{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=cholecalciferol+%28vitamin+D%29&page=19",
    "query": {
      "intervention": "cholecalciferol (vitamin D)",
      "page": 19
    },
    "page_size": 10
  },
  "pagination": {
    "page": 19,
    "page_size": 10,
    "total_count": 960,
    "total_pages": 96,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=cholecalciferol+%28vitamin+D%29&page=20&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=cholecalciferol+%28vitamin+D%29&page=18&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-15T18:15:55.002Z",
  "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": "NCT01419730",
      "title": "Vitamin D and Physical Activity on Bone Health",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Bone Metabolism Biomarkers",
        "Bone Mineral Density",
        "Physical Fitness"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Physical Activity",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 99 Years · Female only"
      },
      "enrollment_count": 191,
      "start_date": "2011-08",
      "completion_date": "2026-12-30",
      "has_results": true,
      "last_update_posted_date": "2026-08-05",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01419730"
    },
    {
      "nct_id": "NCT00356512",
      "title": "Physiologic Regulation of FGF-23",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypoparathyroidism"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Dental and Craniofacial Research (NIDCR)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2006-07-19",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00356512"
    },
    {
      "nct_id": "NCT01173081",
      "title": "The Use of Teriparatide as an Adjunctive Therapy for the Treatment of Jones Fractures",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Fractures"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ohio Orthopedic Center of Excellence",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 38,
      "start_date": "2010-07",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2012-06-05",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Upper Arlington, Ohio",
      "locations": [
        {
          "city": "Upper Arlington",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01173081"
    },
    {
      "nct_id": "NCT02822378",
      "title": "Dried Plums and Bone Health in Postmenopausal Women",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postmenopausal Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Dried Plum",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D supplement",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Penn State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "55 Years to 75 Years · Female only"
      },
      "enrollment_count": 322,
      "start_date": "2016-06-01",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-06",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "University Park, Pennsylvania",
      "locations": [
        {
          "city": "University Park",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02822378"
    },
    {
      "nct_id": "NCT02686905",
      "title": "Vitamin Supplementation After Bariatric Surgery",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Complications of Bariatric Procedures",
        "Avitaminosis"
      ],
      "interventions": [
        {
          "name": "Chewable Multivitamin with Iron",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PatchMD Vitamin D3/Calcium Patch",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PatchMD Multivitamin Patch",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PatchMD B12 Energy Plus Patch",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Chewable Calcium",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Quick Dissolve B12",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "California State Polytechnic University, Pomona",
      "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": 30,
      "start_date": "2016-01",
      "completion_date": "2017-06",
      "has_results": false,
      "last_update_posted_date": "2016-09-30",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Brea, California",
      "locations": [
        {
          "city": "Brea",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02686905"
    },
    {
      "nct_id": "NCT02166333",
      "title": "Study To Understand Fall Reduction and Vitamin D in You",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Falls"
      ],
      "interventions": [
        {
          "name": "200 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "1000 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "2000 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "4000 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "70 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "70 Years and older"
      },
      "enrollment_count": 688,
      "start_date": "2015-06-30",
      "completion_date": "2019-06-07",
      "has_results": true,
      "last_update_posted_date": "2021-05-14",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland • Hagerstown, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Hagerstown",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02166333"
    },
    {
      "nct_id": "NCT01008384",
      "title": "The Effect of Vitamin D Repletion on Small Low Density Lipoprotein (LDL) Particle Number in Subjects at Elevated Cardiovascular Risk",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atherosclerosis"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Rockefeller University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 150,
      "start_date": "2009-10",
      "completion_date": "2011-10",
      "has_results": false,
      "last_update_posted_date": "2012-06-01",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01008384"
    },
    {
      "nct_id": "NCT01691833",
      "title": "The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypovitaminosis D"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "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": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 113,
      "start_date": "2011-02",
      "completion_date": "2017-12",
      "has_results": true,
      "last_update_posted_date": "2022-07-14",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01691833"
    },
    {
      "nct_id": "NCT02595489",
      "title": "A Pilot Study of Vitamin D in Boys With X-linked Adrenoleukodystrophy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "X-linked Adrenoleukodystrophy"
      ],
      "interventions": [
        {
          "name": "vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Months",
        "maximum_age": "25 Years",
        "sex": "MALE",
        "summary": "18 Months to 25 Years · Male only"
      },
      "enrollment_count": 21,
      "start_date": "2016-11-21",
      "completion_date": "2020-06-30",
      "has_results": false,
      "last_update_posted_date": "2022-06-09",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Palo Alto, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02595489"
    },
    {
      "nct_id": "NCT02186535",
      "title": "The Role of Vitamin D in Female Reproductive Tract Immunity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D and Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "CONRAD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 50 Years · Female only"
      },
      "enrollment_count": 22,
      "start_date": "2014-08",
      "completion_date": "2015-07",
      "has_results": false,
      "last_update_posted_date": "2016-01-08",
      "last_synced_at": "2026-10-15T18:15:55.002Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02186535"
    }
  ]
}