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ClinicalTrials.gov public records Last synced Nov 15, 2026, 7:21 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

Showing 193–216 of 967 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 . Clear all

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 – 2027
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Weight Loss, Starvation
Interventions: Caloric Restriction, Protein, Exercise, Calcium and Vitamin D, Maltodextrin; Other · Dietary Supplement
Lead sponsor: University of Nebraska Lincoln; Other
Eligibility: 19 Years to 30 Years · Male only
Enrollment: 20 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2019
U.S. locations: 1
States / cities: Lincoln, Nebraska

Conditions: Cerebral Palsy
Interventions: HMB + Vitamin D3; Dietary Supplement
Lead sponsor: Gillette Children's Specialty Healthcare; Other
Eligibility: 13 Years to 17 Years
Enrollment: 7 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2022 – 2024
U.S. locations: 1
States / cities: Saint Paul, Minnesota

Conditions: Diabetes
Interventions: Vitamin D, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo; Dietary Supplement · Drug
Lead sponsor: University of Washington; Other
Eligibility: 50 Years and older
Enrollment: 1,312 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2019
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Psoriasis
Interventions: Calcitriol ointment, Clobetasol spray; Drug
Lead sponsor: Emer, Jason, M.D.; Individual
Eligibility: 18 Years and older
Enrollment: 12 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2010
U.S. locations: 1
States / cities: New York, New York

Conditions: PCOS, Depression, Vitamin D Deficiency, Insulin Resistance
Interventions: Metformin, Vitamin D; Drug
Lead sponsor: University of California, San Francisco; Other
Eligibility: 18 Years to 45 Years · Female only
Enrollment: 5 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2017 – 2019
U.S. locations: 1
States / cities: San Francisco, California

Conditions: Postmenopausal Women
Interventions: 10 vit. D deficient subjects take vit. D for 3 months.; Procedure
Lead sponsor: University of Kansas; Other
Eligibility: 50 Years to 90 Years · Female only
Enrollment: 40 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2004 – 2007
U.S. locations: 1
States / cities: Kansas City, Kansas

Conditions: Diabetes Mellitus, Diabetic Retinopathy
Interventions: EyePromise DVS, EyePromise DVS plus EyePromise EZTears; Dietary Supplement
Lead sponsor: ZeaVision, LLC; Industry
Eligibility: 18 Years to 85 Years
Enrollment: 150 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2022
U.S. locations: 1
States / cities: Charlotte, North Carolina

Conditions: Bariatric Surgery Candidate
Interventions: Zoledronic Acid, Calcium citrate + vitamin D, Vitamin D3; Drug · Dietary Supplement
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 25 Years to 100 Years
Enrollment: 6 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2020
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Schizophrenia, Schizoaffective Disorder
Interventions: Cholecalciferol, Placebo; Drug
Lead sponsor: NYU Langone Health; Other
Eligibility: 18 Years to 65 Years
Healthy volunteers: Healthy volunteers not accepted
Timeline: Started 2015
U.S. locations: 1
States / cities: New York, New York

Conditions: COVID-19, Vitamin D Deficiency, Respiratory Viral Infection
Interventions: Daily Vitamin D3, Daily placebo, Bolus vitamin D3, Bolus placebo; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 50 Years and older
Enrollment: 95 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2020 – 2023
U.S. locations: 1
States / cities: Charleston, South Carolina

Conditions: Breast Cancer, Bone Diseases
Interventions: Vitamin D; Drug
Lead sponsor: Mark Pegram; Other
Eligibility: 18 Years to 85 Years · Female only
Enrollment: 8 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2011
U.S. locations: 1
States / cities: Stanford, California

Conditions: Sarcopenia, Falls
Interventions: vitamin D3, Placebo; Dietary Supplement
Lead sponsor: Tufts University; Other
Eligibility: 65 Years and older · Female only
Enrollment: 24 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2011
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Prostate Cancer
Interventions: risedronate, Placebo risedronate oral tablet; Drug
Lead sponsor: UConn Health; Other
Eligibility: 55 Years to 85 Years · Male only
Enrollment: 50 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2003 – 2009
U.S. locations: 1
States / cities: Farmington, Connecticut

Conditions: Physical Function, Vitamin D Insufficiency
Interventions: calcium, Vitamin D plus calcium; Dietary Supplement
Lead sponsor: Wake Forest University Health Sciences; Other
Eligibility: 70 Years to 89 Years
Enrollment: 16 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: Winston-Salem, North Carolina

Conditions: Breast Neoplasms
Interventions: Exemestane, Calcium carbonate, Vitamin D; Drug · Dietary Supplement
Lead sponsor: Georgetown University; Other
Eligibility: Female only
Enrollment: 46 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2003 – 2011
U.S. locations: 2
States / cities: Washington D.C., District of Columbia • Bethesda, Maryland

Conditions: Osteoporosis, Osteopenia
Interventions: Dried Plum, 800 IU vitamin D and 450mg elemental calcium; Dietary Supplement
Lead sponsor: Florida State University; Other
Eligibility: 50 Years to 80 Years · Male only
Enrollment: 62 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2017 – 2022
U.S. locations: 1
States / cities: Tallahassee, Florida

