{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+D3+%28cholecalciferol%29",
    "query": {
      "intervention": "vitamin D3 (cholecalciferol)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 959,
    "total_pages": 96,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+D3+%28cholecalciferol%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-09T06:58:02.519Z",
  "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": "NCT00698984",
      "title": "Investigation of the Effect of BONISTEIN(R) Bone Blend on Bone Mineral Density/Content and Biomarkers of Bone Health",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "BONISTEIN(R) bone blend",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "dsm-firmenich Switzerland AG",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "55 Years",
        "sex": "FEMALE",
        "summary": "45 Years to 55 Years · Female only"
      },
      "enrollment_count": 70,
      "start_date": "2007-01",
      "completion_date": "2009-01",
      "has_results": false,
      "last_update_posted_date": "2009-01-16",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00698984"
    },
    {
      "nct_id": "NCT01875458",
      "title": "Biomarker Identification in Orthopaedic & Oral Maxillofacial Surgery Subjects to Identify Risks of Bisphosphonate Use",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Osteoporosis, With or Without Treatment",
        "Bisphosphonate Treatment",
        "Atypical Femur Fracture",
        "Bisphosphonate Related Osteonecrosis of the Jaws (BRONJ)",
        "Healthy Volunteers"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 314,
      "start_date": "2012-04-13",
      "completion_date": "2022-10-30",
      "has_results": false,
      "last_update_posted_date": "2023-01-13",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01875458"
    },
    {
      "nct_id": "NCT00749736",
      "title": "The Role of Vitamin D in Immune Function in Patients With Chronic Kidney Disease (CKD) Stages 3 and 4.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "doxercalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2008-07",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2013-03-29",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00749736"
    },
    {
      "nct_id": "NCT02996721",
      "title": "A Trial Evaluating Vitamin D Normalization on Major Adverse Cardiovascular-Related Events Among Myocardial Infarction Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Death",
        "Myocardial Infarction",
        "Cerebral Vascular Accident",
        "Heart Failure Hospitalization"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Intermountain Health Care, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 634,
      "start_date": "2017-04-03",
      "completion_date": "2025-09-04",
      "has_results": false,
      "last_update_posted_date": "2025-12-17",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Murray, Utah",
      "locations": [
        {
          "city": "Murray",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02996721"
    },
    {
      "nct_id": "NCT01198548",
      "title": "High-Dose Cholecalciferol in Treating Patients Receiving Combination Chemotherapy and Bevacizumab as First-Line Therapy For Metastatic Colorectal Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Stage IV Colon Cancer",
        "Stage IV Rectal Cancer"
      ],
      "interventions": [
        {
          "name": "leucovorin calcium",
          "type": "DRUG"
        },
        {
          "name": "bevacizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "fluorouracil",
          "type": "DRUG"
        },
        {
          "name": "oxaliplatin",
          "type": "DRUG"
        },
        {
          "name": "pharmacological study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL",
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Roswell Park Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "18 Years to 79 Years"
      },
      "enrollment_count": 10,
      "start_date": "2010-08",
      "completion_date": "2012-06",
      "has_results": true,
      "last_update_posted_date": "2014-07-21",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01198548"
    },
    {
      "nct_id": "NCT00794547",
      "title": "Phase I/II Calcitriol in Lung Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Non Small Cell Lung Cancer"
      ],
      "interventions": [
        {
          "name": "Calcitriol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Michigan Rogel Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 34,
      "start_date": "2008-12",
      "completion_date": "2013-08",
      "has_results": true,
      "last_update_posted_date": "2017-12-12",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 4,
      "location_summary": "Ann Arbor, Michigan • Buffalo, New York",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00794547"
    },
    {
      "nct_id": "NCT01633658",
      "title": "The Variability of 25-hydroxyvitamin D Response From Crystalline 25-hydroxyvitamin D3",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "25(OH)D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Creighton University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "20 Years to 60 Years"
      },
      "enrollment_count": 0,
      "start_date": "2012-11",
      "completion_date": "2013-11",
      "has_results": false,
      "last_update_posted_date": "2013-05-29",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01633658"
    },
    {
      "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": "2026-10-09T06:58:02.519Z",
      "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": "NCT04489628",
      "title": "Tele-health Enabled Clinical Trial for COVID-19",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "SARS-CoV Infection"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 or Placebo",
          "type": "DRUG"
        },
        {
          "name": "Doctella telehealth monitoring",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "University Hospitals Cleveland Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2020-08-01",
      "completion_date": "2021-06-01",
      "has_results": false,
      "last_update_posted_date": "2022-02-07",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04489628"
    },
    {
      "nct_id": "NCT01052051",
      "title": "Clinical Trial of Vitamin D3 to Reduce Cancer Risk in Postmenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Cancer"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium carbonate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Creighton University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "55 Years and older · Female only"
      },
      "enrollment_count": 2303,
      "start_date": "2009-06",
      "completion_date": "2015-08",
      "has_results": false,
      "last_update_posted_date": "2019-07-24",
      "last_synced_at": "2026-10-09T06:58:02.519Z",
      "location_count": 1,
      "location_summary": "Fremont, Nebraska",
      "locations": [
        {
          "city": "Fremont",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01052051"
    }
  ]
}