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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Chewable Calcium Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Food and Calcium on Pharmacokinetics of a Single Dose of S-888711 in Healthy Adult Volunteers

NCT03897413
View directory record Official record
Conditions
Healthy Volunteer
Interventions
S-888711, Calcium Antacid
Drug · Dietary Supplement
Lead sponsor
Shionogi
Industry
Eligibility
18 Years to 70 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Mar 31, 2019 · Synced Sep 10, 2026, 4:15 PM EDT
Completed No phase listed Observational

Prediction of the SURPASS-CVOT Cardiovascular Outcome Trial in Healthcare Claims Data

NCT07088718
View directory record Official record
Conditions
Type 2 Diabetes, Major Adverse Cardiac Events, Cardiovascular (CV) Risk
Interventions
Tirzepatide, Dulaglutide
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
40 Years and older
Enrollment
44,671 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Clinical Efficacy of a Toothpaste on Hypersensitivity Reduction

NCT01040169
View directory record Official record
Conditions
Hypersensitivity
Interventions
Arginine/Calcium Carbonate, Mint Prophy paste - Fluoride free
Device
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 70 Years
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 9, 2013 · Synced Sep 10, 2026, 4:15 PM EDT
Active, not recruiting Phase 3 Interventional

Ropeginterferon Alfa-2b (P1101) vs. Anagrelide in Essential Thrombocythemia Patients With Hydroxyurea Resistance or Intolerance

NCT04285086
View directory record Official record
Conditions
Essential Thrombocythemia
Interventions
Ropeginterferon alfa-2b, Anagrelide
Biological · Drug
Lead sponsor
PharmaEssentia
Industry
Eligibility
18 Years and older
Enrollment
174 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
4
States / cities
Scottsdale, Arizona • St Louis, Missouri • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Phase 3 Interventional

Supplementation With Vitamin D, Calcium or Both on Calcium Absorption and Bone Mineral Content in Children With JRA

NCT00570934
View directory record Official record
Conditions
Juvenile Rheumatoid Arthritis
Interventions
Cholecalciferol, Calcium, Calcium and cholecalciferol, Placebo
Dietary Supplement · Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
3 Years to 15 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2002
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 9, 2016 · Synced Sep 10, 2026, 4:15 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Study of Changes in Bone Mineral Density as a Function of Consuming Two Different Forms of Calcium Carbonate

NCT01857154
View directory record Official record
Conditions
Osteopenia, Osteoporosis
Interventions
Micronized Calcium Carbonate, Non-Micronized Calcium Carbonate, Vitamin D3
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
21 Years and older
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Phase 3 Interventional Results available

A Double-Blind, Placebo-Controlled Trial of Anti-Aging, Pro-Autophagy Effects of Metformin in Adults With Prediabetes

NCT03309007
View directory record Official record
Conditions
PreDiabetes, Aging
Interventions
Metformin, Placebo Oral Tablet
Drug
Lead sponsor
University of New Mexico
Other
Eligibility
30 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Dec 10, 2023 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Nuun Instant on Hydration Status in Active Men and Women

NCT04764565
View directory record Official record
Conditions
Hydration
Interventions
Nuun Instant, Water, Nuun Electrolyte
Dietary Supplement · Other
Lead sponsor
University of Memphis
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 27, 2021 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Phase 2 Interventional Results available

High Dose Vitamin D and Calcium for Bone Health in Individuals Initiating HAART

NCT01403051
View directory record Official record
Conditions
HIV-1 Infection
Interventions
EFV/FTC/TDF, Calcium Carbonate, Vitamin D3, Placebo for calcium carbonate, Placebo for vitamin D3
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
18 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
38
States / cities
Birmingham, Alabama • Los Angeles, California • Palo Alto, California + 27 more
Source: ClinicalTrials.gov public record
Updated Oct 11, 2018 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Phase 3 Interventional Results available

Secondary Prevention of Osteoporosis

NCT00421343
View directory record Official record
Conditions
Osteoporosis
Interventions
alendronate with cholecalciferol, calcium carbonate with cholecalciferol, Falls prevention measures
Drug · Behavioral
Lead sponsor
Hebrew SeniorLife
Other
Eligibility
65 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Intramuscular Ketorolac Versus Oral Ibuprofen for Pain Relief in First Trimester Suction Curettage

NCT01595282
View directory record Official record
Conditions
Pain
Interventions
Ketorolac, Ibuprofen
Drug
Lead sponsor
Planned Parenthood League of Massachusetts
Other
Eligibility
18 Years and older · Female only
Enrollment
94 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 1, 2014 · Synced Sep 10, 2026, 4:15 PM EDT
Terminated Phase 3 Interventional Results available