Conditions: Asthma
Interventions: Vitamin D3, Ciclesonide; Drug
Lead sponsor: Milton S. Hershey Medical Center; Other
Eligibility: 18 Years and older
Enrollment: 408 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2014
U.S. locations: 16
States / cities: San Francisco, California • Denver, Colorado • Atlanta, Georgia + 10 more

Conditions: Osteoporosis
Interventions: rhBMP-2/CPM injection and bisphosphonates, calcium, and vitamin D (oral bisphosphonate therapy), bisphosphonates, calcium, and vitamin D; Drug
Lead sponsor: Pfizer; Industry
Eligibility: 65 Years to 85 Years · Female only
Enrollment: 50 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2015
U.S. locations: 28
States / cities: Phoenix, Arizona • Tucson, Arizona • Sacramento, California + 15 more

Conditions: Parkinson Disease
Interventions: Vitamin D3, Placebo; Dietary Supplement · Other
Lead sponsor: Memorial Medical Center; Other
Eligibility: 18 Years and older
Enrollment: 23 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2013
U.S. locations: 1
States / cities: Johnstown, Pennsylvania

Conditions: Polycystic Ovarian Syndrome in Adolescent Females, Vitamin D Deficiency
Interventions: Vitamin D 4000IU daily, Placebo; Drug
Lead sponsor: Yale University; Other
Eligibility: 13 Years to 21 Years · Female only
Enrollment: 60 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 1
States / cities: New Haven, Connecticut

Conditions: Vitamin D Status
Interventions: Not listed
Lead sponsor: Creighton University; Other
Eligibility: 19 Years to 90 Years
Enrollment: 29 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2008
U.S. locations: 1
States / cities: Omaha, Nebraska

Conditions: Obesity, Rhinitis, Rhinitis, Allergic, Respiratory Sounds, Dyspnea, Headache, Migraine Disorders, Arthritis, Arthralgia, Anxiety, Sleep Initiation and Maintenance Disorders, Sleep Deprivation
Interventions: Vitamin A, Vitamin B6, Vitamin C, Nicotinamide, Vitamin D3, Vitamin E, Broccoli, Spinach, Caffeine, Coffee, Axon Eyewear, Chocolate; Dietary Supplement · Other · Device
Lead sponsor: Verifomics LLC; Industry
Eligibility: 18 Years and older
Enrollment: 16 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016
U.S. locations: 1
States / cities: Dallas, Texas

Conditions: Bone Mineralization Defect
Interventions: Vitamin D2; Drug
Lead sponsor: University of California, Los Angeles; Other
Eligibility: 6 Years to 21 Years
Enrollment: 60 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2014
U.S. locations: 2
States / cities: Loma Linda, California • Los Angeles, California

Search by objective public record fields.

VITAL Rhythm Study

Effect of Caloric Restriction and Protein Intake on Metabolism and Anabolic Sensitivity

HMB Cerebral Palsy Pilot Study

Vitamin D and Omega-3 Trial to Prevent and Treat Diabetic Kidney Disease

Study to Evaluate Vectical in Combination With Clobex Spray to Treatment Plaque Psoriasis

Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial

Vitamin D Deficiency: Bone Loss and Vascular Dysfunction

Combined Effects of Diabetes Self-Management Education and Nutritional Supplementation on Visual Function and Retinopathy

Pilot Study for Zoledronic Acid to Prevent Bone Loss After Bariatric Surgery

Targeted Vitamin D Treatment of Schizophrenia-Associated Hyperprolinemia

Vitamin D Supplementation in the Prevention and Mitigation of COVID-19 Infection

Ph I/II of Vitamin D on Bone Mineral Density & Markers of Bone Resorption

A Pilot Study of the Impact of Vitamin D3 on Muscle Performance in Elderly Women

Effect Of Risedronate On Bone Mass In Older Men Receiving Neoadjuvant Therapy For Prostate Cancer

Vitamin D Supplementation and Physical Function in Older Adults

Exemestane and Celecoxib in Postmenopausal Women at High Risk for Breast Cancer

Dried Plums Prevent Inflammation And Improve Bone Health in Osteopenic Men

Study of the Effect of Vitamin D as an Add-on Therapy to Corticosteroids in Asthma

Study Evaluating Changes In Bone Mineral Density (BMD), And Safety Of Rhbmp-2/CPM In Subjects With Decreased BMD

The Effects of Vitamin D and Bone Loss in Parkinson's Disease

Evaluation of the Clinical and Psychological Impact of Vitamin D Replacement in Adolescent Females at Risk for Polycystic Ovarian Syndrome (PCOS)

Vitamin D Binding Protein (Gc) Allele Variation Effects Response to Vitamin D Treatment

Interventional Testing of Gene-environment Interactions Via the Verifomics Mobile Application

How Bone is Made in Children Receiving Dialysis