{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+%26+Vitamin+D&page=2",
    "query": {
      "intervention": "Calcium & Vitamin D",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 234,
    "total_pages": 24,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+%26+Vitamin+D&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+%26+Vitamin+D&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T19:24:10.808Z",
  "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": "NCT01507662",
      "title": "Patient Activation After DXA Result Notification",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteoporosis",
        "Bone Diseases, Metabolic"
      ],
      "interventions": [
        {
          "name": "Bone Mineral Density Result Letter and Bone Health Brochure",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Fredric D Wolinsky",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 7749,
      "start_date": "2012-02",
      "completion_date": "2015-11",
      "has_results": true,
      "last_update_posted_date": "2020-11-10",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 3,
      "location_summary": "Birmingham, Alabama • Atlanta, Georgia • Iowa City, Iowa",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01507662"
    },
    {
      "nct_id": "NCT04981847",
      "title": "The Dietary Guidelines 3 Diets Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 2 Diabetes"
      ],
      "interventions": [
        {
          "name": "Dietary Intervention Meetings",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 63,
      "start_date": "2021-08-01",
      "completion_date": "2025-06-23",
      "has_results": true,
      "last_update_posted_date": "2026-06-15",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 1,
      "location_summary": "Columbia, South Carolina",
      "locations": [
        {
          "city": "Columbia",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04981847"
    },
    {
      "nct_id": "NCT00511017",
      "title": "Doxercalciferol in Recurrent Pediatric Solid Tumors",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Solid Tumors"
      ],
      "interventions": [
        {
          "name": "Doxercalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "26 Years",
        "sex": "ALL",
        "summary": "2 Years to 26 Years"
      },
      "enrollment_count": 1,
      "start_date": "2007-08",
      "completion_date": "2010-09",
      "has_results": false,
      "last_update_posted_date": "2012-07-31",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00511017"
    },
    {
      "nct_id": "NCT01363115",
      "title": "Calcium Supplementation for a Healthy Weight (CaSHeW)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Overweight"
      ],
      "interventions": [
        {
          "name": "Orange Juice fortified with Calcium and Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Orange juice without Ca or VitD",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Nutritional Counseling",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 130,
      "start_date": "2005-07",
      "completion_date": "2006-12",
      "has_results": false,
      "last_update_posted_date": "2011-06-01",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01363115"
    },
    {
      "nct_id": "NCT01473602",
      "title": "Second Study of the Effect of Teriparatide on Hip Fracture Healing",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Femur Neck Fracture"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium supplementation",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D supplementation",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 39,
      "start_date": "2012-01",
      "completion_date": "2013-11",
      "has_results": true,
      "last_update_posted_date": "2015-04-16",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 19,
      "location_summary": "San Diego, California • Golden, Colorado • Washington D.C., District of Columbia + 16 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Golden",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Gainesville",
          "state": "Georgia"
        },
        {
          "city": "Morton Grove",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01473602"
    },
    {
      "nct_id": "NCT01119131",
      "title": "Effects of Vitamin D in Parkinson's Disease (PD)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson Disease",
        "Accidental Falls"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "calcium",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "50 Years to 99 Years"
      },
      "enrollment_count": 101,
      "start_date": "2011-05",
      "completion_date": "2015-01",
      "has_results": true,
      "last_update_posted_date": "2016-03-07",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01119131"
    },
    {
      "nct_id": "NCT02186600",
      "title": "Heartland Osteoporosis Prevention Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Osteopenia"
      ],
      "interventions": [
        {
          "name": "Calcium Carbonate",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Risedronate",
          "type": "DRUG"
        },
        {
          "name": "Bone-loading exercises",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "19 Years and older · Female only"
      },
      "enrollment_count": 276,
      "start_date": "2015-02-01",
      "completion_date": "2019-06-01",
      "has_results": true,
      "last_update_posted_date": "2023-10-05",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02186600"
    },
    {
      "nct_id": "NCT00486512",
      "title": "Chemoprevention of Colorectal Adenomas",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Adenomatous Polyps"
      ],
      "interventions": [
        {
          "name": "0.5 mg calcitriol (1a -25-dihydroxycholecalciferol)",
          "type": "DRUG"
        },
        {
          "name": "75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3)",
          "type": "DRUG"
        },
        {
          "name": "placebo to 0.5 mg calcitriol (1a -25-dihydroxycholecalciferol)",
          "type": "DRUG"
        },
        {
          "name": "placebo to 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3)",
          "type": "DRUG"
        },
        {
          "name": "Colonoscopy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Colotech A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "40 Years to 75 Years"
      },
      "enrollment_count": 350,
      "start_date": "2007-06",
      "completion_date": "2010-11",
      "has_results": false,
      "last_update_posted_date": "2020-09-03",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 24,
      "location_summary": "Huntsville, Alabama • San Diego, California • Clearwater, Florida + 20 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Clearwater",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Decatur",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00486512"
    },
    {
      "nct_id": "NCT00567606",
      "title": "Prevention of Osteoporosis in Breast Cancer Survivors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postmenopausal Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Strength/Weight Training & Drug/Supplement",
          "type": "OTHER"
        },
        {
          "name": "Drug/Supplement only",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "OTHER",
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "35 Years to 75 Years · Female only"
      },
      "enrollment_count": 249,
      "start_date": "2002-04-01",
      "completion_date": "2007-12-01",
      "has_results": false,
      "last_update_posted_date": "2023-11-30",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 4,
      "location_summary": "Kearney, Nebraska • Lincoln, Nebraska • Omaha, Nebraska + 1 more",
      "locations": [
        {
          "city": "Kearney",
          "state": "Nebraska"
        },
        {
          "city": "Lincoln",
          "state": "Nebraska"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        },
        {
          "city": "Scottsbluff",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00567606"
    },
    {
      "nct_id": "NCT00073073",
      "title": "Exemestane and Celecoxib in Postmenopausal Women at High Risk for Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Neoplasms"
      ],
      "interventions": [
        {
          "name": "Exemestane",
          "type": "DRUG"
        },
        {
          "name": "Calcium carbonate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Georgetown University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 46,
      "start_date": "2003-11",
      "completion_date": "2011-12",
      "has_results": true,
      "last_update_posted_date": "2016-05-17",
      "last_synced_at": "2026-10-07T19:24:10.808Z",
      "location_count": 2,
      "location_summary": "Washington D.C., District of Columbia • Bethesda, Maryland",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00073073"
    }
  ]
}