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Showing 1–21 of 21 matching trials from the live ClinicalTrials.gov search.

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Filters: Condition: Vitamin A Status Clear all

Conditions: Breast Neoplasms
Interventions: Vitamin D, Calcium carbonate, Vitamin D, Placebo; Dietary Supplement · Drug · Other
Lead sponsor: Washington University School of Medicine; Other
Eligibility: 18 Years and older · Female only
Enrollment: 63 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2005 – 2009
U.S. locations: 1
States / cities: St Louis, Missouri

Conditions: Parkinson's Disease
Interventions: Vitamin B12 Supplementation; Dietary Supplement
Lead sponsor: Emory University; Other
Eligibility: 21 Years and older
Enrollment: 57 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2010
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Hemophilia A, Hemophilia B, Vitamin D Deficiency
Interventions: Vitamin D and calcium; Dietary Supplement
Lead sponsor: Virginia Commonwealth University; Other
Eligibility: 2 Years to 21 Years · Male only
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2015
U.S. locations: 1
States / cities: Richmond, Virginia

Conditions: Sickle Cell Anemia in Children, Vitamin A Deficiency in Children
Interventions: retinyl palmitate; Dietary Supplement
Lead sponsor: Children's Hospital of Philadelphia; Other
Eligibility: 9 Years and older
Enrollment: 42 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2015 – 2016
U.S. locations: 1
States / cities: Philadelphia, Pennsylvania

Conditions: Cystic Fibrosis
Interventions: ergocalciferol (vitamin D2), Sperti Del Sol Lamp, Vitamin D3; Drug · Device
Lead sponsor: Atlanta VA Medical Center; Federal
Eligibility: 18 Years to 60 Years
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2011
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Nutritional Status, Serum Biomarkers
Interventions: Dietary Supplement (Kids Multi & Omegas); Dietary Supplement
Lead sponsor: SF Research Institute, Inc.; Network
Eligibility: 4 Years to 15 Years
Enrollment: 30 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2026
U.S. locations: 1
States / cities: San Francisco, California

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: Sepsis, Severe Sepsis, End Organ Damage, Multi Organ Failure
Interventions: vitamin D3, Placebo; Drug
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 18 Years to 80 Years
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2022
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: New Biomarkers for Measuring Vitamin D Level
Interventions: Vitamin D Supplementation, Placebo, Calcium; Dietary Supplement · Other
Lead sponsor: NYU Langone Health; Other
Eligibility: 60 Years to 90 Years · Female only
Enrollment: 444 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2019
U.S. locations: 1
States / cities: Mineola, New York

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: Vitamin D Deficiency
Interventions: 250,000 IU cholecalciferol as single, oral dose, Placebo; Dietary Supplement
Lead sponsor: Emory University; Other
Eligibility: 18 Years to 65 Years
Enrollment: 28 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2017
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Cognitive Decline, Cognitive Impairment
Interventions: Vitamin D; Other
Lead sponsor: National Institute on Aging (NIA); NIH
Eligibility: 30 Years to 64 Years
Enrollment: 3,720 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2004 – 2013
U.S. locations: 1
States / cities: Baltimore, Maryland

Conditions: Determine Effect of Vitamin D on Bone Health in Elderly African American Women
Interventions: Vitamin D 3, placebo; Dietary Supplement · Other
Lead sponsor: Winthrop University Hospital; Other
Eligibility: 60 Years and older · Female only
Enrollment: 260 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2016
U.S. locations: 1
States / cities: Mineola, New York

Conditions: Vitamin A Deficiency
Interventions: dietary carotenoids, spinach, rice, and synthetic beta-carotene; Dietary Supplement
Lead sponsor: Tufts University; Other
Eligibility: 6 Years to 8 Years
Enrollment: 72 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2009
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin D Deficiency
Interventions: 7 continuous days of aerobic training; Other
Lead sponsor: David Travis Thomas; Other
Eligibility: 65 Years to 75 Years
Enrollment: 7 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2015
U.S. locations: 1
States / cities: Lexington, Kentucky

Conditions: Healthy
Interventions: Vitamin D, Placebo; Dietary Supplement
Lead sponsor: University of Kentucky; Other
Eligibility: 18 Years and older
Enrollment: 45 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2012
U.S. locations: 1
States / cities: Lexington, Kentucky

Conditions: Obesity
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Mayo Clinic; Other
Eligibility: 12 Years to 18 Years
Enrollment: 51 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2012
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Vitamin A Status
Interventions: b-carotene, retinyl palmitate, placebo; Dietary Supplement
Lead sponsor: University of California, Davis; Other
Eligibility: 18 Years to 35 Years · Female only
Enrollment: 85 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013
U.S. locations: 1
States / cities: Davis, California

Conditions: Vitamin D Deficiency, Accidental Falls
Interventions: Vitamin D3, Vitamin E; Dietary Supplement
Lead sponsor: Wake Forest University Health Sciences; Other
Eligibility: 65 Years and older
Enrollment: 68 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: Winston-Salem, North Carolina

Conditions: Bone Health, Nutrition Status
Interventions: Ca/Vit D, Placebo; Dietary Supplement · Other
Lead sponsor: United States Army Research Institute of Environmental Medicine; Federal
Eligibility: 17 Years to 42 Years
Enrollment: 342 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2018
U.S. locations: 2
States / cities: Fort Sill, Oklahoma • San Antonio, Texas

Conditions: Vitamin A, Vitamin A Deficiency, Leukoplakia, Vocal Cord Neoplasm
Interventions: Not listed
Lead sponsor: University of Wisconsin, Madison; Other
Eligibility: 18 Years and older
Enrollment: 50 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2022 – 2026
U.S. locations: 1
States / cities: Madison, Wisconsin