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ClinicalTrials.gov public records Last synced Oct 6, 2026, 10:55 AM EDT

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Showing 145–168 of 181 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Supplemental Vitamin D Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile

NCT01688102
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Oral Vitamin D3, Ultraviolet Light
Dietary Supplement · Radiation
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 70 Years
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 6, 2017 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D Status on Bones in Breastfed Infants

NCT00697294
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Tri-Vi-Sol
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 2 Hours
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
3
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 5, 2011 · Synced Oct 6, 2026, 10:55 AM EDT
Terminated Not applicable Interventional

The Pittsburgh Vitamin D Study: Vitamin D Supplementation in Vitamin D-deficient Subjects at Risk of Lung Cancer

NCT02532062
View directory record Official record
Conditions
Deficiency of Vitamin D3, COPD
Interventions
Cholecalciferol, multivitamin, Placebo
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
50 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 26, 2018 · Synced Oct 6, 2026, 10:55 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Calcium-Rich Food Versus Calcium Carbonate for Bone Health

NCT07763509
View directory record Official record
Conditions
Osteopenia, Osteoporosis, Bone Health in Perimenopausal Women, Menopause Related Conditions, Fracture Healing
Interventions
500 mg calcium from milk-derived minerals, Calcium Carbonate 500 MG
Other · Dietary Supplement
Lead sponsor
Cornell University
Other
Eligibility
40 Years to 90 Years · Female only
Enrollment
217 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluate Effects of Sprinkled Format REDUCOSE in a Carbohydrate-rich, Mixed Meal on Post-prandial Glycemia

NCT04877366
View directory record Official record
Conditions
Dietary Supplement
Interventions
Dietary Supplement: Sprinkled Format REDUCOSE., Reference control, Active comparator
Dietary Supplement · Other
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
19 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Tustin, California
Source: ClinicalTrials.gov public record
Updated Oct 15, 2024 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Assess the Effect of My Happy Flo on Alleviating Period Symptoms and Heavy Flows.

NCT06522672
View directory record Official record
Conditions
Menstrual Cramps, Women's Health, Fatigue
Interventions
My Happy Flo
Dietary Supplement
Lead sponsor
My Happy Flo
Industry
Eligibility
18 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Nov 20, 2024 · Synced Oct 6, 2026, 10:55 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

LungVITamin D and OmegA-3 Trial (lungVITAL)

NCT01728571
View directory record Official record
Conditions
COPD, Asthma, Pulmonary Function, Pneumonia
Interventions
Vitamin D3, fish oil, Vitamin D3 placebo, Fish oil placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 6, 2026, 10:55 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 6, 2026, 10:55 AM EDT
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 6, 2026, 10:55 AM EDT
Active, not recruiting Not applicable Interventional

Evaluating the Efficacy of the Flush Advanced+ Dietary Supplement Drink Mix Compared to a Placebo in Women Ages 18-75 With a History of Recurrent, Bothersome Urinary Tract Symptoms

NCT07856550
View directory record Official record
Conditions
Urinary Tract
Interventions
Flush Advanced+ Dietary Drink Mix, Placebo Dietary Drink Mix
Dietary Supplement
Lead sponsor
Bonafide Health
Industry
Eligibility
18 Years to 75 Years · Female only
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Harrison, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Nitroglycerin Ointment for Preventing Bone Loss in Postmenopausal Women

NCT00043719
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Nitroglycerin ointment, Calcium supplement with vitamin D
Drug
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
40 Years to 65 Years · Female only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2007
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 2, 2009 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Phase 3 Interventional Results available

Effect of Supplemental Vitamin D on Skeletal Muscle Function in Chronic Obstructive Pulmonary Disease (COPD) Patients

NCT00914810
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
Vitamin D (cholecalciferol), Placebo
Dietary Supplement
Lead sponsor
Minneapolis Veterans Affairs Medical Center
Federal
Eligibility
40 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 11, 2013 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional

