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Showing 25–48 of 53 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 (cholecalciferol), 2000 IU per day Clear all

Conditions: Fractures
Interventions: Vitamin D3 placebo, Fish oil placebo, omega-3 fatty acids (fish oil), Vitamin D3; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2022
U.S. locations: 1
States / cities: Boston, Massachusetts

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: Cardiovascular Disease
Interventions: Vitamin D3, Omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D3 placebo; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,119 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2026
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Cardiovascular Disease
Interventions: Vitamin D3 + fish oil/fish oil placebo, Vitamin D3 placebo + fish oil/fish oil placebo; Dietary Supplement
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 50 Years and older
Enrollment: 1,025 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2021
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin D Deficiency
Interventions: cholecalciferol (vitamin D3), cholecalciferol; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 16 Years to 45 Years · Female only
Enrollment: 501 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2004 – 2010
U.S. locations: 1
States / cities: Charleston, South Carolina

Conditions: Atrophy
Interventions: CaHMB (Dietary supplement, not Drug), CaLa; Drug · Dietary Supplement
Lead sponsor: University of Kansas Medical Center; Other
Eligibility: 18 Years to 45 Years · Female only
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2023 – 2029
U.S. locations: 1
States / cities: Overland Park, Kansas

Conditions: Thalassemia Major
Interventions: Vitamin D3, Placebo; Drug
Lead sponsor: Weill Medical College of Cornell University; Other
Eligibility: 6 Years to 60 Years
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2014
U.S. locations: 1
States / cities: New York, New York

Conditions: Aging
Interventions: Vitamin D3 (cholecalciferol), fish oil; Dietary Supplement · Drug
Lead sponsor: Augusta University; Other
Eligibility: 50 Years and older
Enrollment: 1,054 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2021
U.S. locations: 1
States / cities: Augusta, Georgia

Conditions: Vitamin D Deficiency
Interventions: 400 IU vitamin D3, 2000 IU vitamin D3; Dietary Supplement
Lead sponsor: Boston University; Other
Eligibility: 18 Years to 70 Years
Enrollment: 11 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2012
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: COPD, Asthma, Pulmonary Function, Pneumonia
Interventions: Vitamin D3, fish oil, Vitamin D3 placebo, Fish oil placebo; 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 – 2027
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Spinal Cord Injury
Interventions: Vitamin D and Calcium; Dietary Supplement
Lead sponsor: US Department of Veterans Affairs; Federal
Eligibility: 18 Years to 75 Years
Enrollment: 10 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: The Bronx, New York

Conditions: Hypertension, Vitamin D Deficiency, Pre-Hypertension
Interventions: Cholecalciferol; Drug
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 18 Years to 50 Years
Enrollment: 534 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2013
U.S. locations: 3
States / cities: Hartford, Connecticut • Boston, Massachusetts • Minneapolis, Minnesota

Conditions: Deficiency of Vitamin D3
Interventions: D3 2000 IU/day, D3 4000 IU/day, D3 50,000 IU weekly, vitamin D3 800 IU/day; Dietary Supplement
Lead sponsor: University of California, San Francisco; Other
Eligibility: 65 Years and older
Enrollment: 86 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2014
U.S. locations: 1
States / cities: San Francisco, California

Conditions: Hip Fracture
Interventions: Nutrition, PUSH, PULSE; Dietary Supplement · Behavioral
Lead sponsor: University of Maryland, Baltimore; Other
Eligibility: 60 Years and older
Enrollment: 210 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2017
U.S. locations: 4
States / cities: Farmington, Connecticut • Baltimore, Maryland • Lebanon, New Hampshire + 1 more

Conditions: Protein
Interventions: Conjugated linoleic acid, Vitamin D, Conjugated linoleic acid and Vitamin D, Corn oil (placebo); Dietary Supplement · Other
Lead sponsor: Washington University School of Medicine; Other
Eligibility: 65 Years to 85 Years
Enrollment: 40 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2017 – 2019
U.S. locations: 1
States / cities: St Louis, Missouri

Conditions: Cancer
Interventions: Vitamin D3, Calcium carbonate; Dietary Supplement
Lead sponsor: Creighton University; Other
Eligibility: 55 Years and older · Female only
Enrollment: 2,303 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2015
U.S. locations: 1
States / cities: Fremont, Nebraska

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: 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: Asthma
Interventions: Cholecalciferol; Dietary Supplement
Lead sponsor: University of Pittsburgh; Other
Eligibility: 6 Years to 14 Years
Enrollment: 48 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2015
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Nutrition Status, Bone Health
Interventions: Calcium/Vitamin D, Placebo; Dietary Supplement
Lead sponsor: United States Army Research Institute of Environmental Medicine; Federal
Eligibility: 17 Years and older
Enrollment: 380 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2015 – 2016
U.S. locations: 1
States / cities: Parris Island, South Carolina

Conditions: Bone Density, Bone Health, Fractures
Interventions: Vitamin D3 placebo, Fish oil placebo, Omega-3 fatty acids (fish oil), Vitamin D3; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2026
U.S. locations: 1
States / cities: Boston, Massachusetts

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: Hypercholesterolemia, Vitamin D Deficiency
Interventions: Vitamin D (1000 or 2000 IU/day), Placebo; Dietary Supplement · Other
Lead sponsor: University of California, San Francisco; Other
Eligibility: 18 Years and older
Enrollment: 130 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: San Francisco, California

Conditions: Breast Cancer, Obesity, Hypovitaminosis D
Interventions: Vitamin D, Placebo; Dietary Supplement
Lead sponsor: Fred Hutchinson Cancer Center; Other
Eligibility: 50 Years to 75 Years · Female only
Enrollment: 218 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2012
U.S. locations: 1
States / cities: Seattle, Washington