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ClinicalTrials.gov public records Last synced Oct 25, 2026, 1:27 PM EDT

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Showing 1–24 of 138 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Chewable Calcium Clear all
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 24, 2019 · Synced Oct 25, 2026, 1:27 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 7, 2019 · Synced Oct 25, 2026, 1:27 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 10, 2013 · Synced Oct 25, 2026, 1:27 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 30, 2017 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Phase II Study of Ovulation in Obese Women

NCT06306131
View directory record Official record
Conditions
Pregnancy Prevention
Interventions
Levonorgestrel 1.5 milligram, Meloxicam 15 milligram, calcium carbonate 750 milligram
Drug · Other
Lead sponsor
InnovaGyn, Inc.
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Clinical Efficacy of 10% Arginine Bicarbonate Prophylaxis Paste

NCT01072188
View directory record Official record
Conditions
Hypersensitivity
Interventions
Arginine/Calcium Carbonate, Nupro - Fluoride Free
Device
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 70 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Langhorne, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 14, 2011 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional

The Effect of Alendronate, Calcium, and Vitamin D on Bone Mineral Density in HIV Infected Patients

NCT00061256
View directory record Official record
Conditions
HIV Infections
Interventions
Alendronate, Calcium carbonate, Vitamin D
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
25 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2006
U.S. locations
28
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 17 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2009 · Synced Oct 25, 2026, 1:27 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 Sep 18, 2026 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Not applicable Interventional

Calcium, Dairy, and Body Fat in Adolescents

NCT00592137
View directory record Official record
Conditions
Obesity, Energy Metabolism
Interventions
C (smoothies based on soy protein containing no additional calcium), B (smoothies based on soy protein containing calcium), A (smoothies based on dairy protein containing calcium)
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
12 Years to 15 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Jan 13, 2010 · Synced Oct 25, 2026, 1:27 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 13, 2026 · Synced Oct 25, 2026, 1:27 PM 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 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional

Calcium and Vitamin D vs Markers of Adenomatous Polyps

NCT00208793
View directory record Official record
Conditions
Colorectal Adenomatous Polyps
Interventions
Calcium and vitamin D3 combined, Placebo, Calcium, Vitamin D3
Dietary Supplement · Drug
Lead sponsor
Emory University
Other
Eligibility
30 Years to 74 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 26, 2013 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Nuun SPORT on Subjective Exercise Performance in Male and Female Runners

NCT05510791
View directory record Official record
Conditions
Hydration
Interventions
Nuun Sport Drink, Control
Dietary Supplement
Lead sponsor
University of Memphis
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 22, 2022 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Preoperative Calcium and Calcitriol Decrease Rates of Post Thyroidectomy Hypocalcemia?

NCT03869398
View directory record Official record
Conditions
Hypocalcemia, Thyroid Diseases
Interventions
Tums, Calcitriol
Dietary Supplement
Lead sponsor
Lahey Clinic
Other
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Burlington, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 9, 2019 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Phase 2 Reduction of Dietary Mycotoxin Exposure by ACCS100"

NCT01677195
View directory record Official record
Conditions
Dietary Carcinogenesis
Interventions
ACCS100, Placebo
Drug
Lead sponsor
Texas Enterosorbents Incorporated
Industry
Eligibility
18 Years to 85 Years
Enrollment
234 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 19, 2016 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2Phase 3 Interventional

Oral Calcium Supplementation in Labor

NCT07056062
View directory record Official record
Conditions
Uterine Contraction, Labor Complication, Labor Active Dilated Cm, Labor Dystocia, Labor Duration, Labor, Labor Delivery
Interventions
Calcium carbonate
Drug
Lead sponsor
Arrowhead Regional Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Colton, California
Source: ClinicalTrials.gov public record
Updated Jul 9, 2025 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effects of Carbohydrate in Diet and Supplements on the Gastrointestinal Tolerability of LIK066

NCT03198767
View directory record Official record
Conditions
Obesity
Interventions
LIK066, Carbohydrate 50%, Carbohydrate 25%, Carbohydrate 8%, Carbohydrate 0%, Psyllium, Calcium carbonate
Drug · Dietary Supplement
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional Results available

Adding Phosphorus to Osteoporosis Drug Treatment

NCT00074711
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Calcium carbonate, Calcium Phosphate
Drug
Lead sponsor
Creighton University
Other
Eligibility
60 Years to 85 Years · Female only
Enrollment
241 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 6, 2016 · Synced Oct 25, 2026, 1:27 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 25, 2013 · Synced Oct 25, 2026, 1:27 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 10, 2016 · Synced Oct 25, 2026, 1:27 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Ultrasound Effects on Human Motor Cortical Plasticity

NCT04168762
View directory record Official record
Conditions
Healthy Participants
Interventions
Transcranial Ultrasound Magnetic Stimulation
Other
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2019 · Synced Oct 25, 2026, 1:27 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Novel Oral Natural Extract for the Treatment of Senile Purpura

NCT01183910
View directory record Official record
Conditions
PURPURA
Interventions
Citrus Bioflavanoid Blend, Calcium Carbonate
Dietary Supplement
Lead sponsor
Nexgen Dermatologics, Inc.
Industry
Eligibility
40 Years and older
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boynton Beach, Florida
Source: ClinicalTrials.gov public record
Updated Jun 8, 2011 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Not applicable Interventional Results available

Effects of Zoledronic Acid Versus Alendronate on Bone Loss After Kidney and Kidney/Pancreas Transplants

NCT00580047
View directory record Official record
Conditions
Renal Insufficiency
Interventions
Zoledronic Acid, Calcium with vitamin D, Alendronate
Drug · Combination Product
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2014
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Oct 25, 2026, 1:27 PM EDT
Completed Phase 2 Interventional Results available

Proof of Concept Study Efficacy of an Antacid/Lansoprazole Combination for Relief of Heartburn

NCT01037452
View directory record Official record
Conditions
Heartburn
Interventions
Calcium carbonate/magnesium hydroxide/Lansoprazole 15 mg, Lansoprazole, Calcium carbonate/magnesium hydroxide, Placebo
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
1
States / cities
Anaheim, California
Source: ClinicalTrials.gov public record
Updated Mar 28, 2011 · Synced Oct 25, 2026, 1:27 PM EDT