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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Calcium supplementation Clear all
Completed Not applicable Interventional

Treating Oxidative Stress and the Metabolic Pathology of Autism

NCT00572741
View directory record Official record
Conditions
Autistic Disorder
Interventions
B12, Placebo, folate, B complex, vitamin C, cod liver oil, Mineral complex, carnitine
Dietary Supplement
Lead sponsor
Arkansas Children's Hospital Research Institute
Other
Eligibility
3 Years to 7 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated May 4, 2016 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Vitamin D HIV Study on Postmenopausal Women

NCT01375010
View directory record Official record
Conditions
HIV
Interventions
Vitamin D3, Placebo, Vitamin Supplements
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 6, 2019 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Clinical Trial of Vitamin D3 to Reduce Cancer Risk in Postmenopausal Women

NCT01052051
View directory record Official record
Conditions
Cancer
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
55 Years and older · Female only
Enrollment
2,303 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Fremont, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 23, 2019 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 1 Interventional

Zoledronic Acid (ZOMETA) With Cyclophosphamide With Neuroblastoma and Cortical Bone Involvement

NCT00206388
View directory record Official record
Conditions
NEUROBLASTOMA
Interventions
Zolendric acid, Cyclophosphamide
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 30 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
8
States / cities
Los Angeles, California • San Francisco, California • Stanford, California + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2013 · Synced Sep 21, 2026, 5:50 PM 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 Jul 31, 2023 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional

Calcium Metabolism in Asian Adolescents

NCT00591708
View directory record Official record
Conditions
Bone Mineralization, Adolescent Development
Interventions
Beverage containing calcium citrate malate, Beverage fortified with calcium citrate malate
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
11 Years to 15 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 8, 2018 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nutritional Intervention for Age-related Muscular Function and Strength Losses-Study 2

NCT02043171
View directory record Official record
Conditions
Sarcopenia
Interventions
Placebo, HMB plus Vitamin D, Non-Exercise, Exercise
Dietary Supplement · Drug · Behavioral
Lead sponsor
Metabolic Technologies Inc.
Industry
Eligibility
60 Years and older
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Ames, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 10, 2019 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Calcium and Vitamin D Supplementation During Marine Corps Training

NCT02636348
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Oct 27, 2016 · Synced Sep 21, 2026, 5:50 PM EDT
Terminated Phase 4 Interventional Results available

Efficacy of PRGF Supplementation After TMJ Arthrocentesis in Patients With TMJ Osteoarthritis

NCT04731233
View directory record Official record
Conditions
TMJ, Osteoarthritis
Interventions
Plasma Rich in Growth Factor (PRGF) Supplementation, Triamcinolone Acetonide
Biological · Drug
Lead sponsor
University of Florida
Other
Eligibility
40 Years to 80 Years · Female only
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 2 Interventional Results available

Treatment of Hypoparathyroidism With Synthetic Human Parathyroid Hormone 1-34

NCT00001304
View directory record Official record
Conditions
Hypoparathyroidism
Interventions
Synthetic Human Parathyroid Hormone 1-34, Calcitriol & Calcium
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
17 Years to 69 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1991 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 14, 2015 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 1 Interventional Results available

Study to Evaluate Romosozumab in Children and Adolescents With Osteogenesis Imperfecta

NCT04545554
View directory record Official record
Conditions
Osteogenesis Imperfecta
Interventions
Romosozumab, Calcium, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Amgen
Industry
Eligibility
5 Years to 17 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
3
States / cities
Indianapolis, Indiana • Nashville, Tennessee • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 14, 2024 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 1 Interventional

Aquamin and Prevention of Colon Cancer

NCT02647671
View directory record Official record
Conditions
Colonic Cancer
Interventions
Aquamin®, Calcium Carbonate, Placebo
Drug
Lead sponsor
James Varani
Other
Eligibility
18 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 11, 2021 · Synced Sep 21, 2026, 5:50 PM 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 9, 2010 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Phase 2 Interventional

Vitamin D3 Supplementation for Heart Failure Patients

NCT01636570
View directory record Official record
Conditions
Heart Failure, Vitamin D Deficiency, Cardiomyopathy, Congestive Heart Failure
Interventions
Placebo Comparator: Sugar Pill, Vitamin D3 (cholecalciferol)
Drug
Lead sponsor
Heidi Moretti, MS, RD
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Missoula, Montana
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients

NCT01385098
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Vitamin D3 and Calcium
Dietary Supplement
Lead sponsor
Vadim Sherman, MD
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Sep 21, 2026, 5:50 PM EDT
Terminated Phase 3 Interventional Results available

Efficacy and Safety of Cinacalcet in Pediatric Patients With Secondary Hyperparathyroidism (SHPT) and Chronic Kidney Disease (CKD) on Dialysis

NCT02138838
View directory record Official record
Conditions
Chronic Kidney Disease, Secondary Hyperparathyroidism
Interventions
Cinacalcet HCl, Standard of Care
Drug · Dietary Supplement
Lead sponsor
Amgen
Industry
Eligibility
6 Years to 17 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
26
States / cities
Los Angeles, California • Wilmington, Delaware • Atlanta, Georgia + 22 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2020 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Calcium Supplementation for a Healthy Weight (CaSHeW)

NCT01363115
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Orange Juice fortified with Calcium and Vitamin D, Orange juice without Ca or VitD, Nutritional Counseling
Dietary Supplement · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 31, 2011 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Vitamin D Supplementation and Physical Function in Older Adults

NCT01179503
View directory record Official record
Conditions
Physical Function, Vitamin D Insufficiency
Interventions
calcium, Vitamin D plus calcium
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
70 Years to 89 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 16, 2018 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

CARDIA-Salt Sensitivity of Blood Pressure (SSBP)

NCT04258332
View directory record Official record
Conditions
Salt Sensitivity of Blood Pressure, Hypertension
Interventions
High Salt Diet, Low Salt Diet
Dietary Supplement
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
50 Years to 70 Years
Enrollment
281 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
2
States / cities
Birmingham, Alabama • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Comparing a Novel Phototherapy Kiosk to Oral Vitamin D Supplementation

NCT04556136
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Standing Phototherapy Kiosk, D3 Oral supplement
Device · Dietary Supplement
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years to 69 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Time-Restricted Feeding Plus Resistance Training in Active Females

NCT03404271
View directory record Official record
Conditions
Healthy Active Females
Interventions
Beta-hydroxy beta-methylbutyrate, Resistance Training, Protein Supplementation, Time-Restricted Feeding
Dietary Supplement · Other · Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Sep 11, 2018 · Synced Sep 21, 2026, 5:50 PM 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 21, 2021 · Synced Sep 21, 2026, 5:50 PM EDT
Not listed Phase 4 Interventional

The Effect of Vitamin D Supplementation on Calcium Excretion in Thalassemia: a Dose Response Study

NCT01323608
View directory record Official record
Conditions
Thalassemia Major
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
6 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 18, 2011 · Synced Sep 21, 2026, 5:50 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Calcium Supplementation for a Healthy Weight-Lite (CaSHeW Lite)

NCT00386672
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Reduced energy (lite) OJ fortified with Calcium and Vitamin D, Nutrition Counseling, Reduced energy (lite) OJ without Calcium and Vitamin D
Dietary Supplement · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 9, 2017 · Synced Sep 21, 2026, 5:50 PM EDT