- Conditions
- Prostate Cancer
- Interventions
- Vitamin D3, Placebo
- Drug
- Lead sponsor
- VA Office of Research and Development
- Federal
- Eligibility
- 19 Years to 90 Years · Male only
- Enrollment
- 130 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2020
- U.S. locations
- 2
- States / cities
- Charleston, South Carolina
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 966
matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
- Conditions
- Morbid Obesity
- Interventions
- Bariatric surgery.
- Procedure
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- Not listed
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2014
- U.S. locations
- 2
- States / cities
- Los Angeles, California
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 9 Years to 14 Years
- Enrollment
- 691 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2013
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Healthy, no Evidence of Disease, Skin Cancer
- Interventions
- cholecalciferol
- Drug
- Lead sponsor
- National Cancer Institute (NCI)
- NIH
- Eligibility
- 40 Years and older
- Enrollment
- 25 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Tucson, Arizona
- Conditions
- Atherosclerosis
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Rockefeller University
- Other
- Eligibility
- 18 Years to 85 Years
- Enrollment
- 150 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Secondary Hyperparathyroidism, Chronic Kidney Disease
- Interventions
- Etelcalcetide, Standard of Care
- Drug · Other
- Lead sponsor
- Amgen
- Industry
- Eligibility
- 0 Years to 18 Years
- Enrollment
- 56 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2029
- U.S. locations
- 10
- States / cities
- Los Angeles, California • Aurora, Colorado • Kansas City, Missouri + 7 more
- Conditions
- Alopecia Areata
- Interventions
- Not listed
- Lead sponsor
- Avera McKennan Hospital & University Health Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 10 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Sioux Falls, South Dakota
- Conditions
- Kidney Transplantation, Vitamin D Deficiency
- Interventions
- Standard vitamin D3 treatment, High dose vitamin D3 treatment
- Dietary Supplement
- Lead sponsor
- University of Nebraska
- Other
- Eligibility
- 19 Years and older
- Enrollment
- 116 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2023
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Magnesium Deficiency, Calcium Metabolism Disorders
- Interventions
- vitamin D3
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 30 Years to 75 Years · Female only
- Enrollment
- 39 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2014
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Systemic Lupus Erythematosus
- Interventions
- Vitamin D3 6000 IU, Vitamin D3 400 IU
- Drug
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
- NIH
- Eligibility
- 5 Years to 20 Years
- Enrollment
- 7 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2014
- U.S. locations
- 13
- States / cities
- Los Angeles, California • Palo Alto, California • San Francisco, California + 9 more
- Conditions
- Cognitive Decline
- Interventions
- vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, Fish oil placebo
- Dietary Supplement · Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 60 Years to 92 Years
- Enrollment
- 3,424 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2021
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Prostate Cancer
- Interventions
- calcitriol, dexamethasone, protein expression analysis, laboratory biomarker analysis
- Dietary Supplement · Drug · Genetic + 1 more
- Lead sponsor
- Roswell Park Cancer Institute
- Other
- Eligibility
- Up to 120 Years · Male only
- Enrollment
- 18 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2010
- U.S. locations
- 1
- States / cities
- Buffalo, New York
- Conditions
- Metabolic Syndrome
- Interventions
- Professional nutrition counseling, No professional nutrition counseling
- Other
- Lead sponsor
- Madigan Army Medical Center
- Federal
- Eligibility
- 18 Years to 45 Years
- Enrollment
- 138 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2019 – 2021
- U.S. locations
- 1
- States / cities
- Tacoma, Washington
- Conditions
- Hypovitaminosis D, Insulin Resistance, Diabetes
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Bastyr University
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 66 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2011
- U.S. locations
- 2
- States / cities
- Kailua-Kona, Hawaii • Kenmore, Washington
- Conditions
- Healthy Volunteers
- Interventions
- Placebo, Canagliflozin
- Drug
- Lead sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- NIH
- Eligibility
- 18 Years and older
- Enrollment
- 67 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2019
- U.S. locations
- 1
- States / cities
- Bethesda, Maryland
- Conditions
- Vitamin D Deficiency, Hematopoietic Stem Cell Transplantation (HSCT)
- Interventions
- Oral Thin Film (OTF) Cholecalciferol (Vitamin D3)
- Dietary Supplement
- Lead sponsor
- Children's Hospital Medical Center, Cincinnati
- Other
- Eligibility
- Not listed
- Enrollment
- 24 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2022
- U.S. locations
- 1
- States / cities
- Cincinnati, Ohio
- Conditions
- Precancerous/Nonmalignant Condition, Prostate Cancer
- Interventions
- calcitriol, observation
- Dietary Supplement · Procedure
- Lead sponsor
- Rutgers, The State University of New Jersey
- Other
- Eligibility
- 18 Years and older · Male only
- Enrollment
- 12 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2004 – 2011
- U.S. locations
- 5
- States / cities
- East Brunswick, New Jersey • Morristown, New Jersey • New Brunswick, New Jersey + 1 more
- Conditions
- Type 1 Diabetes
- Interventions
- Ergocalciferol, Placebo
- Drug · Other
- Lead sponsor
- Benjamin U. Nwosu, MD
- Other
- Eligibility
- 10 Years to 21 Years
- Enrollment
- 48 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2021
- U.S. locations
- 1
- States / cities
- Worcester, Massachusetts
- Conditions
- Osteoporosis, Hypomagnesemia
- Interventions
- EffCaMgCit, Placebo
- Drug · Other
- Lead sponsor
- University of Texas Southwestern Medical Center
- Other
- Eligibility
- 21 Years to 99 Years
- Enrollment
- 62 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2019 – 2021
- U.S. locations
- 1
- States / cities
- Dallas, Texas
- Conditions
- Type 2 Diabetes Mellitus
- Interventions
- Vitamin D3 2000 international units daily, Vitamin C 500mg daily
- Dietary Supplement
- Lead sponsor
- ProMedica Health System
- Other
- Eligibility
- 21 Years to 75 Years
- Enrollment
- 37 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2010
- U.S. locations
- 3
- States / cities
- Sylvania, Ohio • Toledo, Ohio
- Conditions
- Postmenopausal Women
- Interventions
- 10 vit. D deficient subjects take vit. D for 3 months.
- Procedure
- Lead sponsor
- University of Kansas
- Other
- Eligibility
- 50 Years to 90 Years · Female only
- Enrollment
- 40 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2004 – 2007
- U.S. locations
- 1
- States / cities
- Kansas City, Kansas
- Conditions
- Obesity, Glucose Intolerance, Inflammation
- Interventions
- Placebo, Vitamin D 3 cholecalciferol
- Dietary Supplement
- Lead sponsor
- University of Missouri-Columbia
- Other
- Eligibility
- 9 Years to 19 Years
- Enrollment
- 44 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2013
- U.S. locations
- 1
- States / cities
- Columbia, Missouri
- Conditions
- Secondary Hyperparathyroidism, Chronic Kidney Disease
- Interventions
- Cinacalcet, active vitamin D analogue
- Other
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 92 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Lynchburg, Virginia
- Conditions
- Chronic Kidney Disease Stages 3-5
- Interventions
- Ergocalciferol supplementation
- Drug
- Lead sponsor
- Kaiser Permanente
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 6 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Los Angeles, California