Search | Clinical Trials Finder

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ClinicalTrials.gov public records Last synced Nov 15, 2026, 8:23 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 337–360 of 967 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 . Clear all

Conditions: Gastric Bypass, Parathyroid Hormone
Interventions: Paricalcitol, Cholecalciferol, Placebo; Drug
Lead sponsor: Kerstyn C. Zalesin, M.D.; Other
Eligibility: 18 Years to 100 Years
Enrollment: 49 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2015
U.S. locations: 1
States / cities: Royal Oak, Michigan

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: Adult Solid Neoplasm
Interventions: Calcitriol, Cisplatin, Gemcitabine Hydrochloride, Pharmacological Study; Dietary Supplement · Drug · Other
Lead sponsor: Roswell Park Cancer Institute; Other
Eligibility: 18 Years and older
Enrollment: 14 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2015
U.S. locations: 2
States / cities: Buffalo, New York • Charlottesville, Virginia

Conditions: Sickle Cell Disease, Anemia, Sickle Cell, Anemia, Hemolytic, Congenital, Respiratory Tract Diseases, Respiration Disorders, Acute Chest Syndrome, Lung Diseases, Asthma, Respiratory Tract Infections, Nutrition Disorders, Deficiency Diseases Vitamin, Vitamin D Deficiency
Interventions: Daily oral vitamin D3, 3,333 IU, Monthly oral vitamin D3, 100,000 IU, Placebo oral tablet; Drug
Lead sponsor: Columbia University; Other
Eligibility: 3 Years to 20 Years
Enrollment: 58 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2024
U.S. locations: 1
States / cities: New York, New York

Conditions: Vitamin D Deficiency, Obesity, Type 2 Diabetes Mellitus, Intestinal Permeability
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Fred Hutchinson Cancer Center; Other
Eligibility: 18 Years to 65 Years
Enrollment: 18 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2013
U.S. locations: 1
States / cities: Seattle, Washington

Conditions: Post-Acute COVID-19 Syndrome, Fatigue
Interventions: Dietary intervention to mitigate Post-Acute COVID-19 Syndrome, Attention Control; Other
Lead sponsor: University of Maryland, Baltimore; Other
Eligibility: 50 Years to 94 Years
Enrollment: 56 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2028
U.S. locations: 1
States / cities: Baltimore, Maryland

Conditions: Asthma
Interventions: vitamin D3 4000 IU, Placebo; Drug
Lead sponsor: Juan Celedon, MD; Other
Eligibility: 6 Years to 16 Years
Enrollment: 192 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2019
U.S. locations: 7
States / cities: San Francisco, California • Denver, Colorado • Boston, Massachusetts + 4 more

Conditions: Weight Loss, Starvation
Interventions: Caloric Restriction, Post-Exercise Protein, Energy Balance, Post-Exercise Carbohydrate, Calcium and Vitamin D; Other · Dietary Supplement
Lead sponsor: University of Nebraska Lincoln; Other
Eligibility: 19 Years to 30 Years
Enrollment: 17 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2019
U.S. locations: 1
States / cities: Lincoln, Nebraska

Conditions: Vitamin D Deficiency, Nutritional Deficiency
Interventions: High dose Cholecalciferol, Cholecalciferol; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 0 Days to 45 Years
Enrollment: 8 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2022
U.S. locations: 1
States / cities: Charleston, South Carolina

Conditions: Chronic Kidney Disease (CKD), Secondary Hyperparathyroidism
Interventions: PLS240, Standard of Care; Drug · Combination Product
Lead sponsor: Pathalys Pharma; Industry
Eligibility: 1 Month to 17 Years
Enrollment: 56 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2032
U.S. locations: 1
States / cities: Buffalo, New York

Conditions: Cirrhosis, Hepatocellular Carcinoma
Interventions: Vitamin D; Drug
Lead sponsor: Johns Hopkins University; Other
Eligibility: 18 Years to 75 Years
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2016
U.S. locations: 1
States / cities: Washington D.C., District of Columbia

Conditions: Cystic Fibrosis
Interventions: Vitamin D3, Placebo; Dietary Supplement
Lead sponsor: Emory University; Other
Eligibility: 18 Years to 70 Years
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2010
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Mild Cognitive Impairment
Interventions: BBH-1001 Brain Health Supplement, Lifestyle Intervention, Brain Health Placebo; Dietary Supplement · Other
Lead sponsor: Cedars-Sinai Medical Center; Other
Eligibility: 55 Years and older
Enrollment: 150 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2019
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Myelodysplastic Syndromes
Interventions: Calcitriol, Dexamethasone; Drug
Lead sponsor: University of Pittsburgh; Other
Eligibility: Not listed
Enrollment: 32 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2001 – 2009
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Healthy
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: University of Georgia; Other
Eligibility: 9 Years to 13 Years
Enrollment: 323 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2011
U.S. locations: 3
States / cities: Athens, Georgia • Indianapolis, Indiana • West Lafayette, Indiana

