{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcifediol",
    "query": {
      "intervention": "Calcifediol"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 41,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcifediol&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-08T04:58:44.362Z",
  "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": "NCT05845021",
      "title": "Surgeon-Initiated Bone Health Referral Pathway in Patients Undergoing Lower Extremity Arthroplasty",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteoporosis",
        "Arthroplasty Complications",
        "Fragility Fracture"
      ],
      "interventions": [
        {
          "name": "Surgeon-Initiated Bone Health Referral Pathway",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 2000,
      "start_date": "2023-09-27",
      "completion_date": "2028-07",
      "has_results": false,
      "last_update_posted_date": "2025-10-14",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "Columbia, Maryland",
      "locations": [
        {
          "city": "Columbia",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05845021"
    },
    {
      "nct_id": "NCT01041365",
      "title": "Vitamin D, Insulin Sensitivity, and Vascular Associations in Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Insulin Sensitivity",
        "Flow-mediated Dilation",
        "Arterial Stiffness"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "18 Years",
        "sex": "FEMALE",
        "summary": "14 Years to 18 Years · Female only"
      },
      "enrollment_count": 62,
      "start_date": "2009-12",
      "completion_date": "2013-12",
      "has_results": false,
      "last_update_posted_date": "2014-01-14",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01041365"
    },
    {
      "nct_id": "NCT00411294",
      "title": "Ergocalciferol in Chronic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Saint Louis VA Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": null,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2006-12-13",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00411294"
    },
    {
      "nct_id": "NCT04780776",
      "title": "Evaluating the Effect of SOLIUS UV Light Source in Improving Vitamin D Status",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Vitamin D Insufficiency"
      ],
      "interventions": [
        {
          "name": "UVB treatment",
          "type": "DEVICE"
        },
        {
          "name": "Sham comparator",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Boston University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "22 Years and older"
      },
      "enrollment_count": 69,
      "start_date": "2022-02-23",
      "completion_date": "2023-11-02",
      "has_results": true,
      "last_update_posted_date": "2024-10-22",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04780776"
    },
    {
      "nct_id": "NCT01199926",
      "title": "Effect of Vitamin D Supplementation on Muscle Mass and Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity",
        "Insulin Resistance",
        "Inflammation"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Purdue University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 34,
      "start_date": "2008-08",
      "completion_date": "2010-02",
      "has_results": true,
      "last_update_posted_date": "2015-05-15",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "West Lafayette, Indiana",
      "locations": [
        {
          "city": "West Lafayette",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01199926"
    },
    {
      "nct_id": "NCT02293187",
      "title": "Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Sarcopenia"
      ],
      "interventions": [
        {
          "name": "vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Tufts University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "60 Years to 85 Years"
      },
      "enrollment_count": 100,
      "start_date": "2015-03-23",
      "completion_date": "2018-12-31",
      "has_results": false,
      "last_update_posted_date": "2019-03-21",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02293187"
    },
    {
      "nct_id": "NCT03104855",
      "title": "Clearance of 25-hydroxyvitamin D in Cystic Fibrosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cystic Fibrosis"
      ],
      "interventions": [
        {
          "name": "d6-25-hydroxyvitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2017-04-03",
      "completion_date": "2023-09-06",
      "has_results": true,
      "last_update_posted_date": "2023-10-12",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03104855"
    },
    {
      "nct_id": "NCT02920502",
      "title": "Effect of a One Time Dose of Cholecalciferol on Serum Concentration of 25-Hydroxyvitamin D and Macrophages",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Inflammation"
      ],
      "interventions": [
        {
          "name": "Arm 2: cholecalciferol 50,000 IU",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Arm 3: cholecalciferol 100,000 IU",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Arm 4: cholecalciferol 200,000 IU",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Arm 1: Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University Hospitals Cleveland Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 24,
      "start_date": "2013-06",
      "completion_date": "2015-08",
      "has_results": false,
      "last_update_posted_date": "2016-10-10",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02920502"
    },
    {
      "nct_id": "NCT01312441",
      "title": "Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Renal Failure Chronic Requiring Hemodialysis"
      ],
      "interventions": [
        {
          "name": "Ergocalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Albany College of Pharmacy and 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": 20,
      "start_date": "2011-01",
      "completion_date": "2015-08",
      "has_results": false,
      "last_update_posted_date": "2016-01-14",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 4,
      "location_summary": "Albany, New York • Clifton Park, New York • Saratoga Springs, New York + 1 more",
      "locations": [
        {
          "city": "Albany",
          "state": "New York"
        },
        {
          "city": "Clifton Park",
          "state": "New York"
        },
        {
          "city": "Saratoga Springs",
          "state": "New York"
        },
        {
          "city": "Troy",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01312441"
    },
    {
      "nct_id": "NCT03602261",
      "title": "Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism Due to Renal Causes",
        "Chronic Kidney Diseases",
        "Vitamin D Deficiency",
        "Stage 5 Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Calcifediol Oral Capsule",
          "type": "DRUG"
        },
        {
          "name": "Placebo oral capsule",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "OPKO Health, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 44,
      "start_date": "2018-07-09",
      "completion_date": "2021-02-24",
      "has_results": true,
      "last_update_posted_date": "2026-04-03",
      "last_synced_at": "2026-09-08T04:58:44.362Z",
      "location_count": 18,
      "location_summary": "Peoria, Arizona • Phoenix, Arizona • Cypress, California + 13 more",
      "locations": [
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Cypress",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03602261"
    }
  ]
}