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ClinicalTrials.gov public records Last synced Nov 15, 2026, 10:11 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 433–456 of 967 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 . Clear all

Conditions: Falling Injury, Nutrition Disorder
Interventions: Data Collection prior to first fall for all fallers, Hgb value, Vitamin D, C-Reactive Protein; Other
Lead sponsor: Louis Stokes VA Medical Center; Federal
Eligibility: 18 Years and older
Enrollment: 485 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2018
U.S. locations: 1
States / cities: Cleveland, Ohio

Conditions: Obesity
Interventions: Drisdol (Ergocalciferol) Vitamin D2, Placebo; Drug
Lead sponsor: Stanford University; Other
Eligibility: 11 Years to 17 Years
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2012
U.S. locations: 1
States / cities: Stanford, California

Conditions: Healthy, Adult, Calcium, Bone Resorption, Endocrine; Obesity
Interventions: Calcium carbonate, Placebo Control; Dietary Supplement
Lead sponsor: University of Georgia; Other
Eligibility: 18 Years to 45 Years
Enrollment: 14 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2023 – 2024
U.S. locations: 1
States / cities: Athens, Georgia

Conditions: Elevated Blood Pressure, Endothelial Dysfunction
Interventions: 2,000 International Units (IU)of vitamin D3; Dietary Supplement
Lead sponsor: Texas Woman's University; Other
Eligibility: 18 Years and older · Female only
Enrollment: 27 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2015 – 2016
U.S. locations: 1
States / cities: Houston, Texas

Conditions: Hip Fracture
Interventions: PUSH, Protein, Nutrition; Behavioral · Dietary Supplement
Lead sponsor: University of Maryland, Baltimore; Other
Eligibility: 60 Years and older
Enrollment: 20 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2020
U.S. locations: 2
States / cities: Baltimore, Maryland • Towson, Maryland

Conditions: Post Menopausal Osteoporosis
Interventions: Ibandronate [Bonviva/Boniva], Calcium, Vitamin D; Drug · Dietary Supplement
Lead sponsor: Hoffmann-La Roche; Industry
Eligibility: 55 Years to 80 Years · Female only
Enrollment: 1,609 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2002 – 2004
U.S. locations: 20
States / cities: Irvine, California • Loma Linda, California • Los Angeles, California + 17 more

Conditions: Adenomatous Polyps
Interventions: 0.5 mg calcitriol (1a -25-dihydroxycholecalciferol), 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3), placebo to 0.5 mg calcitriol (1a -25-dihydroxycholecalciferol), placebo to 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3), Colonoscopy; Drug · Procedure
Lead sponsor: Colotech A/S; Industry
Eligibility: 40 Years to 75 Years
Enrollment: 350 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2007 – 2010
U.S. locations: 24
States / cities: Huntsville, Alabama • San Diego, California • Clearwater, Florida + 20 more

Conditions: Cancer
Interventions: 1,25 (OH)2 D3, Inspiratory isometric resistance training, Oral Placebo, Sham Inspiratory Isometric Resistance Training, Threshold Inspiratory Muscle Trainer (IMT); Drug · Other · Device
Lead sponsor: Mayo Clinic; Other
Eligibility: 18 Years and older
Enrollment: 63 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2020
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Psoriasis
Interventions: CD 2027, Calcitriol Vehicle; Drug
Lead sponsor: Galderma R&D; Industry
Eligibility: 18 Years and older
Enrollment: 88 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2009
U.S. locations: 2
States / cities: Fridley, Minnesota • Nashville, Tennessee

Conditions: Polycystic Ovary Syndrome, Hormone Imbalance
Interventions: Optify Myo Inositol and D-Chiro Inositol Plus Folate and Vitamin D supplement; Dietary Supplement
Lead sponsor: Optify; Other
Eligibility: 18 Years to 55 Years · Female only
Enrollment: 40 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2023 – 2024
U.S. locations: 1
States / cities: Santa Monica, California

Conditions: Family Member
Interventions: Bio-D-Mulsion Forte®, Placebo; Dietary Supplement · Other
Lead sponsor: University of Miami; Other
Eligibility: 55 Years and older
Enrollment: 101 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2014 – 2015
U.S. locations: 1
States / cities: Miami, Florida

Conditions: Multiple Myeloma, Peripheral Neuropathy
Interventions: Not listed
Lead sponsor: Oncotherapeutics; Industry
Eligibility: 18 Years and older
Enrollment: 110 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2015
U.S. locations: 3
States / cities: Highland, California • West Hollywood, California • Hinsdale, Illinois

Conditions: Respiratory Failure
Interventions: Enteral Vitamin D3 50,000 IU, Enteral Vitamin D3 100,000IU, Inactive substance; Drug · Other
Lead sponsor: Emory University; Other
Eligibility: 18 Years and older
Enrollment: 31 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2014
U.S. locations: 2
States / cities: Atlanta, Georgia

Conditions: Secondary Hyperparathyroidism, Hypocalcemia
Interventions: Calcitriol; Drug
Lead sponsor: Roxane Laboratories; Industry
Eligibility: 18 Years to 45 Years
Enrollment: 36 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2003
U.S. locations: 1
States / cities: Springfield, Missouri