A Study to Investigate the Safety and Efficacy of PA21 (Velphoro®) and Calcium Acetate (Phoslyra®) in Paediatric and Adolescent Chronic Kidney Disease (CKD) Patients With Hyperphosphataemia

NCT02688764
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
PA21 (Velphoro®), Calcium Acetate (Phoslyra®)
Drug
Lead sponsor
Vifor Fresenius Medical Care Renal Pharma
Industry
Eligibility
Up to 18 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
22
States / cities
Birmingham, Alabama • Washington D.C., District of Columbia • Miami, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2019 · Synced Sep 10, 2026, 4:15 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 10, 2026, 4:15 PM EDT
Completed Phase 2 Interventional Results available

Safety and Efficacy of Alendronate (Fosamax) in Children With Osteoporosis

NCT00259857
View directory record Official record
Conditions
Osteoporosis
Interventions
Alendronate
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
5 Years to 15 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 18, 2011 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Phase 4 Interventional Results available

A Study of Tirzepatide (LY3298176) in Adult Participants With Type 2 Diabetes Switching From Dulaglutide (SURPASS-SWITCH)

NCT05564039
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Tirzepatide, Dulaglutide
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
282 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
11
States / cities
Cooper City, Florida • West Palm Beach, Florida • Skokie, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Aug 2, 2025 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Phase 3 Interventional Results available

Heartland Osteoporosis Prevention Study

NCT02186600
View directory record Official record
Conditions
Osteopenia
Interventions
Calcium Carbonate, Vitamin D3, Risedronate, Bone-loading exercises
Drug · Behavioral
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older · Female only
Enrollment
276 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Sep 10, 2026, 4:15 PM EDT
Completed No phase listed Observational

Comparative Study of Tirzepatide Versus Dulaglutide (SURPASS CVOT) or Semaglutide on Major Cardiovascular Events in Participants With Type 2 Diabetes

NCT06779929
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Tirzepatide, Dulaglutide, Semaglutide
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
40 Years and older
Enrollment
70,000 participants
Timeline
2024 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 10, 2026, 4:15 PM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

PhytoSERM to Prevent Menopause Associated Decline in Brain Metabolism and Cognition

NCT05664477
View directory record Official record
Conditions
Menopause, Cognitive Change, Brain Disorder, Metabolic
Interventions
PhytoSERM, Placebo
Dietary Supplement · Drug
Lead sponsor
Roberta Brinton
Other
Eligibility
45 Years to 60 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
2
States / cities
Tucson, Arizona • New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Sep 10, 2026, 4:15 PM 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 23, 2013 · Synced Sep 10, 2026, 4:15 PM EDT
Completed No phase listed Observational

SURPASS Impella 5.5 Study

NCT05100836
View directory record Official record
Conditions
Cardiogenic Shock, Acute Decompensated Heart Failure
Interventions
Impella 5.5
Device
Lead sponsor
Abiomed Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,017 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
15
States / cities
Los Angeles, California • Orlando, Florida • Tampa, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated May 19, 2025 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Not applicable Interventional

Randomized Study of Alendronate in Adult Patients With Cystic Fibrosis Related Osteoporosis

NCT00004489
View directory record Official record
Conditions
Osteoporosis, Cystic Fibrosis
Interventions
alendronate sodium, calcium carbonate, cholecalciferol
Drug
Lead sponsor
University of North Carolina
Other
Eligibility
18 Years to 45 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2002
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 24, 2015 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Not applicable Interventional

Patient-Executed, Clinician-Confirmed Diuretic Titration in Pulmonary Artery Pressure-Guided Heart Failure (SURPASS-HF)

NCT07743125
View directory record Official record
Conditions
Heart Failure
Interventions
Shared-management diuretic titration guided by remote PA pressure monitoring
Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
40 Years to 90 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Menomonee Falls, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 2, 2026 · Synced Sep 10, 2026, 4:15 PM EDT
Terminated Not applicable Interventional Results available

Study of Adults With Low Growth Hormone Who Survived Childhood Cancer Where Treatment Caused Low Bone Density

NCT00145704
View directory record Official record
Conditions
Osteopenia
Interventions
bisphosphonate therapy (risedronate), Vitamin D supplement, Calcium
Drug · Dietary Supplement
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2008
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Apr 7, 2013 · Synced Sep 10, 2026, 4:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Taking Prenatal Vitamin-mineral Supplements During Lactation on Iron Status and Markers of Oxidation

NCT01047098
View directory record Official record
Conditions
Iron Overload, Oxidative Stress, Iron-deficiency Anemia
Interventions
Iron, Placebo
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older · Female only
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 10, 2026, 4:15 PM EDT