Nutritional Supplements and Foot Surgery

NCT05522179
View directory record Official record
Conditions
Foot Injuries and Disorders
Interventions
NutraHeal, NutraHeal Plus
Dietary Supplement
Lead sponsor
NutraHeal
Industry
Eligibility
20 Years to 80 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
3
States / cities
Altoona, Pennsylvania • Ebensburg, Pennsylvania • State College, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Study of Bone Turnover Markers in Post-Menopausal Women With Osteoporosis Treated With Monthly Boniva (Ibandronate)

NCT00303485
View directory record Official record
Conditions
Post Menopausal Osteoporosis
Interventions
Placebo, Vitamin D and calcium supplementation, ibandronate [Bonviva/Boniva]
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
65 Years and older · Female only
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
7
States / cities
Beverly Hills, California • La Jolla, California • Augusta, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated May 2, 2016 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional

Efficacy of Plyometrics to Increase Bone Mass in Men With Osteopenia

NCT00572104
View directory record Official record
Conditions
Osteopenia
Interventions
resistance exercise, plyometric exercise
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
25 Years to 60 Years · Male only
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 7, 2016 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Phase 2 Interventional Results available

Sunshine 2 Study for Women With Diabetes

NCT01904032
View directory record Official record
Conditions
Diabetes, Depression, Quality of Life
Interventions
Vitamin D3, Vitamin D3 comparator
Drug
Lead sponsor
Loyola University
Other
Eligibility
21 Years and older · Female only
Enrollment
265 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 26, 2022 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function

NCT02293187
View directory record Official record
Conditions
Vitamin D Deficiency, Sarcopenia
Interventions
vitamin D3, Placebo
Dietary Supplement · Other
Lead sponsor
Tufts University
Other
Eligibility
60 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 21, 2019 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Efficacy of Vitamin D in Colorectal Cancer Chemoprevention

NCT01574027
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D3 (cholecalciferol), Placebo
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
50 Years and older
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 10, 2012 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A New Paradigm for Vitamin D Sufficiency

NCT02969850
View directory record Official record
Conditions
New Biomarkers for Measuring Vitamin D Level
Interventions
Vitamin D Supplementation, Placebo, Calcium
Dietary Supplement · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
60 Years to 90 Years · Female only
Enrollment
444 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Oct 22, 2021 · Synced Oct 6, 2026, 10:55 AM EDT
Not listed Not applicable Interventional

Prospective Study of Adjunctive Carotenoids Plus Anti-oxidants in Anti-VEGF Treated Diabetic Macular Edema

NCT03866005
View directory record Official record
Conditions
Center-involved Diabetic Macular Edema (CI-DME)
Interventions
Diabetes Visual Function Study (DiVFuSS) softgels, canola oil placebo softgels, 2 per day
Dietary Supplement · Other
Lead sponsor
ZeaVision, LLC
Industry
Eligibility
18 Years to 80 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
2
States / cities
Olympia, Washington • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jul 2, 2020 · Synced Oct 6, 2026, 10:55 AM EDT
Terminated Not applicable Interventional

Surgical vs. Lifestyle in Obese Older Adults

NCT03137329
View directory record Official record
Conditions
Obesity
Interventions
Exercise program, Nutrition, WLS
Behavioral · Dietary Supplement · Procedure
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
55 Years to 75 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 23, 2019 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Synbiotic Supplement on Metabolic & Cognitive Outcomes Among Older Adults

NCT06845995
View directory record Official record
Conditions
Older Adults, Bioelectrical Impedance, Appetite Hormones, Metabolic Health, Body Composition Measurement, Cognitive Health
Interventions
Synbiotic supplement
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
65 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Feb 25, 2025 · Synced Oct 6, 2026, 10:55 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Evaluating Response to Vitamin D3 and K2 Supplementation in Healthcare Personnel

NCT07199829
View directory record Official record
Conditions
Hypovitaminosis D, Hypovitaminosis
Interventions
Vitamin Arm 1, Vitamin Arm 2, Vitamin Arm 3, Placebo
Dietary Supplement · Other
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years to 69 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 6, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation in Healthy Adolescents

NCT01126671
View directory record Official record
Conditions
Vitamin D Supplementation
Interventions
Supplemental Vitamin D
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
11 Years to 18 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 4, 2018 · Synced Oct 6, 2026, 10:55 AM EDT