- 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
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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 98
matching trials from the live ClinicalTrials.gov search.
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- 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 Kidney Diseases, Deficiency, Vitamin D
- Interventions
- Cholecalciferol
- Dietary Supplement
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 23 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2019
- U.S. locations
- 2
- States / cities
- Aurora, Colorado • Pittsburgh, Pennsylvania
- Conditions
- Hyperphosphatemia
- Interventions
- Niacinamide, Placebo
- Drug
- Lead sponsor
- Washington University School of Medicine
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 17 participants
- Timeline
- 2006 – 2007
- U.S. locations
- 1
- States / cities
- St Louis, Missouri
- 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
- End Stage Renal Disease
- Interventions
- Not listed
- Lead sponsor
- University of Alberta
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2017
- U.S. locations
- 3
- States / cities
- Indianapolis, Indiana • Boston, Massachusetts • Seattle, Washington
- Conditions
- Chronic Kidney Disease
- Interventions
- cholecalciferol, doxercalciferol, placebo
- Dietary Supplement
- Lead sponsor
- Indiana University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 100 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2012
- U.S. locations
- 1
- States / cities
- Indianapolis, Indiana
- Conditions
- Coronary Artery Disease, Chronic Kidney Disease, Hypovitaminosis D, Secondary Hyperparathyroidism
- Interventions
- paricalcitol, placebo
- Drug
- Lead sponsor
- Thomas Jefferson University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 10 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- Chronic Kidney Disease
- Interventions
- 1000 IU of Vitamin D3, 4000 IU of Vitamin D3
- Drug
- Lead sponsor
- Emory University
- Other
- Eligibility
- 9 Years to 21 Years
- Enrollment
- 98 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2014
- U.S. locations
- 1
- States / cities
- Atlanta, Georgia
- Conditions
- Vitamin D Deficiency
- Interventions
- cholecalciferol, Placebo
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 50 Years to 100 Years · Female only
- Enrollment
- 62 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2014
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Vitamin D Insufficiency, Vitamin D Deficiency
- Interventions
- Pharmacist Education about Vitamin D
- Behavioral
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 65 Years to 89 Years
- Enrollment
- 80 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2005 – 2006
- U.S. locations
- 1
- States / cities
- Aurora, Colorado
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D2, Vitamin D3
- Dietary Supplement
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 300 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2020
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- Chronic Kidney Disease, Hyperparathyroidism, Secondary, Vitamin D Deficiency
- Interventions
- CTAP101 30 μg capsules, Sugar pill to CTAP101 30 μg capsules
- Drug · Other
- Lead sponsor
- OPKO IP Holdings II, Inc.
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 216 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2014
- U.S. locations
- 1
- States / cities
- Bannockburn, Illinois
- Conditions
- Diabetic Nephropathy, Chronic Kidney Disease
- Interventions
- Zemplar (paricalcitol) capsules, Placebo
- Drug
- Lead sponsor
- Abbott
- Industry
- Eligibility
- 20 Years and older
- Enrollment
- 281 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2009
- U.S. locations
- 27
- States / cities
- Phoenix, Arizona • Fountain Valley, California • Yuba City, California + 21 more
- Conditions
- Chronic Kidney Disease, Secondary Hyperparathyroidism, Chronic Renal Insufficiency, Chronic Renal Failure
- Interventions
- CTAP101 Capsules, CTAP101 Injection
- Drug
- Lead sponsor
- OPKO IP Holdings II, Inc.
- Industry
- Eligibility
- 18 Years to 80 Years
- Enrollment
- 28 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009
- U.S. locations
- 12
- States / cities
- Peoria, Arizona • Evergreen Park, Illinois • Springfield, Massachusetts + 9 more
- 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
- Conditions
- Chronic Kidney Disease
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- Rockefeller University
- Other
- Eligibility
- 50 Years to 80 Years
- Enrollment
- 12 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2009
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Chronic Kidney Disease, Secondary Hyperparathyroidism, Hemodialysis
- Interventions
- Paricalcitol, Cinacalcet
- Drug
- Lead sponsor
- Abbott
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 272 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2011
- U.S. locations
- 30
- States / cities
- Tempe, Arizona • Chula Vista, California • Los Angeles, California + 22 more
- Conditions
- Vitamin D Deficiency, Vitamin D Insufficiency
- Interventions
- Vitamin D, Placebo, Standard of Care
- Dietary Supplement · Other
- Lead sponsor
- Johns Hopkins University
- Other
- Eligibility
- 18 Years to 64 Years
- Enrollment
- 70 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017
- U.S. locations
- 1
- States / cities
- Baltimore, Maryland
- Conditions
- Transplant; Failure, Kidney, Renal Disease, End Stage, Hyperparathyroidism, Secondary
- Interventions
- Paricalcitol, Corticosteroid Avoidance Immune Suppression Protocol
- Drug · Other
- Lead sponsor
- Mayo Clinic
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 100 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2011
- U.S. locations
- 2
- States / cities
- Scottsdale, Arizona • Rochester, Minnesota
- Conditions
- Arterial Dysfunction, Chronic Kidney Disease
- Interventions
- Cholecalciferol, Calcitriol
- Drug
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 18 Years to 80 Years
- Enrollment
- 128 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Aurora, Colorado
- Conditions
- End Stage Renal Disease, Hemodialysis, Inflammatory Response, Cardiovascular Disease
- Interventions
- paricalcitol
- Drug
- Lead sponsor
- Renal Research Institute
- Other
- Eligibility
- 18 Years to 75 Years
- Enrollment
- 20 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2004 – 2007
- U.S. locations
- 3
- States / cities
- New York, New York
- Conditions
- Secondary Hyperparathyroidism, Chronic Kidney Disease
- Interventions
- Paricalcitol, Calcitriol
- Drug
- Lead sponsor
- Washington University School of Medicine
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 110 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2013
- U.S. locations
- 4
- States / cities
- Chicago, Illinois • Evanston, Illinois • Detroit, Michigan + 1 more
- Conditions
- Renal Osteodystrophy, End Stage Renal Disease
- Interventions
- calcitriol, growth hormone
- Drug
- Lead sponsor
- National Center for Research Resources (NCRR)
- NIH
- Eligibility
- 1 Year to 18 Years
- Enrollment
- 109 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 1995
- U.S. locations
- 1
- States / cities
- Los Angeles, California