- Conditions
- COVID-19, Coronavirus, SARS-CoV2 Infection
- Interventions
- Rayaldee, Placebo
- Drug
- Lead sponsor
- OPKO Health, Inc.
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 171 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2020 – 2021
- U.S. locations
- 10
- States / cities
- San Francisco, California • Miami, Florida • Evanston, Illinois + 6 more
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 481–504
of 554
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Parkinson Disease, Accidental Falls
- Interventions
- Vitamin D3, calcium, Placebo
- Drug · Dietary Supplement · Other
- Lead sponsor
- VA Office of Research and Development
- Federal
- Eligibility
- 50 Years to 99 Years
- Enrollment
- 101 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Portland, Oregon
- 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
- Vitamin D Inadequacy, Vitamin D Deficiency
- Interventions
- Cholecalciferol (vitamin D3), Ergocalciferol (vitamin D2), Placebo
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 65 Years and older
- Enrollment
- 64 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2008
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Asthma, Vitamin D Deficiency, Pediatric Obesity
- Interventions
- Vitamin D3 oral regimen
- Dietary Supplement
- Lead sponsor
- IDeA States Pediatric Clinical Trials Network
- Network
- Eligibility
- 6 Years to 17 Years
- Enrollment
- 112 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2021
- U.S. locations
- 15
- States / cities
- Little Rock, Arkansas • Wilmington, Delaware • Honolulu, Hawaii + 12 more
- Conditions
- HIV-1 Infection
- Interventions
- EFV/FTC/TDF, Calcium Carbonate, Vitamin D3, Placebo for calcium carbonate, Placebo for vitamin D3
- Drug
- Lead sponsor
- Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
- Network
- Eligibility
- 18 Years and older
- Enrollment
- 167 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2013
- U.S. locations
- 38
- States / cities
- Birmingham, Alabama • Los Angeles, California • Palo Alto, California + 27 more
- 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
- Pre-Diabetic
- Interventions
- Calcitriol capsules, Oral Placebo
- Drug
- Lead sponsor
- Mayo Clinic
- Other
- Eligibility
- 20 Years to 45 Years
- Enrollment
- 17 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2021
- U.S. locations
- 1
- States / cities
- Rochester, Minnesota
- Conditions
- Maternal Stress
- Interventions
- Vitamin D (Cholecalciferol ), Placebo
- Dietary Supplement · Other
- Lead sponsor
- University of Idaho
- Other
- Eligibility
- 18 Years to 64 Years · Female only
- Enrollment
- 80 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024 – 2027
- U.S. locations
- 2
- States / cities
- Coeur d'Alene, Idaho • Moscow, Idaho
- Conditions
- Adult Acute Megakaryoblastic Leukemia (M7), Adult Acute Monoblastic Leukemia (M5a), Adult Acute Monocytic Leukemia (M5b), Adult Acute Myeloblastic Leukemia With Maturation (M2), Adult Acute Myeloblastic Leukemia Without Maturation (M1), Adult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities, Adult Acute Myeloid Leukemia With Del(5q), Adult Acute Myeloid Leukemia With Inv(16)(p13;q22), Adult Acute Myeloid Leukemia With t(16;16)(p13;q22), Adult Acute Myeloid Leukemia With t(8;21)(q22;q22), Adult Acute Myelomonocytic Leukemia (M4), Adult Erythroleukemia (M6a), Adult Pure Erythroid Leukemia (M6b), Untreated Adult Acute Myeloid Leukemia
- Interventions
- cholecalciferol, pharmacological study, laboratory biomarker analysis
- Dietary Supplement · Other
- Lead sponsor
- Roswell Park Cancer Institute
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 4 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Buffalo, New York
- Conditions
- Dense Breasts
- Interventions
- Denosumab, Placebo, Calcium, Vitamin D3, Core needle biopsy, Blood draw
- Drug · Procedure
- Lead sponsor
- Washington University School of Medicine
- Other
- Eligibility
- 40 Years and older · Female only
- Enrollment
- 210 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2027
- U.S. locations
- 1
- States / cities
- St Louis, Missouri
- Conditions
- Mineral Absorption
- Interventions
- Vitamin D
- Dietary Supplement
- Lead sponsor
- Baylor College of Medicine
- Other
- Eligibility
- 4 Years to 8 Years
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Obesity, Vitamin D Deficiency
- Interventions
- cholecalciferol
- Dietary Supplement
- Lead sponsor
- Creighton University
- Other
- Eligibility
- 19 Years to 60 Years · Male only
- Enrollment
- 67 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- 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
- Polycystic Ovarian Syndrome, Vitamin D Deficiency
- Interventions
- Vitamin D2 (Ergocalciferol), Medroxyprogesterone (Provera), Vitamin D3 (Cholecalciferol), Elemental Calcium
- Dietary Supplement · Drug
- Lead sponsor
- Yale University
- Other
- Eligibility
- 18 Years to 40 Years · Female only
- Enrollment
- 36 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2013
- U.S. locations
- 1
- States / cities
- New Haven, Connecticut
- 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
- Osteoporosis, Cardiac Transplantation
- Interventions
- Alendronate, Calcitriol, Placebo Alendronate, Placebo Calcitriol
- Drug
- Lead sponsor
- Columbia University
- Other
- Eligibility
- 20 Years to 70 Years
- Enrollment
- 149 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 1997 – 2002
- U.S. locations
- 2
- States / cities
- New York, New York
- Conditions
- Vitamin D Deficiency, Pregnancy
- Interventions
- cholecalciferol (vitamin D3), cholecalciferol
- Drug
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 16 Years to 45 Years · Female only
- Enrollment
- 564 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2009
- U.S. locations
- 1
- States / cities
- Columbia, South Carolina
- Conditions
- Prostatic Neoplasms, Prostate Cancer
- Interventions
- Calcitriol, Naproxen-n-butyl nitrate
- Drug
- Lead sponsor
- Stanford University
- Other
- Eligibility
- 18 Years to 90 Years · Male only
- Enrollment
- 20 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2005 – 2007
- U.S. locations
- 1
- States / cities
- Stanford, California
- Conditions
- Pregnancy
- Interventions
- Vitamin D dynamics-pregnant, Vitamin D dynamics-nonpregnant
- Other
- Lead sponsor
- Cornell University
- Other
- Eligibility
- 20 Years to 39 Years · Female only
- Enrollment
- 160 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024 – 2029
- U.S. locations
- 1
- States / cities
- Rochester, New York
- 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
- Depression, Depressive Symptoms, Mood
- Interventions
- vitamin D3, omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D placebo
- Dietary Supplement · Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 18,353 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2025
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Vitamin D Deficiency
- Interventions
- cholecalciferol
- Dietary Supplement
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 50 Years to 69 Years
- Enrollment
- 62 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2012
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Vitamin D Deficiency
- Interventions
- Placebo, 800 IU/day vitamin D supplementation with feedings in the first 28 days after birth, Usual Care
- Dietary Supplement · Other
- Lead sponsor
- The University of Texas Health Science Center, Houston
- Other
- Eligibility
- 24 Hours to 96 Hours
- Enrollment
- 180 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2027
- U.S. locations
- 1
- States / cities
- Houston, Texas