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Showing 1–24 of 125 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Calcium Supplement Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Soy, Bone and Health in College Females

NCT00244478
View directory record Official record
Conditions
Osteoporosis, Obesity
Interventions
Soy Protein Dietary Supplement, Placebo
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 19 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 24, 2015 · Synced Sep 3, 2026, 10:09 PM EDT
Terminated Phase 3 Interventional Results available

Safety and Efficacy Study of rhPTH(1-84) in Subjects With Hypoparathyroidism

NCT03364738
View directory record Official record
Conditions
Hypoparathyroidism
Interventions
rhPTH(1-84)
Biological
Lead sponsor
Shire
Industry
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
5
States / cities
Lexington, Kentucky • Metairie, Louisiana • Reno, Nevada + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Calcium on Tasigna Pharmacokinetics (PK) in Healthy Volunteers

NCT00732888
View directory record Official record
Conditions
Healthy
Interventions
Nilotinib Hydrochloride, calcium carbonate
Drug · Dietary Supplement
Lead sponsor
Jan Beumer
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 17, 2013 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Phase 4 Interventional Results available

Zoledronic Acid for Osteoporotic Fracture Prevention (ZEST II)

NCT02589600
View directory record Official record
Conditions
Osteoporotic Fractures, Osteoporosis, Postmenopausal
Interventions
Zoledronic acid, vitamin D, calcium, Saline
Drug · Dietary Supplement · Other
Lead sponsor
Susan L. Greenspan
Other
Eligibility
65 Years and older · Female only
Enrollment
310 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
New Kensington, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 25, 2023 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional

Therapeutic Diets in Alzheimer's Disease

NCT03860792
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Ketogenic Diet, Therapeutic Lifestyles Changes Diet
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
50 Years to 90 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Fairway, Kansas
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional

Pamidronate, Vitamin D, and Calcium for the Bone Disease of Kidney and Heart Transplantation

NCT00302627
View directory record Official record
Conditions
Transplant Bone Disease
Interventions
Pamidronate, vitamin D, Calcium Carbonate
Drug
Lead sponsor
Providence Health & Services
Other
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated Aug 28, 2018 · Synced Sep 3, 2026, 10:09 PM 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 1, 2016 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Phase 2 Interventional Results available

A Study of Oral Recombinant Salmon Calcitonin (rsCT) to Prevent Postmenopausal Osteoporosis

NCT01292187
View directory record Official record
Conditions
Osteopenia
Interventions
Oral calcitonin at dinnertime, Oral placebo at dinnertime, Oral calcitonin at bedtime, Oral placebo at bedtime
Drug
Lead sponsor
Tarsa Therapeutics, Inc.
Industry
Eligibility
45 Years and older · Female only
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
10
States / cities
Walnut Creek, California • Clearwater, Florida • Bethesda, Maryland + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2014 · Synced Sep 3, 2026, 10:09 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 3, 2026, 10:09 PM 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 6, 2016 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Calcium Supplement Particle Size and Vitamin D Supplement on Calcium Retention in Adolescent Girls

NCT01005381
View directory record Official record
Conditions
Osteoporosis
Interventions
Small Particle Size Calcium Carbonate Supplement, Large Particle Size Calcium Carbonate Supplement, Vitamin D, Calcium Placebo
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
12 Years to 14 Years · Female only
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 8, 2018 · Synced Sep 3, 2026, 10:09 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Renal Metabolism of Glycolate to Oxalate

NCT04437225
View directory record Official record
Conditions
Healthy
Interventions
Low oxalate controlled Diet, Primed, continuous intravenous infusion of 13C2-Glycolate, Bolus intravenous infusion of 13C2-Glycolate, Oral bolus administration of 13C2-Glycolate
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effectiveness of Supplemental Calcium in Preventing Postpartum Depression

NCT00228033
View directory record Official record
Conditions
Depression, Depression, Postpartum
Interventions
Elemental calcium (as carbonate)
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older · Female only
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2007
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 19, 2014 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Double-Blind, Randomized, Placebo-Controlled Study of the Safety and Effects of Various Cannabinoids on Sleep Quality

NCT07769164
View directory record Official record
Conditions
Sleep Disturbance, Sleep Quality
Interventions
2 mg THC + 2 mg CBN + 2 mg CBG + 10 mg CBD + 1 mg Melatonin, 10 mg THC + 5 mg CBN + 5 mg CBG + 20 mg CBD, 10 mg THC + 20 mg CBN + 5 mg CBG, Stay Asleep Placebo, Fast Asleep Placebo
Dietary Supplement
Lead sponsor
Cannabis Science Innovations, LLC
Industry
Eligibility
21 Years to 55 Years
Enrollment
332 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Sarasota, Florida
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 3, 2026, 10:09 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 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Clinical Trial to Evaluate the Effects of a Supplement on Supporting Signs of a Healthy Metabolism

NCT07765407
View directory record Official record
Conditions
Poor Energy Levels, Poor Metabolism, Difficulty With Weight Management, Bloating
Interventions
Love Wellness Energize
Dietary Supplement
Lead sponsor
Love Wellness
Industry
Eligibility
25 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 3, 2026, 10:09 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

HMB Cerebral Palsy Pilot Study

NCT05384951
View directory record Official record
Conditions
Cerebral Palsy
Interventions
HMB + Vitamin D3
Dietary Supplement
Lead sponsor
Gillette Children's Specialty Healthcare
Other
Eligibility
13 Years to 17 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 21, 2024 · Synced Sep 3, 2026, 10:09 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Oxalate-Driven Host Responses in Kidney Stone Disease

NCT05417568
View directory record Official record
Conditions
Kidney Stones
Interventions
Low Oxalate Diet, High Oxalate Diet
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 60 Years
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Inorganic Nitrate Supplement on Blood Pressure

NCT03909789
View directory record Official record
Conditions
Blood Pressure, Endothelial Dysfunction
Interventions
Plant based bioequivalent Nitrate supplementation, Placebo
Dietary Supplement
Lead sponsor
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center
Other
Eligibility
40 Years to 75 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Torrance, California
Source: ClinicalTrials.gov public record
Updated Apr 11, 2019 · Synced Sep 3, 2026, 10:09 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 3, 2026, 10:09 PM 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 22, 2019 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Phase 1 Interventional

Cord Blood Plus Vitamin D and Omega 3s in T1D

NCT00873925
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Autologous UCB, Omega 3 FA, Vitamin D
Biological · Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
1 Year to 18 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 3, 2013 · Synced Sep 3, 2026, 10:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Healthy Brains & Behavior: Understanding and Treating Youth Aggression

NCT00842439
View directory record Official record
Conditions
Aggression
Interventions
CBI, NUT
Behavioral · Dietary Supplement
Lead sponsor
University of Pennsylvania
Other
Eligibility
11 Years to 12 Years
Enrollment
335 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 18, 2016 · Synced Sep 3, 2026, 10:09 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Prunes Preventing Bone Loss in Perimenopause

NCT07120997
View directory record Official record
Conditions
Perimenopausal Bone Loss
Interventions
Prunes, Calcium supplement, Vitamin D Supplement
Dietary Supplement
Lead sponsor
Penn State University
Other
Eligibility
44 Years to 55 Years · Female only
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Sep 3, 2026, 10:09 PM EDT