Conditions: Osteoporosis
Interventions: Actonel; Drug
Lead sponsor: Sanofi; Industry
Eligibility: 30 Years to 85 Years
Enrollment: 248 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2002 – 2004
U.S. locations: 1
States / cities: Bridgewater, New Jersey

Conditions: Atherosclerosis, Systemic Lupus Erythematosus
Interventions: Cholecalciferol; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 18 Years to 80 Years
Enrollment: 9 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2014
U.S. locations: 1
States / cities: Charleston, South Carolina

Conditions: Colorectal Cancer
Interventions: Vitamin D intervention, Placebo intervention; Dietary Supplement
Lead sponsor: Baylor University; Other
Eligibility: 18 Years to 79 Years
Enrollment: 43 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2022 – 2023
U.S. locations: 1
States / cities: Waco, Texas

Conditions: Lipid Metabolism Disorders
Interventions: High fat liquid shake; Dietary Supplement
Lead sponsor: National Heart, Lung, and Blood Institute (NHLBI); NIH
Eligibility: 18 Years to 65 Years
Enrollment: 48 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2029
U.S. locations: 1
States / cities: Bethesda, Maryland

Conditions: Vitamin D Deficiency
Interventions: Redoxon VI, placebo; Dietary Supplement
Lead sponsor: Oregon State University; Other
Eligibility: 55 Years to 75 Years
Enrollment: 42 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2019
U.S. locations: 1
States / cities: Corvallis, Oregon

Conditions: Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions: Etelcalcetide, Standard of Care; Drug · Other
Lead sponsor: Amgen; Industry
Eligibility: 0 Years to 18 Years
Enrollment: 56 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2029
U.S. locations: 10
States / cities: Los Angeles, California • Aurora, Colorado • Kansas City, Missouri + 7 more

Conditions: Diabetes, Diabetic Retinopathy
Interventions: DVS supplementation; Dietary Supplement
Lead sponsor: ZeaVision, LLC; Industry
Eligibility: 21 Years to 80 Years
Enrollment: 45 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2022
U.S. locations: 2
States / cities: Pomona, California • Tahlequah, Oklahoma

Conditions: Prostate Cancer
Interventions: calcifidiol; Drug
Lead sponsor: US Department of Veterans Affairs; Federal
Eligibility: Male only
Healthy volunteers: Healthy volunteers not accepted
Timeline: 1999 – 2002
U.S. locations: 1
States / cities: Miami, Florida

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

Search by objective public record fields.

Trial Of Paricalcitol and Cholecalciferol(Vitamin D3) in the Treatment Of Secondary Hyperparathyroidism in Patients After ROUX-EN-Y Gastric Bypass Surgery

Vitamin D Supplements for HIV-positive Patients on cART

Calcitriol, Cisplatin, and Gemcitabine Hydrochloride in Treating Patients With Advanced Solid Tumors That Cannot Be Removed by Surgery

Daily Vitamin D for Sickle-cell Respiratory Complications

Vitamin D and Adipose Tissue Inflammation

Dietary Intervention to Mitigate Post-Acute COVID-19 Syndrome

Vitamin D to Prevent Severe Asthma Exacerbations (Vit-D-Kids Asthma)

Resistance Exercise and Protein During Weight Loss

Mothers' Own Milk Optimization for Preterm Infants Project (MoMO PIP) Pilot Study

A Study of PLS240 in Pediatric Participants With Secondary Hyperparathyroidism and Chronic Kidney Disease on Hemodialysis

Study of High-Dose Oral Vitamin D for the Prevention of Liver Cancer

Effects of Vitamin D Supplementation on Lung Function in an Acute Pulmonary Exacerbation of Cystic Fibrosis

Lifestyle Intervention Program for Cognitive Impairment

Calcitriol and Dexamethasone in Patients With Myelodysplastic Syndromes

Vitamin D Needs of Early Adolescent Children

Impact of Vertebral Fracture Knowledge on Persistence in Subjects Taking Glucocorticoid Therapy

Vitamin D to Improve Endothelial Function in SLE

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

Plasma Lipids-Dependent Vitamin E Metabolism During Dynamic Hyperlipidemia

The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults

A Trial of Etelcalcetide in Pediatric Participants With Secondary Hyperparathyroidism and Chronic Kidney Disease on Hemodialysis

Diabetic Retinopathy Functional Evaluation Study: Monitoring Carotenoid Vitamins Treatment Using ERG

Calcifidol Therapy in Men With Cancer

Evaluation of Calcium and Vitamin D Supplementation During Marine Corps Training