Conditions: COVID, Covid-19, Corona Virus Infection, Coronavirus Infection, Coronavirus-19, SARS-CoV2, SARS-CoV Infection
Interventions: Ivermectin, Doxycycline Hcl, Zinc, Vitamin D3, Vitamin C; Drug · Dietary Supplement
Lead sponsor: ProgenaBiome; Other
Eligibility: 18 Years and older
Enrollment: 31 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2022
U.S. locations: 1
States / cities: Ventura, California

Conditions: Vitamin D Deficiency, Fat Malabsorption
Interventions: Calcifediol, Calciferol; Drug
Lead sponsor: Boston University; Other
Eligibility: 18 Years and older
Enrollment: 16 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2019
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Chronic Kidney Disease, Vitamin D Deficiency
Interventions: Cholecalciferol, Placebo; Drug
Lead sponsor: Atlanta VA Medical Center; Federal
Eligibility: 18 Years to 85 Years
Enrollment: 34 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2005 – 2013
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Vitamin D Deficiency
Interventions: Prenatal Vitamin, Cholecalciferol (Vitamin D3); Drug
Lead sponsor: Children's Hospital Medical Center, Cincinnati; Other
Eligibility: 18 Years to 45 Years · Female only
Enrollment: 192 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: Cincinnati, Ohio

Conditions: Covid19, Corona Virus Infection, Autoimmune Diseases, Coagulation Disorder, Blood
Interventions: Narrow Band ultraviolet B-Band Light, non Narrow Band ultraviolet B-Band Light; Device
Lead sponsor: Cytokind, Inc.; Industry
Eligibility: 50 Years to 110 Years
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021
U.S. locations: 1
States / cities: New Orleans, Louisiana

Conditions: Obesity, Vitamin D Deficiency, Psychosis, Schizophrenia, Schizoaffective Disorder
Interventions: Ergocalciferols; Drug
Lead sponsor: University of Massachusetts, Worcester; Other
Eligibility: 10 Years to 18 Years
Enrollment: 12 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2010
U.S. locations: 1
States / cities: Worcester, Massachusetts

Conditions: Infant Mortality, Preterm Birth, Low Birth Weight, Neonatal Mortality, Perinatal Mortality
Interventions: Iron (27 mg) - folic acid (600 ug), Multiple micronutrient; Dietary Supplement
Lead sponsor: Johns Hopkins Bloomberg School of Public Health; Other
Eligibility: 12 Years to 45 Years · Female only
Enrollment: 44,567 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: Baltimore, Maryland

Conditions: Vitamin D Deficiency, Cognitive Decline
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: University of California, Davis; Other
Eligibility: 65 Years to 90 Years
Enrollment: 180 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2026
U.S. locations: 1
States / cities: Walnut Creek, California

Conditions: Healthy
Interventions: Vitamin D3 1000 IU, Placebo Tablet; Dietary Supplement
Lead sponsor: University of Pittsburgh; Other
Eligibility: 8 Years to 14 Years
Enrollment: 157 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2011
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Unspecified Adult Solid Tumor, Protocol Specific
Interventions: vitamin D3 analogue ILX23-7553; Dietary Supplement
Lead sponsor: Memorial Sloan Kettering Cancer Center; Other
Eligibility: 18 Years and older
Healthy volunteers: Healthy volunteers not accepted
Timeline: 1999 – 2009
U.S. locations: 2
States / cities: Newark, New Jersey • New York, New York

Search by objective public record fields.

Malnutrition's Role in Fall Risk

Effect of Vitamin D Supplementation on Inflammation and Cardiometabolic Risk Factors in Obese Adolescents

Understanding Effects of Calcium on the Gut-Bone Axis

Effectiveness of Vitamin D Supplementation

PUSH Plus Protein Pilot for Hip Fracture Patients

MOBILE Study - A Study of Bonviva (Ibandronate) Regimens in Women With Post-Menopausal Osteoporosis

Chemoprevention of Colorectal Adenomas

Maintain Respiratory Muscle Function and Reduce Pneumonia Risk in Cancer Patients

Efficacy and Safety Study of CD 2027 Spray in Subjects With Plaque-type Psoriasis

A Single Group Study to Evaluate the Effects of a Myo-Inositol and D-Chiro Inositol Supplement on Symptoms Associated With Polycystic Ovary Syndrome and Hormone Imbalance

Vitamin D's Effect on Physical Performance in the Elderly

Serum Vitamin D Levels and Peripheral Neuropathy Among Multiple Myeloma Patients

Vitamin D in Ventilated ICU Patients

Bioequivalency Study of Calcitriol Tablets Under Fasting Conditions

Trial of Combination Therapy to Treat COVID-19 Infection

25-Hydroxyvitamin D Pharmacokinetic Study

Cholecalciferol (Vitamin D3) Therapy in Chronic Kidney Disease (CKD) Subjects

Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants

Photo-Protection Trial (NB-UVB vs. Placebo) in High-risk Hospitalized COVID-19 Patients

Vitamin D Supplementation in Psychiatric Illnesses

Antenatal Micronutrient Supplementation and Infant Survival

High-dose Vitamin D Supplements in Older Adults

Defining Vitamin D Insufficiency in School Age Children: A Randomized Placebo Controlled Trial of Vitamin D3

ILX23-7553 in Treating Patients With Solid Tumors That Have Not Responded to Previous Therapy