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ClinicalTrials.gov public records Last synced Oct 23, 2026, 3:56 AM EDT

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Showing 313–336 of 530 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: phytosterol Clear all
Completed Not applicable Interventional

Vitamin D and Microbiota in Cystic Fibrosis

NCT02589444
View directory record Official record
Conditions
Vitamin D Deficiency, Cystic Fibrosis
Interventions
High-Dose Vitamin D3, Stool Sample, Sputum Sample, Sham Comparator, Blood draw
Dietary Supplement · Other · Procedure
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Oct 23, 2026, 3:56 AM EDT
Not listed Phase 3 Interventional

High Dose Interval Vitamin D Supplementation in Patients With IBD Receiving Remicade

NCT03162432
View directory record Official record
Conditions
IBD, Ulcerative Colitis, Crohn Disease
Interventions
Vitamin D3
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
7 Years to 25 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 10, 2023 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 4 Interventional Results available

Pediatric Study to Evaluate Risk of Developing Essential Fatty Acid Deficiency When Receiving Clinolipid or Standard-of-Care Lipid Emulsion (Part A)

NCT04555044
View directory record Official record
Conditions
Essential Fatty Acid Deficiency (EFAD)
Interventions
Clinolipid, Intralipid
Drug
Lead sponsor
Baxter Healthcare Corporation
Industry
Eligibility
0 Years to 17 Years
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
9
States / cities
Mobile, Alabama • New Haven, Connecticut • Orlando, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 27, 2023 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 2 Interventional Results available

Effect of Alendronate on Bone in People With Chronic Spinal Cord Injury (SCI) Previously Treated With Teriparatide

NCT02195895
View directory record Official record
Conditions
Spinal Cord Injury, Bone Loss, Osteoporosis
Interventions
Alendronate, Calcium, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Northwestern University
Other
Eligibility
21 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 30, 2023 · Synced Oct 23, 2026, 3:56 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Fatty Acids on Infectious Diseases and hCAP18 (VITAL Infection)

NCT01758081
View directory record Official record
Conditions
Infections, Human Cathelicidin Antimicrobial Peptide (hCAP-18)
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,874 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Not applicable Interventional Results available

Cholecalciferol Supplement in Treating Patients With Localized Prostate Cancer Undergoing Observation

NCT00887432
View directory record Official record
Conditions
Prostate Adenocarcinoma
Interventions
Cholecalciferol, Laboratory Biomarker Analysis, Patient Observation, Placebo Administration, Quality-of-Life Assessment, Questionnaire Administration
Dietary Supplement · Other · Drug
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2020
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 26, 2021 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Early Phase 1 Interventional

Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function

NCT02091219
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D, 25(OH)D3
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study of Vitamin D and Uric Acid Lowering on Kidney and Blood Vessel Function

NCT01320722
View directory record Official record
Conditions
Renal Function, Endothelial Function, Blood Pressure, Overweight, Obesity
Interventions
Vitamin D ergocalciferol, Probenecid, Allopurinol, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
242 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 29, 2017 · Synced Oct 23, 2026, 3:56 AM EDT
Withdrawn Phase 1 Interventional

A Pilot Study on the Effect of Vitamin D Treatment in Patients With Statin-Associated Myalgia

NCT01274104
View directory record Official record
Conditions
Hyperlipidemia
Interventions
Vitamin D3, Placebo
Dietary Supplement · Other
Lead sponsor
Avera McKennan Hospital & University Health Center
Other
Eligibility
18 Years to 88 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Apr 22, 2015 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 2 Interventional

Phase II Pre-operative Vitamin D Supplementation to Prevent Post-thyroidectomy Hypocalcemia

NCT01868750
View directory record Official record
Conditions
Thyroid Nodules, Hypocalcemia
Interventions
Calcitriol, Control Pill
Dietary Supplement
Lead sponsor
David Shonka, MD
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 12, 2021 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 3 Interventional

Oral Sodium Fusidate (CEM-102) Versus Oral Linezolid for the Treatment of Acute Bacterial Skin and Skin Structure Infections

