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ClinicalTrials.gov public records Last synced Nov 15, 2026, 8:01 AM EST

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Showing 1–24 of 38 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: cholecalciferol plus calcium carbonate Clear all

Conditions: Complications of Bariatric Procedures, Avitaminosis
Interventions: Chewable Multivitamin with Iron, PatchMD Vitamin D3/Calcium Patch, PatchMD Multivitamin Patch, PatchMD B12 Energy Plus Patch, Chewable Calcium, Quick Dissolve B12; Dietary Supplement
Lead sponsor: California State Polytechnic University, Pomona; Other
Eligibility: 18 Years to 65 Years
Enrollment: 30 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2017
U.S. locations: 1
States / cities: Brea, California

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

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

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

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

Conditions: Colorectal Cancer, Polyps, Adenomas
Interventions: Calcium Carbonate, Vitamin D3, placebo; Drug
Lead sponsor: Dartmouth-Hitchcock Medical Center; Other
Eligibility: 45 Years to 75 Years
Enrollment: 2,813 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2004 – 2016
U.S. locations: 10
States / cities: Los Angeles, California • Denver, Colorado • Atlanta, Georgia + 7 more

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

Conditions: Breast Neoplasms
Interventions: Exemestane, Calcium carbonate, Vitamin D; Drug · Dietary Supplement
Lead sponsor: Georgetown University; Other
Eligibility: Female only
Enrollment: 46 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2003 – 2011
U.S. locations: 2
States / cities: Washington D.C., District of Columbia • Bethesda, Maryland

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

Conditions: Breast Neoplasms
Interventions: Vitamin D, Calcium carbonate, Vitamin D, Placebo; Dietary Supplement · Drug · Other
Lead sponsor: Washington University School of Medicine; Other
Eligibility: 18 Years and older · Female only
Enrollment: 63 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2005 – 2009
U.S. locations: 1
States / cities: St Louis, Missouri

Conditions: HIV Infection, Bone Mass
Interventions: cholecalciferol plus calcium carbonate; Dietary Supplement
Lead sponsor: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK); NIH
Eligibility: 6 Years to 16 Years
Enrollment: 59 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2003 – 2006
U.S. locations: 1
States / cities: New York, New York

Conditions: Osteoporosis, Prostate Cancer
Interventions: calcium carbonate, cholecalciferol, Estrogen Antagonists, risedronate sodium, placebo; Dietary Supplement · Drug · Other
Lead sponsor: Alliance for Clinical Trials in Oncology; Other
Eligibility: 18 Years and older · Male only
Enrollment: 71 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2002 – 2010
U.S. locations: 112
States / cities: Scottsdale, Arizona • Jacksonville, Florida • Aurora, Illinois + 71 more

Conditions: Diabetic Kidney Disease
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 18 Years and older
Enrollment: 54 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2013
U.S. locations: 1
States / cities: Charleston, South Carolina

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

Conditions: Spinal Cord Injury
Interventions: Vitamin D and Calcium; Dietary Supplement
Lead sponsor: US Department of Veterans Affairs; Federal
Eligibility: 18 Years to 75 Years
Enrollment: 10 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: The Bronx, New York

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

Conditions: Adenomatous Polyps
Interventions: 0.5 mg calcitriol (1a -25-dihydroxycholecalciferol), 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3), placebo to 0.5 mg calcitriol (1a -25-dihydroxycholecalciferol), placebo to 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3), Colonoscopy; Drug · Procedure
Lead sponsor: Colotech A/S; Industry
Eligibility: 40 Years to 75 Years
Enrollment: 350 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2007 – 2010
U.S. locations: 24
States / cities: Huntsville, Alabama • San Diego, California • Clearwater, Florida + 20 more

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

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

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

Conditions: Delusion of Reference
Interventions: Endocrine Society UL Dosage Vitamin D, Institute of Medicine Dosage Vitamin D, Calcium; Dietary Supplement
Lead sponsor: Winthrop University Hospital; Other
Eligibility: 50 Years to 90 Years · Female only
Enrollment: 132 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2016
U.S. locations: 1
States / cities: Mineola, New York

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

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

Conditions: Risperidone-induced Hyperprolactinemia
Interventions: Calcium and Vitamin D, Placebo; Drug · Other
Lead sponsor: Chadi A. Calarge; Other
Eligibility: 5 Years to 17 Years · Male only
Enrollment: 47 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2014
U.S. locations: 1
States / cities: Iowa City, Iowa

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Vitamin Supplementation After Bariatric Surgery

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

Heartland Osteoporosis Prevention Study

Treatment of Hypoparathyroidism With Synthetic Human Parathyroid Hormone 1-34

Calcium and Vitamin D vs Markers of Adenomatous Polyps

Vitamin D/Calcium Polyp Prevention Study

Vitamin D Supplementation and Physical Function in Older Adults

Exemestane and Celecoxib in Postmenopausal Women at High Risk for Breast Cancer

Vitamin D HIV Study on Postmenopausal Women

High Dose Vit D Musculoskeletal Symptoms & Bone Density in Anastrozole-Treated Breast Cancer With Marginal Vit D Status

The Effect of Vitamin D and Calcium on Bone in Pediatric HIV

Calcium With or Without Estrogen and/or Risedronate in Preventing Osteoporosis in Patients With Prostate Cancer

Impact of Vitamin D on Diabetic Kidney Disease in African Americans

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

Vitamin D and Calcium Study

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

Chemoprevention of Colorectal Adenomas

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

Effect of Alendronate on Bone in People With Chronic Spinal Cord Injury (SCI) Previously Treated With Teriparatide

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

Study the Effects of Vitamin D and Calcium Supplementation at Tolerable Upper Limit Doses on Calcium Metabolism.

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

Adding Phosphorus to Osteoporosis Drug Treatment

Calcium and Vitamin D to Optimize Bone Mass in Boys With Risperidone-induced Hyperprolactinemia