- 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 385–408
of 438
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
- Postmenopausal Osteoporosis
- Interventions
- Teriparatide, Risedronate, Placebo, Calcium, Vitamin D
- Drug
- Lead sponsor
- Eli Lilly and Company
- Industry
- Eligibility
- 45 Years and older · Female only
- Enrollment
- 1,366 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2016
- U.S. locations
- 30
- States / cities
- Birmingham, Alabama • Concord, California • Fresno, California + 27 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
- 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
- Chronic Renal Insufficiency, Proteinuria
- Interventions
- Vitamin D, Placebo
- Drug · Other
- Lead sponsor
- Albert Einstein College of Medicine
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 74 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2014
- U.S. locations
- 1
- States / cities
- The Bronx, New York
- 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
- Osteoporosis, Postmenopausal, Osteoporosis, Osteoporotic Fractures
- Interventions
- denosumab, Placebo, Calcium and Vitamin D
- Drug · Dietary Supplement
- Lead sponsor
- Susan L. Greenspan
- Other
- Eligibility
- 65 Years and older
- Enrollment
- 201 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2023
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- Premature Infants
- Interventions
- Vitamin D, Placebo
- Dietary Supplement
- Lead sponsor
- Baylor College of Medicine
- Other
- Eligibility
- Not listed
- Enrollment
- 39 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2016
- U.S. locations
- 1
- States / cities
- Houston, Texas
- 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
- 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
- Infertility, Vitamin D Deficiency
- Interventions
- Not listed
- Lead sponsor
- Northwestern University
- Other
- Eligibility
- 18 Years to 38 Years · Female only
- Enrollment
- 102 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2014
- U.S. locations
- 3
- States / cities
- Chicago, Illinois
- 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
- Exercise-related Amenorrhea
- Interventions
- Transdermal 17Beta-estradiol, progesterone, Ethinyl Estradiol + Desogestrel, Sham Comparator
- Drug · Dietary Supplement
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 14 Years to 21 Years · Female only
- Enrollment
- 121 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2021
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- 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
- 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
- Conditions
- CKD Stage 3/4
- Interventions
- Vitamin D 2mg daily for 2 weeks oral paricalcitol, Placebo
- Drug
- Lead sponsor
- University of Illinois at Chicago
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 8 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2012
- U.S. locations
- 1
- States / cities
- Chicago, Illinois
- Conditions
- Age-related Macular Degeneration
- Interventions
- Omega-3 fatty acids (fish oil), Vitamin D3, Vitamin D3 placebo, Fish oil placebo
- Drug · Dietary Supplement
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 25,871 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2024
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Type 1 Diabetes, Heart Disease
- Interventions
- Vitamin E, Dummy pills
- Dietary Supplement · Other
- Lead sponsor
- University of Pittsburgh
- Other
- Eligibility
- 30 Years and older
- Enrollment
- 87 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- Osteoporosis
- Interventions
- Teriparatide, Alendronate, Calcium, Vitamin D, Placebo-Oral, Placebo-SC
- Drug · Dietary Supplement
- Lead sponsor
- Eli Lilly and Company
- Industry
- Eligibility
- 45 Years to 85 Years · Female only
- Enrollment
- 203 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2001 – 2003
- U.S. locations
- 15
- States / cities
- Mobile, Alabama • Tustin, California • Lakewood, Colorado + 12 more
- Conditions
- HIV-associated Co-morbidities
- Interventions
- conventional vitamin D treatment, tiered/titrated vitamin D dosing
- Dietary Supplement · Drug
- Lead sponsor
- Andrea Branch
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 62 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Respiratory Infection
- Interventions
- Vitamin D3 (cholecalciferol), Placebo Sugar Pill
- Dietary Supplement
- Lead sponsor
- University of Iowa
- Other
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 98 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2010
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa