamin D3 4000 IU, Vitamin D3 2000 IU
- Drug
- Lead sponsor
- Andrea Branch
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- New York, New York
Search Results
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Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.
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Showing 1–24
of 340
matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
- Conditions
- HIV Infection
- Interventions
- Vitamin D3 50,000 IU, Vitamin D3 placebo
- Dietary Supplement
- Lead sponsor
- University of North Carolina, Chapel Hill
- Other
- Eligibility
- 16 Years to 24 Years
- Enrollment
- 214 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2016
- U.S. locations
- 16
- States / cities
- Los Angeles, California • Washington D.C., District of Columbia • Fort Lauderdale, Florida + 11 more
- Conditions
- Deficiency of Vitamin D3, COPD
- Interventions
- Cholecalciferol, multivitamin, Placebo
- Dietary Supplement
- Lead sponsor
- University of Pittsburgh
- Other
- Eligibility
- 50 Years to 85 Years
- Enrollment
- 10 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2018
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- Vitamin D Deficiency
- Interventions
- Prenatal Vitamin, Cholecalciferol (Vitamin D3)
- Drug
- Lead sponsor
- Children's Hospital Medical Center, Cincinnati
- Other
- Eligibility
- 18 Years to 45 Years · Female only
- Enrollment
- 192 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2012
- U.S. locations
- 1
- States / cities
- Cincinnati, Ohio
- Conditions
- Healthy, Vitamin D Deficiency
- Interventions
- ergocalciferol, placebo pill
- Dietary Supplement · Other
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 9 Years to 18 Years · Female only
- Enrollment
- 90 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Craniocerebral Trauma, Intracranial Aneurysm, Brain Neoplasms, Spinal Cord Injuries, Seizures, Meningitis, Stroke, Intracranial Hemorrhages, Critical Illness, Vitamin d Deficiency
- Interventions
- Cholecalciferol, Placebo
- Drug · Other
- Lead sponsor
- University of Utah
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 274 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2018
- U.S. locations
- 1
- States / cities
- Salt Lake City, Utah
- Conditions
- Lead Poisoning, Vitamin D Deficiency
- Interventions
- d-penicillamine, placebo
- Device · Drug
- Lead sponsor
- FDA Office of Orphan Products Development
- Federal
- Eligibility
- 6 Months to 16 Years
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 2007
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Obesity, Vitamin D Deficiency
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- University of Pittsburgh
- Other
- Eligibility
- 10 Years to 18 Years
- Enrollment
- 225 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2013 – 2018
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- Rickets
- Interventions
- Not listed
- Lead sponsor
- Agency for Healthcare Research and Quality (AHRQ)
- Federal
- Eligibility
- 6 Months to 15 Months
- Enrollment
- 246 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2006 – 2008
- U.S. locations
- 1
- States / cities
- Seattle, Washington
- Conditions
- Hypophosphatemia, Familial, Hyperparathyroidism
- Interventions
- Paricalcitol, Placebo
- Drug · Other
- Lead sponsor
- Yale University
- Other
- Eligibility
- 9 Years and older
- Enrollment
- 33 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2012
- U.S. locations
- 1
- States / cities
- New Haven, Connecticut
- Conditions
- Cardiovascular Disease, Vitamin D Deficiency
- Interventions
- Vitamin D3, Placebo
- Dietary Supplement
- Lead sponsor
- Intermountain Health Care, Inc.
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 150 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2015 – 2020
- U.S. locations
- 1
- States / cities
- Murray, Utah
- Conditions
- Multiple Sclerosis, Vitamin D Deficiency
- Interventions
- Cholecalciferol
- Drug
- Lead sponsor
- Johns Hopkins University
- Other
- Eligibility
- 18 Years to 55 Years
- Enrollment
- 40 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Baltimore, Maryland
- Conditions
- Vitamin D Deficiency, Orthostatic Intolerance, Nausea
- Interventions
- vitamin D supplement
- Dietary Supplement
- Lead sponsor
- Wake Forest University Health Sciences
- Other
- Eligibility
- 10 Years to 18 Years
- Enrollment
- 31 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2022
- U.S. locations
- 1
- States / cities
- Winston-Salem, North Carolina
- Conditions
- X-linked Hypophosphatemia
- Interventions
- burosumab
- Biological
- Lead sponsor
- Kyowa Kirin, Inc.
- Industry
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 14 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2015 – 2018
- U.S. locations
- 5
- States / cities
- San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more
- Conditions
- Vitamin D Deficiency, Cystic Fibrosis
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- University of Southern California
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 6 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2022
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- Vitamin D Deficiency, Obesity, Type 2 Diabetes Mellitus, Intestinal Permeability
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Fred Hutchinson Cancer Center
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 18 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2013
- U.S. locations
- 1
- States / cities
- Seattle, Washington
- Conditions
- Vitamin D Deficiency, Rotator Cuff Tears
- Interventions
- Vitamin D3 supplementation, Placebo
- Dietary Supplement · Other
- Lead sponsor
- Community Memorial Health System
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 240 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2024
- U.S. locations
- 2
- States / cities
- Ventura, California
- Conditions
- Type 2 Diabetes
- Interventions
- Vitamin D, Placebo
- Drug
- Lead sponsor
- University of Florida
- Other
- Eligibility
- 30 Years to 65 Years
- Enrollment
- 76 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2015
- U.S. locations
- 1
- States / cities
- Gainesville, Florida
- Conditions
- X-linked Hypophosphatemia
- Interventions
- Placebo, KRN23
- Drug
- Lead sponsor
- Kyowa Kirin Co., Ltd.
