- Conditions
- Vitamin D Deficiency, End Stage Renal Disease
- Interventions
- Not listed
- Lead sponsor
- Winthrop University Hospital
- Other
- Eligibility
- 18 Years to 85 Years
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2012
- U.S. locations
- 2
- States / cities
- Mineola, 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 25–48
of 24
matching trials from the live ClinicalTrials.gov search.
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- Conditions
- Hypovitaminosis D
- Interventions
- vitamin D supplementation
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 18 Years and older
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 2005
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Nephrolithiasis, Urolithiasis, Idiopathic Hypercalciuria, Vitamin D Deficiency, Disorder of Vitamin D
- Interventions
- Ergocalciferol
- Drug
- Lead sponsor
- New York Presbyterian Hospital
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Vitamin D Deficiency, Sarcopenia
- Interventions
- vitamin D3, Placebo
- Dietary Supplement · Other
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 60 Years to 85 Years
- Enrollment
- 100 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2015 – 2018
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Vitamin D Deficiency, Obesity
- Interventions
- Not listed
- Lead sponsor
- University of Massachusetts, Worcester
- Other
- Eligibility
- 3 Years to 12 Years
- Enrollment
- 45 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2012
- U.S. locations
- 1
- States / cities
- Worcester, Massachusetts
- Conditions
- Asthma, Vitamin D Deficiency
- Interventions
- Vitamin D2 + vitamin D3, Vitamin D3
- Drug
- Lead sponsor
- Nationwide Children's Hospital
- Other
- Eligibility
- 8 Years to 17 Years
- Enrollment
- 18 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2016
- U.S. locations
- 1
- States / cities
- Columbus, Ohio
- Conditions
- Heart Failure, Vitamin D Deficiency, Cardiomyopathy, Congestive Heart Failure
- Interventions
- Placebo Comparator: Sugar Pill, Vitamin D3 (cholecalciferol)
- Drug
- Lead sponsor
- Heidi Moretti, MS, RD
- Other
- Eligibility
- Not listed
- Enrollment
- 40 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2015
- U.S. locations
- 2
- States / cities
- Missoula, Montana
- Conditions
- Vitamin D Deficiency
- Interventions
- Softgel Vitamin D3, Nano Liquid Vitamin D3, 25(OH)D Blood Serum Test, Placebo Control
- Dietary Supplement · Diagnostic Test · Other
- Lead sponsor
- Inspired Life Medical, Inc.
- Industry
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 114 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021
- U.S. locations
- 1
- States / cities
- Le Sueur, Minnesota
- Conditions
- Osteoporosis, Aging
- Interventions
- Vitamin D3, Calcium Citrate (Citracal)
- Dietary Supplement
- Lead sponsor
- Creighton University
- Other
- Eligibility
- 57 Years and older · Female only
- Enrollment
- 273 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2011
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Respiratory Infection
- Interventions
- High Dose Vitamin D, Standard Dose Vitamin D, Placebo, Usual Care
- Drug · Dietary Supplement
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 60 Years and older
- Enrollment
- 107 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2016
- U.S. locations
- 1
- States / cities
- Aurora, Colorado
- Conditions
- Vitamin D Deficiency
- Interventions
- 1,000 IU vitamin D2, placebo capsule, mushrooms, UVB-treated mushrooms, 400 IU vitamin D2, UVB-treated mushrooms, 1,000 IU vitamin D2
- Dietary Supplement · Other
- Lead sponsor
- USDA, Western Human Nutrition Research Center
- Federal
- Eligibility
- 20 Years to 59 Years
- Enrollment
- 48 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Davis, California
- Conditions
- Familial Hypophosphatemic Rickets
- Interventions
- Cinacalcet
- Drug
- Lead sponsor
- Children's Mercy Hospital Kansas City
- Other
- Eligibility
- 5 Years to 21 Years
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2012
- U.S. locations
- 1
- States / cities
- Kansas City, Missouri
- Conditions
- Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Columbia University
- Other
- Eligibility
- 5 Years to 11 Years
- Enrollment
- 6 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2019
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Mayo Clinic
- Other
- Eligibility
- 12 Years to 18 Years
- Enrollment
- 20 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Rochester, Minnesota
- Conditions
- Vitamin D Deficiency
- Interventions
- Dose 1, Dose 2
- Drug
- Lead sponsor
- University of Minnesota
- Other
- Eligibility
- 18 Years to 85 Years
- Enrollment
- 10 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2017
- U.S. locations
- 1
- States / cities
- Saint Paul, Minnesota
- Conditions
- Postmenopausal, Vitamin D Deficiency
- Interventions
- Dual isotope technique
- Other
- Lead sponsor
- Winthrop University Hospital
- Other
- Eligibility
- 50 Years to 70 Years · Female only
- Enrollment
- 76 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Mineola, New York
- Conditions
- Vitamin D Deficiency
- Interventions
- Not listed
- Lead sponsor
- Fujirebio Diagnostics, Inc.
- Industry
- Eligibility
- Not listed
- Enrollment
- 482 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2015
- U.S. locations
- 1
- States / cities
- Mountain View, California
- Conditions
- Impaired Fasting Glucose, Impaired Glucose Tolerance, Vitamin D Insufficiency
- Interventions
- Placebo, 50K vitamin D2
- Drug
- Lead sponsor
- US Department of Veterans Affairs
- Federal
- Eligibility
- 35 Years to 85 Years · Male only
- Enrollment
- 205 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2014
- U.S. locations
- 1
- States / cities
- Chicago, Illinois
- Conditions
- Vitamin D Deficiency
- Interventions
- 400 IU Vitamin D3 (cholecalciferol), 2400 IU Vitamin D3 (cholecalciferol), 6400 IU Vitamin D3 (cholecalciferol)
- Drug
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 18 Years to 45 Years · Female only
- Enrollment
- 460 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2006 – 2012
- U.S. locations
- 2
- States / cities
- Rochester, New York • Charleston, South Carolina
- Conditions
- Vitamin D Deficiency, Hypovitaminosis A, Vitamin E Deficiency
- Interventions
- Vitamin D, Vitamin D, Vitamin E, and Vitamin A, Control, 700 mg Calcium
- Dietary Supplement
- Lead sponsor
- Boston University
- Other
- Eligibility
- 6 Years to 10 Years
- Enrollment
- 180 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2005 – 2008
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Vitamin D Deficiency
- Interventions
- Cholecalciferol
- Dietary Supplement
- Lead sponsor
- Augusta University
- Other
- Eligibility
- 13 Years to 45 Years
- Enrollment
- 74 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Augusta, Georgia
- 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
- Acute Respiratory Distress Syndrome, Vitamin D Deficiency, Critical Illness
- Interventions
- Vitamin D3, Placebo
- Drug
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 1,358 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2018
- U.S. locations
- 47
- States / cities
- Fresno, California • Los Angeles, California • Sacramento, California + 34 more
- Conditions
- Vitamin D Deficiency, Burns
- Interventions
- Ergocalciferol Capsules
- Drug
- Lead sponsor
- University of Texas Southwestern Medical Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 48 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2025
- U.S. locations
- 1
- States / cities
- Dallas, Texas