NCT02570490
View directory record Official record
Conditions
Acute Bacterial Skin and Skin Structure Infections
Interventions
sodium fusidate, linezolid
Drug
Lead sponsor
Arrevus Inc.
Industry
Eligibility
12 Years and older
Enrollment
716 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
60
States / cities
Anaheim, California • Bakersfield, California • Buena Park, California + 46 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2019 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 1 Interventional

Trial of Combination Therapy to Treat COVID-19 Infection

NCT04482686
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 4 Interventional Results available

Paricalcitol Versus Calcitriol for Efficacy and Safety in Stage 3/4 Chronic Kidney Disease (CKD) With Secondary Hyperparathyroidism (SHPT)

NCT00823303
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Paricalcitol, Calcitriol
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
4
States / cities
Chicago, Illinois • Evanston, Illinois • Detroit, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2014 · Synced Oct 23, 2026, 3:56 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D Supplements on Mental Health and Milk Composition in Mothers Living in Idaho

NCT06919718
View directory record Official record
Conditions
Maternal Stress
Interventions
Vitamin D (Cholecalciferol ), Placebo
Dietary Supplement · Other
Lead sponsor
University of Idaho
Other
Eligibility
18 Years to 64 Years · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
2
States / cities
Coeur d'Alene, Idaho • Moscow, Idaho
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 2 Interventional

Calcitriol and Dexamethasone in Patients With Myelodysplastic Syndromes

NCT00030069
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jan 15, 2016 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 3 Interventional Results available

Evolocumab Compared to LDL-C Apheresis in Patients Receiving LDL-C Apheresis Prior to Study Enrollment

NCT02585895
View directory record Official record
Conditions
Hypercholesterolemia
Interventions
Evolocumab, Low-density Lipoprotein Cholesterol (LDL-C) Apheresis
Biological · Procedure
Lead sponsor
Amgen
Industry
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
4
States / cities
Boca Raton, Florida • Kansas City, Kansas • Grandville, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 30, 2022 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Insufficiency in Man

NCT01848236
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D2, Vitamin D3
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Oct 23, 2026, 3:56 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Study of Parental Ratings of Quality of Life and Body Composition in 5-19 Year Olds While Participating in the Good NEWS 4 Kids Program

NCT01855009
View directory record Official record
Conditions
Quality of Life, Body Mass Index
Interventions
MannaBears, AlgaeCal Calcium, Calcium carbonate, Vitamin D3
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
5 Years to 19 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 24, 2013 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency

NCT01651000
View directory record Official record
Conditions
Chronic Kidney Disease, Hyperparathyroidism, Secondary, Vitamin D Deficiency
Interventions
CTAP101 30 μg capsules, Sugar pill to CTAP101 30 μg capsules
Drug · Other
Lead sponsor
OPKO IP Holdings II, Inc.
Industry
Eligibility
18 Years and older
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Bannockburn, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Glomerular Disease

NCT01835639
View directory record Official record
Conditions
Glomerular Disease
Interventions
Cholecalciferol, 2000 or 4000 IUs by mouth daily for 12 weeks
Dietary Supplement
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
5 Years to 30 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
5
States / cities
Wilmington, Delaware • Baltimore, Maryland • New Hyde Park, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2019 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy of Vitamin D Therapy on Glucose Homeostasis in Obese Adolescents

NCT02414529
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D2, Placebo
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
12 Years to 18 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 17, 2017 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 1 Interventional Results available

Vitamin D and Severe Asthma Exacerbations

NCT01921894
View directory record Official record
Conditions
Asthma
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
6 Years to 14 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 23, 2017 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Sulfates in Breastmilk

NCT06203041
View directory record Official record
Conditions
Vitamin D Deficiency, Breast Milk Collection
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
1 Month to 60 Years
Enrollment
101 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Oct 23, 2026, 3:56 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Vitamin D in OUD: Exploration of Alterations on the Dopamine D2/D3 Receptor System

NCT06261905
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
[11C]-PHNO, Calcitriol, Placebo Control, PET Scan
Drug · Dietary Supplement · Other + 1 more
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 14, 2025 · Synced Oct 23, 2026, 3:56 AM EDT