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 42 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2013
- U.S. locations
- 4
- States / cities
- New Haven, Connecticut • Indianapolis, Indiana • Durham, North Carolina + 1 more
- Conditions
- Vitamin D Deficiency
- Interventions
- cholecalciferol
- Dietary Supplement
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 61 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Thyroid, PD-1, Cancer
- Interventions
- blood draw and questionnaire completion, questionnaire completion, blood collection
- Other
- Lead sponsor
- Icahn School of Medicine at Mount Sinai
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 17 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2028
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Spinal Muscular Atrophy, Fragile X Syndrome, Fragile X - Premutation, Duchenne Muscular Dystrophy, Hyperinsulinemic Hypoglycemia, Familial 1, Diabetes Mellitus, Adrenoleukodystrophy, Neonatal, Medium-chain Acyl-CoA Dehydrogenase Deficiency, Very Long Chain Acyl Coa Dehydrogenase Deficiency, Beta-ketothiolase Deficiency, Severe Combined Immunodeficiency Due to Adenosine Deaminase Deficiency, Primary Hyperoxaluria Type 1, Congenital Bile Acid Synthesis Defect Type 2, Pyridoxine-Dependent Epilepsy, Hereditary Fructose Intolerance, Hypophosphatasia, Hyperargininemia, Mucopolysaccharidosis Type 6, Argininosuccinic Aciduria, Citrullinemia, Type I, Wilson Disease, Maple Syrup Urine Disease, Type 1A, Maple Syrup Urine Disease, Type 1B, Biotinidase Deficiency, Neonatal Severe Primary Hyperparathyroidism, Intrinsic Factor Deficiency, Usher Syndrome Type 1D/F Digenic (Diagnosis), Cystic Fibrosis, Stickler Syndrome Type 2, Stickler Syndrome Type 1, Alport Syndrome, Autosomal Recessive, Alport Syndrome, X-Linked, Carbamoyl Phosphate Synthetase I Deficiency Disease, Carnitine Palmitoyl Transferase 1A Deficiency, Carnitine Palmitoyltransferase II Deficiency, Cystinosis, Chronic Granulomatous Disease, Cerebrotendinous Xanthomatoses, Maple Syrup Urine Disease, Type 2, Severe Combined Immunodeficiency Due to DCLRE1C Deficiency, Thyroid Dyshormonogenesis 6, Thyroid Dyshormonogenesis 5, Supravalvar Aortic Stenosis, Factor X Deficiency, Hemophilia A, Hemophilia B, Tyrosinemia, Type I, Fructose 1,6 Bisphosphatase Deficiency, Glycogen Storage Disease Type I, G6PD Deficiency, Glycogen Storage Disease II, Galactokinase Deficiency, Mucopolysaccharidosis Type IV A, Galactosemias, Guanidinoacetate Methyltransferase Deficiency, Agat Deficiency, Glutaryl-CoA Dehydrogenase Deficiency, Gtp Cyclohydrolase I Deficiency, Hyperinsulinism-Hyperammonemia Syndrome, Primary Hyperoxaluria Type 2, 3-Hydroxyacyl-CoA Dehydrogenase Deficiency, Long-chain 3-hydroxyacyl-CoA Dehydrogenase Deficiency, Mitochondrial Trifunctional Protein Deficiency, Sickle Cell Disease, Beta-Thalassemia, Holocarboxylase Synthetase Deficiency, 3-Hydroxy-3-Methylglutaric Aciduria, Primary Hyperoxaluria Type 3, Hermansky-Pudlak Syndrome 1, Hermansky-Pudlak Syndrome 4, Apparent Mineralocorticoid Excess, HSDB, CBAS1, Mucopolysaccharidosis Type 2, Mucopolysaccharidosis Type 1, Severe Combined Immunodeficiency, X Linked, Severe Combined Immunodeficiency Due to IL-7Ralpha Deficiency, Diabetes Mellitus, Permanent Neonatal, Isovaleric Acidemia, Severe Combined Immunodeficiency T-Cell Negative B-Cell Positive Due to Janus Kinase-3 Deficiency (Disorder), Jervell and Lange-Nielsen Syndrome 2, Hyperinsulinemic Hypoglycemia, Familial, 2, Diabetes Mellitus, Permanent Neonatal, With Neurologic Features, Jervell and Lange-Nielsen Syndrome 1, Lysosomal Acid Lipase Deficiency, CblF, 3-Methylcrotonyl CoA Carboxylase 1 Deficiency, 3-Methylcrotonyl CoA Carboxylase 2 Deficiency, Waardenburg Syndrome Type 2A, Methylmalonic Aciduria cblA Type, Methylmalonic Aciduria cblB Type, Methylmalonic Aciduria and Homocystinuria Type cblC, MAHCD, Methylmalonic Aciduria Due to Methylmalonyl-CoA