- Conditions
- ADHD
- Interventions
- Calcitriol, Placebo
- Drug · Other
- Lead sponsor
- Yale University
- Other
- Eligibility
- 18 Years to 50 Years
- Enrollment
- 3 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020
- U.S. locations
- 1
- States / cities
- New Haven, Connecticut
Search Results
Search by objective public record fields.
Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 817–840
of 960
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Insulin Resistance, Obesity, Vitamin D25 Insufficiency
- Interventions
- Vitamin D drops, Placebo drops
- Drug
- Lead sponsor
- Weill Medical College of Cornell University
- Other
- Eligibility
- 7 Years to 18 Years
- Enrollment
- 110 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2012
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Insulin Sensitivity, Flow-mediated Dilation, Arterial Stiffness
- Interventions
- Not listed
- Lead sponsor
- University of Alabama at Birmingham
- Other
- Eligibility
- 19 Years to 60 Years
- Enrollment
- 63 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2013
- U.S. locations
- 1
- States / cities
- Birmingham, Alabama
- Conditions
- Vitamin D Deficiency, Stem Cell Transplant Complications, Pediatric Cancer, Blood Disorder, Pediatric Acute Myeloid Leukemia, Pediatric Acute Lymphoid Leukemia, Myelodysplastic Syndromes, Sickle Cell Anemia in Children, Aplastic Anemia, Thalassemia in Children
- Interventions
- Vitamin D3, Standard Vitamin D3 Supplementation
- Dietary Supplement
- Lead sponsor
- Phoenix Children's Hospital
- Other
- Eligibility
- 1 Year to 25 Years
- Enrollment
- 49 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2019
- U.S. locations
- 1
- States / cities
- Phoenix, Arizona
- Conditions
- Chronic Sinusitis
- Interventions
- vitamin D placebo, Vitamin D
- Dietary Supplement
- Lead sponsor
- University of Chicago
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Chicago, Illinois
- Conditions
- Chronic Kidney Disease stage3, Chronic Kidney Disease stage4, Vitamin d Deficiency, Secondary Hyperparathyroidism
- Interventions
- CTAP101, Placebo
- Drug
- Lead sponsor
- OPKO Health, Inc.
- Industry
- Eligibility
- 8 Years to 17 Years
- Enrollment
- 2 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2023 – 2024
- U.S. locations
- 2
- States / cities
- Columbus, Ohio • Greenville, South Carolina
- Conditions
- Diabetic Kidney Disease
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 54 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Charleston, South Carolina
- Conditions
- HIV-infection/Aids
- Interventions
- Vitamin D3, Placebo
- Dietary Supplement
- Lead sponsor
- Children's Hospital of Philadelphia
- Other
- Eligibility
- 5 Years to 24 Years
- Enrollment
- 58 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2017
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- Vitamin D Deficiency
- Interventions
- Ergocalciferol, Calcitriol
- Dietary Supplement
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 18 Years to 45 Years
- Enrollment
- 42 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- 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
- Renal Insufficiency, Chronic, Kidney Failure, Chronic
- Interventions
- Vitamin D
- Drug
- Lead sponsor
- University of Nebraska
- Other
- Eligibility
- 21 Years to 70 Years
- Enrollment
- 5 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2020
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- Montefiore Medical Center
- Other
- Eligibility
- 13 Years to 20 Years
- Enrollment
- 183 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2013 – 2014
- U.S. locations
- 1
- States / cities
- The Bronx, New York
- Conditions
- Gaucher's Disease, Osteopenia
- Interventions
- alendronate sodium, calcium carbonate, cholecalciferol
- Drug
- Lead sponsor
- Children's Hospital Medical Center, Cincinnati
- Other
- Eligibility
- 18 Years to 50 Years
- Enrollment
- 82 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 1998 – 2002
- U.S. locations
- 2
- States / cities
- Cincinnati, Ohio • Dayton, Ohio
- Conditions
- Femoral Neck Fractures
- Interventions
- Sliding Hip Screw, Cancellous Screws, Vitamin D, Vitamin D Placebo
- Procedure · Drug
- Lead sponsor
- McMaster University
- Other
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 91 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2019
- U.S. locations
- 10
- States / cities
- Phoenix, Arizona • San Francisco, California • Gainesville, Florida + 7 more
- Conditions
- Vitamin D Deficiency, Arterial Stiffness
- Interventions
- Low dose vitamin D3, High dose vitamin D3
- Dietary Supplement
- Lead sponsor
- Texas Tech University Health Sciences Center
- Other
- Eligibility
- 65 Years to 89 Years
- Enrollment
- 52 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018 – 2021
- U.S. locations
- 1
- States / cities
- Lubbock, Texas
- Conditions
- Crohn's Disease (CD), Ulcerative Colitis (UC)
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- University of California, San Francisco
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Fresno, California
- Conditions
- Vitamin D Deficiency
- Interventions
- High Dose Vitamin D3, Low Dose Vitamin D3, Placebo
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- Up to 75 Years · Female only
- Enrollment
- 230 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2014
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Hyperlipidemia
- Interventions
- Vitamin D3, Placebo
- Dietary Supplement · Other
- Lead sponsor
- Avera McKennan Hospital & University Health Center
- Other
- Eligibility
- 18 Years to 88 Years
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Sioux Falls, South Dakota
- Conditions
- Osteoporosis, Nutrition
- Interventions
- Full length Block 2014 Food Frequency Questionnaire, Revised Calcium, Vitamin D and Protein Screener
- Other
- Lead sponsor
- University of Nebraska
- Other
- Eligibility
- 65 Years and older
- Enrollment
- 31 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2018
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Hypovitaminosis D
- Interventions
- Vitamin D3, Calcium, and Vitamin C
- Dietary Supplement
- Lead sponsor
- Atlantic Health System
- Other
- Eligibility
- 6 Years to 21 Years
- Enrollment
- 200 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2027 – 2032
- U.S. locations
- 1
- States / cities
- Morristown, New Jersey
- Conditions
- Vitamin D Deficiency, Secondary Hyperparathyroidism, Obesity
- Interventions
- Ergocalciferol, Cholecalciferol
- Drug
- Lead sponsor
- Weill Medical College of Cornell University
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2006 – 2007
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Vitamin D Deficiency, Preterm Infants, Bronchopulmonary Dysplasia
- Interventions
- Cholecalciferol, Placebo
- Dietary Supplement
- Lead sponsor
- University of Alabama at Birmingham
- Other
- Eligibility
- 1 Minute to 7 Days
- Enrollment
- 100 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2016
- U.S. locations
- 1
- States / cities
- Birmingham, Alabama
- Conditions
- Chronic Kidney Disease
- Interventions
- Vitamin D3, Vitamin D2, Placebo
- Dietary Supplement
- Lead sponsor
- Creighton University
- Other
- Eligibility
- 20 Years to 65 Years
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Hypertension
- Interventions
- Vitamin D-3 (cholecalciferol), 2000 IU, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo
- Dietary Supplement · Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years to 99 Years
- Enrollment
- 25,875 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2026
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts