{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+Carbonate+500+MG",
    "query": {
      "intervention": "Calcium Carbonate 500 MG"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 22,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+Carbonate+500+MG&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-30T20:08:56.816Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT07763509",
      "title": "Calcium-Rich Food Versus Calcium Carbonate for Bone Health",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteopenia",
        "Osteoporosis",
        "Bone Health in Perimenopausal Women",
        "Menopause Related Conditions",
        "Fracture Healing"
      ],
      "interventions": [
        {
          "name": "500 mg calcium from milk-derived minerals",
          "type": "OTHER"
        },
        {
          "name": "Calcium Carbonate 500 MG",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "90 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 90 Years · Female only"
      },
      "enrollment_count": 217,
      "start_date": "2026-09-01",
      "completion_date": "2027-10-01",
      "has_results": false,
      "last_update_posted_date": "2026-08-13",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07763509"
    },
    {
      "nct_id": "NCT00650637",
      "title": "A Study to Determine Effective Prophylaxis and Treatment of Nelfinavir-Associated Diarrhea",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Diarrhea"
      ],
      "interventions": [
        {
          "name": "Calcium Carbonate",
          "type": "DRUG"
        },
        {
          "name": "nelfinavir",
          "type": "DRUG"
        },
        {
          "name": "lamivudine",
          "type": "DRUG"
        },
        {
          "name": "loperamide",
          "type": "DRUG"
        },
        {
          "name": "Calcium carbonate not administered",
          "type": "OTHER"
        },
        {
          "name": "lamivudine + zidovudine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 17,
      "start_date": "2003-01",
      "completion_date": "2003-08",
      "has_results": false,
      "last_update_posted_date": "2011-06-08",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 6,
      "location_summary": "Birmingham, Alabama • Fort Lauderdale, Florida • New York, New York + 3 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Huntersville",
          "state": "North Carolina"
        },
        {
          "city": "Austin",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00650637"
    },
    {
      "nct_id": "NCT01161407",
      "title": "Calcium and Phosphorus Balance and Calcium Kinetics in Patients With Stage 3/4 Chronic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "1500 mg/d elemental calcium as calcium carbonate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "35 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2010-06",
      "completion_date": "2011-11",
      "has_results": true,
      "last_update_posted_date": "2014-07-29",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01161407"
    },
    {
      "nct_id": "NCT01655810",
      "title": "Vitamin D, Cardiovascular Disease, and African Americans",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Type 2 Diabetes Mellitus",
        "Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium carbonate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "50 Years to 70 Years"
      },
      "enrollment_count": 86,
      "start_date": "2012-08-13",
      "completion_date": "2018-02-09",
      "has_results": false,
      "last_update_posted_date": "2020-06-05",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01655810"
    },
    {
      "nct_id": "NCT01357317",
      "title": "Study Comparing Effects of Lanthanum Carbonate Versus Calcium Acetate Versus Dietary Phosphorus Restriction",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Diet counseling",
          "type": "OTHER"
        },
        {
          "name": "Phosphorus binder",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Salem Veterans Affairs Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 120,
      "start_date": "2011-06",
      "completion_date": "2014-03",
      "has_results": false,
      "last_update_posted_date": "2012-06-12",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "Salem, Virginia",
      "locations": [
        {
          "city": "Salem",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01357317"
    },
    {
      "nct_id": "NCT00153816",
      "title": "Vitamin D/Calcium Polyp Prevention Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Colorectal Cancer",
        "Polyps",
        "Adenomas"
      ],
      "interventions": [
        {
          "name": "Calcium Carbonate",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Dartmouth-Hitchcock Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "45 Years to 75 Years"
      },
      "enrollment_count": 2813,
      "start_date": "2004-07",
      "completion_date": "2016-06",
      "has_results": true,
      "last_update_posted_date": "2017-03-15",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 10,
      "location_summary": "Los Angeles, California • Denver, Colorado • Atlanta, Georgia + 7 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00153816"
    },
    {
      "nct_id": "NCT00145704",
      "title": "Study of Adults With Low Growth Hormone Who Survived Childhood Cancer Where Treatment Caused Low Bone Density",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteopenia"
      ],
      "interventions": [
        {
          "name": "bisphosphonate therapy (risedronate)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "State University of New York - Upstate Medical University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 6,
      "start_date": "2002-06",
      "completion_date": "2008-10",
      "has_results": true,
      "last_update_posted_date": "2013-04-08",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "Syracuse, New York",
      "locations": [
        {
          "city": "Syracuse",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00145704"
    },
    {
      "nct_id": "NCT06352775",
      "title": "Calcium Carbonate on Labor Induction",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pregnancy",
        "Uterine Contraction"
      ],
      "interventions": [
        {
          "name": "Calcium Carbonate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 250,
      "start_date": "2024-06-01",
      "completion_date": "2026-12-30",
      "has_results": false,
      "last_update_posted_date": "2025-11-21",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "Milwaukee, Wisconsin",
      "locations": [
        {
          "city": "Milwaukee",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06352775"
    },
    {
      "nct_id": "NCT00785629",
      "title": "A Double Blind Randomized Placebo Trial of Maintenance of Normal Serum Phosphorus in CKD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Calcium acetate",
          "type": "DRUG"
        },
        {
          "name": "Lanthanum Carbonate",
          "type": "DRUG"
        },
        {
          "name": "Sevelamer Carbonate",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Denver Nephrologists, P.C.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 148,
      "start_date": "2009-02",
      "completion_date": "2011-07",
      "has_results": true,
      "last_update_posted_date": "2012-10-30",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00785629"
    },
    {
      "nct_id": "NCT01403051",
      "title": "High Dose Vitamin D and Calcium for Bone Health in Individuals Initiating HAART",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "HIV-1 Infection"
      ],
      "interventions": [
        {
          "name": "EFV/FTC/TDF",
          "type": "DRUG"
        },
        {
          "name": "Calcium Carbonate",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo for calcium carbonate",
          "type": "DRUG"
        },
        {
          "name": "Placebo for vitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 167,
      "start_date": "2011-09",
      "completion_date": "2013-02",
      "has_results": true,
      "last_update_posted_date": "2018-10-12",
      "last_synced_at": "2026-09-30T20:08:56.816Z",
      "location_count": 38,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • Palo Alto, California + 27 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01403051"
    }
  ]
}