Mutase Deficiency, Congenital Disorder of Glycosylation Type 1B, Mthfr Deficiency, Methylcobalamin Deficiency Type Cbl G (Disorder), Methylcobalamin Deficiency Type cblE, Usher Syndrome, Type 1B, N-acetylglutamate Synthase Deficiency, Ornithine Transcarbamylase Deficiency, Phenylketonurias, Waardenburg Syndrome Type 1, Congenital Hypothyroidism, Propionic Acidemia, Usher Syndrome, Type 1F, Pancreatic Agenesis 1, Hereditary Hypophosphatemic Rickets, Glycogen Storage Disease IXB, Glycogen Storage Disease IXC, MOWS, Epilepsy, Early-Onset, Vitamin B6-Dependent, Pyridoxal Phosphate-Responsive Seizures, Pituitary Hormone Deficiency, Combined, 1, Ptsd, Dihydropteridine Reductase Deficiency, Severe Combined Immunodeficiency Due to RAG1 Deficiency, Severe Combined Immunodeficiency Due to RAG2 Deficiency, Retinoblastoma, Multiple Endocrine Neoplasia Type 2B, Pseudohypoaldosteronism, Type I, Liddle Syndrome, Biotin-Responsive Basal Ganglia Disease, SCD, DIAR1, GSD1C, Acrodermatitis Enteropathica, Thyroid Dyshormonogenesis 1, Riboflavin Transporter Deficiency, Waardenburg Syndrome, Type 2E, SRD, Congenital Lipoid Adrenal Hyperplasia Due to STAR Deficiency, Barth Syndrome, Adrenocorticotropic Hormone Deficiency, Transcobalamin II Deficiency, Thyroid Dyshormonogenesis 3, Segawa Syndrome, Autosomal Recessive, Autosomal Recessive Nonsyndromic Hearing Loss, Thyroid Dyshormonogenesis 2A, Congenital Isolated Thyroid Stimulating Hormone Deficiency, Hypothyroidism Due to TSH Receptor Mutations, Usher Syndrome Type 1C, Usher Syndrome Type 1G (Diagnosis), Von Willebrand Disease, Type 3, Combined Immunodeficiency Due to ZAP70 Deficiency, Adenine Phosphoribosyltransferase Deficiency, Metachromatic Leukodystrophy, Canavan Disease, Menkes Disease, Carbonic Anhydrase VA Deficiency, Developmental and Epileptic Encephalopathy 2, 17 Alpha-Hydroxylase Deficiency, Smith-Lemli-Opitz Syndrome, Krabbe Disease, Glutathione Synthetase Deficiency, Mucopolysaccharidosis Type 7, Rett Syndrome, Molybdenum Cofactor Deficiency, Type A, Niemann-Pick Disease, Type C1, Niemann-Pick Disease Type C2, Ornithine Aminotransferase Deficiency, 3-Phosphoglycerate Dehydrogenase Deficiency, Leber Congenital Amaurosis 2, Dravet Syndrome, Mucopolysaccharidosis Type 3 A, Ornithine Translocase Deficiency, Carnitine-acylcarnitine Translocase Deficiency, Glucose Transporter Type 1 Deficiency Syndrome, Creatine Transporter Deficiency, Niemann-Pick Disease Type A, Pitt Hopkins Syndrome, Tuberous Sclerosis 1, Tuberous Sclerosis 2, Ataxia With Isolated Vitamin E Deficiency, Angelman Syndrome, Prader-Willi Syndrome, Homocystinuria, Permanent Neonatal Diabetes Mellitus, Transient Neonatal Diabetes Mellitus, Factor VII Deficiency, Glycogen Storage Disease Type IXA1, Glycogen Storage Disease, Type IXA2, Glycogen Storage Disease IC, Glycogen Storage Disease Type IB, Central Hypoventilation Syndrome With or Without Hirschsprung Disease
- Interventions
- Confirmatory Testing
- Diagnostic Test
- Lead sponsor
- RTI International
- Other
- Eligibility
- 1 Day to 31 Days
- Enrollment
- 30,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018 – 2026
- U.S. locations
- 1
- States / cities
- Research Triangle Park, North Carolina
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D drops, 200 or 400 or 600 IU/day or 800 IU/day
- Dietary Supplement
- Lead sponsor
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- NIH
- Eligibility
- 3 Weeks to 5 Weeks
- Enrollment
- 398 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2006 – 2011
- U.S. locations
- 1
- States / cities
- Coralville, Iowa
- Conditions
- Type 2 Diabetes, Vitamin D Deficiency
- Interventions
- Vitamin D2, Sugar pill
- Dietary Supplement · Other
- Lead sponsor
- University of Alabama at Birmingham
- Other
- Eligibility
- 12 Years to 18 Years
- Enrollment
- 31 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2013
- U.S. locations
- 1
- States / cities
- Birmingham, Alabama