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ClinicalTrials.gov public records Last synced Oct 22, 2026, 8:02 AM EDT

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Showing 97–120 of 530 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: phytosterol Clear all
Completed Phase 2 Interventional Results available

Vitamin D as a Modifier of Serum Hepcidin in Children With Chronic Kidney Disease

NCT01532349
View directory record Official record
Conditions
Anemia of Chronic Kidney Disease
Interventions
Cholecalciferol
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
1 Year to 21 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 4 Interventional Results available

Repeated-dose Safety, Efficacy, Pharmacokinetic and Pharmacodynamic of CTAP101, Immediate-release Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With Secondary Hyperparathyroidism, Chronic Kidney Disease 3-4 and Vitamin D Insufficiency

NCT03588884
View directory record Official record
Conditions
Secondary Hyperparathyroidism Due to Renal Causes, Vitamin D Insufficiency, CKD Stage 3, CKD Stage 4
Interventions
Calcifediol Oral Capsule, Calcifediol Oral Product, Cholecalciferol, Paricalcitol Oral Capsule
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
3
States / cities
Garden Grove, California • Chicago, Illinois • West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 9, 2022 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Older Adults With Urinary Incontinence

NCT01971801
View directory record Official record
Conditions
Urinary Incontinence, Vitamin D Deficiency
Interventions
Vitamin D3 50,000 IU, Placebo
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
50 Years and older · Female only
Enrollment
243 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 9, 2018 · Synced Oct 22, 2026, 8:02 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Vitamin D and Blood Pressure

NCT00459563
View directory record Official record
Conditions
Hypertension
Interventions
Vitamin D, calcitriol, Placebo
Drug
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
18 Years to 80 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 8, 2014 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 4 Interventional

Study of Vitamin D in the Severely Mentally Ill

NCT01169142
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Bronx Psychiatric Center
Government
Eligibility
19 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 19, 2018 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Pilot Study: The Effect of Ergocalciferol on Plasma Mucin-1 Levels

NCT03747523
View directory record Official record
Conditions
Ergocalciferol
Interventions
Ergocalciferol
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 29, 2020 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional Results available

Feasibility and Effectiveness of Micronutrients as Palliative Care Therapy in Patients With Congestive Heart Failure

NCT01474486
View directory record Official record
Conditions
Congestive Heart Failure, Ischemic Cardiomyopathy
Interventions
Micronutrients
Drug
Lead sponsor
Phoenix VA Health Care System
Federal
Eligibility
18 Years to 89 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 2 Interventional Results available

Safety, Feasibility and Efficacy of Vitamin D Supplementation in Women With Metastatic Breast Cancer (SAFE-D)

NCT02186015
View directory record Official record
Conditions
Adult Women, Metastatic Breast Cancer, Estrogen Receptor Positive
Interventions
Cholecalciferol
Drug
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older · Female only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated May 14, 2021 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Vitamin D, Glucose Control and Insulin Sensitivity in African-Americans

NCT00784511
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
cholecalciferol, microcrystalline cellulose
Dietary Supplement · Other
Lead sponsor
Tufts University
Other
Eligibility
40 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 14, 2014 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Human Lung Responses to Respiratory Pathogens

NCT01967628
View directory record Official record
Conditions
Respiratory Infection
Interventions
Vitamin D3 (cholecalciferol), Placebo Sugar Pill
Dietary Supplement
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 60 Years
Enrollment
98 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 1 Interventional

Ergocalciferol Therapy in Calcidiol Deficient, Hemodialysis Patients on Therapeutic Doses of Paricalcitol

NCT02011828
View directory record Official record
Conditions
Inflammation, Insulin Resistance
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Aug 11, 2016 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional

The Effect of Vitamin D Supplementation on Glucose Metabolism in Non-Diabetic African American Adults

NCT01141192
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
vitamin D3, cholecalciferol, Inactive comparator
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
19 Years to 60 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 10, 2010 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Status and Dose Response in Infants

NCT01042561
View directory record Official record
Conditions
Vitamin D, Prematurity
Interventions
Vitamin D3, vitamin D3 placebo
Dietary Supplement
Lead sponsor
University of Nebraska
Other
Eligibility
5 Minutes to 3 Months
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 1, 2023 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional

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

NCT00788138
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Oct 11, 2010 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

The Effect of Vitamin D Supplementation on Muscle Power in Elite Cyclist

NCT01518725
View directory record Official record
Conditions
Muscle Power
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Oklahoma State University
Other
Eligibility
18 Years to 35 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 29, 2015 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Is Treatment of Vitamin D Deficiency Associated With Resolution of Statin-Induced Muscular Symptoms

NCT01568255
View directory record Official record
Conditions
Myopathic Symptoms
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Oct 22, 2026, 8:02 AM EDT
Not listed Phase 4 Interventional

How Bone is Made in Children Receiving Dialysis

NCT01799317
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Feb 26, 2013 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional Results available

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

NCT01217840
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Nov 29, 2017 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

VITAL-DEP: Depression Endpoint Prevention in the VITamin D and OmegA-3 TriaL

NCT01696435
View directory record Official record
Conditions
Depression, Depressive Symptoms, Mood
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
18,353 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 4 Interventional

Vitamin D Deficiency in Adults Following a Major Burn Injury

NCT05084248
View directory record Official record
Conditions
Vitamin D Deficiency, Burns
Interventions
Ergocalciferol Capsules
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D and Prostate Cancer: A Clinical Study Enrolling Subjects Undergoing Prostatectomy

NCT02726113
View directory record Official record
Conditions
Prostate Cancer
Interventions
cholecalciferol, placebo
Drug · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
19 Years to 90 Years · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 3, 2019 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3

NCT04885803
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Softgel Vitamin D3, Nano Liquid Vitamin D3, 25(OH)D Blood Serum Test, Placebo Control
Dietary Supplement · Diagnostic Test · Other
Lead sponsor
Inspired Life Medical, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Le Sueur, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Not applicable Interventional

DNA Changes That Affect Vitamin D Metabolism in Patients With Colorectal Cancer Receiving Vitamin D Supplements

NCT00550563
View directory record Official record
Conditions
Colorectal Cancer
Interventions
cholecalciferol, polymerase chain reaction, polymorphism analysis, protein expression analysis, reverse transcriptase-polymerase chain reaction, western blotting, high performance liquid chromatography, laboratory biomarker analysis, pharmacological study, adjuvant therapy, immunoscintigraphy
Dietary Supplement · Genetic · Other + 1 more
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 120 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Oct 22, 2026, 8:02 AM EDT
Completed Phase 2 Interventional Results available

Short-term Behavioral Effects of Cholesterol Therapy in Smith-Lemli-Opitz Syndrome

NCT00114634
View directory record Official record
Conditions
Smith-Lemli-Opitz Syndrome
Interventions
Egg yolk preparation with cholesterol, Egg substitute, without cholesterol
Dietary Supplement
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
4 Years to 17 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 29, 2016 · Synced Oct 22, 2026, 8:02 AM EDT