{
  "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": "2026-10-06T17:09:23.127Z",
  "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": "NCT01465113",
      "title": "Vitamin D Supplementation on 15-Prostaglandin Dehydrogenase Expression in Barrett's Esophagus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Short Segment Barrett's Esophagus",
        "Long Segment Barrett's Esophagus"
      ],
      "interventions": [
        {
          "name": "Omeprazole",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "upper endoscopy",
          "type": "PROCEDURE"
        },
        {
          "name": "Metformin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Case Comprehensive 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": 26,
      "start_date": "2010-05",
      "completion_date": "2016-02",
      "has_results": false,
      "last_update_posted_date": "2016-03-10",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 3,
      "location_summary": "Beachwood, Ohio • Cleveland, Ohio",
      "locations": [
        {
          "city": "Beachwood",
          "state": "Ohio"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01465113"
    },
    {
      "nct_id": "NCT04431960",
      "title": "Blackcurrants Modify Gut Microbiota and Reduce Osteoporosis and CVD Risk",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Postmenopausal Osteoporosis",
        "Gut Microbiota",
        "Cardiovascular Diseases"
      ],
      "interventions": [
        {
          "name": "blackcurrant (BC) extract",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Connecticut",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "45 Years to 60 Years · Female only"
      },
      "enrollment_count": 51,
      "start_date": "2021-07-20",
      "completion_date": "2022-10-03",
      "has_results": true,
      "last_update_posted_date": "2025-08-12",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Storrs, Connecticut",
      "locations": [
        {
          "city": "Storrs",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04431960"
    },
    {
      "nct_id": "NCT02856776",
      "title": "Gene Expression, Metabolomic, Microbiome, and Calcium Metabolism in Response to Varied Vitamin D Dosages",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Insufficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Boston University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 39,
      "start_date": "2017-12-01",
      "completion_date": "2018-08-06",
      "has_results": false,
      "last_update_posted_date": "2019-07-18",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02856776"
    },
    {
      "nct_id": "NCT01153568",
      "title": "Vitamin D and Osteoporosis Prevention in Elderly African American Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Determine Effect of Vitamin D on Bone Health in Elderly African American Women"
      ],
      "interventions": [
        {
          "name": "Vitamin D 3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Winthrop University Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "60 Years and older · Female only"
      },
      "enrollment_count": 260,
      "start_date": "2010-08",
      "completion_date": "2016-10",
      "has_results": false,
      "last_update_posted_date": "2018-10-03",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Mineola, New York",
      "locations": [
        {
          "city": "Mineola",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01153568"
    },
    {
      "nct_id": "NCT00511225",
      "title": "Effects of Oral Cholecalciferol (Vitamin D3) on Bone Health, Neuromuscular Function, and Quality of Life in Adults With Chronic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "End Stage Renal Disease"
      ],
      "interventions": [
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Creighton University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 47,
      "start_date": "2007-09",
      "completion_date": "2011-09",
      "has_results": false,
      "last_update_posted_date": "2012-07-03",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00511225"
    },
    {
      "nct_id": "NCT00763555",
      "title": "Efficacy and Safety Study of CD 2027 Spray in Subjects With Plaque-type Psoriasis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Psoriasis"
      ],
      "interventions": [
        {
          "name": "CD 2027",
          "type": "DRUG"
        },
        {
          "name": "Calcitriol Vehicle",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Galderma R&D",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 88,
      "start_date": "2008-09",
      "completion_date": "2009-03",
      "has_results": true,
      "last_update_posted_date": "2022-08-23",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 2,
      "location_summary": "Fridley, Minnesota • Nashville, Tennessee",
      "locations": [
        {
          "city": "Fridley",
          "state": "Minnesota"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00763555"
    },
    {
      "nct_id": "NCT01100723",
      "title": "Trial to Optimize Mineral Outcomes in Dialysis Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism",
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Cinacalcet, active vitamin D analogue",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 92,
      "start_date": "2010-03",
      "completion_date": "2011-08",
      "has_results": true,
      "last_update_posted_date": "2017-01-02",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Lynchburg, Virginia",
      "locations": [
        {
          "city": "Lynchburg",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01100723"
    },
    {
      "nct_id": "NCT00200174",
      "title": "Combined Estrogen Blockade of the Breast With Exemestane and Raloxifene in Postmenopausal Women With a History of Breast Cancer Who Have No Clinical Evidence of Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Raloxifene followed by combination therapy",
          "type": "DRUG"
        },
        {
          "name": "Exemestane followed by combination therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "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": 11,
      "start_date": "1999-07",
      "completion_date": "2008-08",
      "has_results": false,
      "last_update_posted_date": "2023-07-05",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00200174"
    },
    {
      "nct_id": "NCT00670501",
      "title": "Effects of Teriparatide in the Treatment of Postmenopausal Women With Osteoporosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Osteoporosis, Postmenopausal"
      ],
      "interventions": [
        {
          "name": "teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium Supplement",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D Supplement",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "85 Years",
        "sex": "FEMALE",
        "summary": "30 Years to 85 Years · Female only"
      },
      "enrollment_count": 1637,
      "start_date": "1996-08",
      "completion_date": "1999-04",
      "has_results": false,
      "last_update_posted_date": "2008-05-01",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00670501"
    },
    {
      "nct_id": "NCT00073710",
      "title": "Study to Evaluate the Effects of Zemplar Injection and Calcijex on Intestinal Absorption of Calcium",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism",
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Zemplar",
          "type": "DRUG"
        },
        {
          "name": "42 Ca carbonate absorption via single tracer method",
          "type": "PROCEDURE"
        },
        {
          "name": "Calcijex",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Abbott",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "20 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2004-09",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2006-08-02",
      "last_synced_at": "2026-10-06T17:09:23.127Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00073710"
    }
  ]
}