{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+2000+IU&page=2",
    "query": {
      "intervention": "Vitamin D3 2000 IU",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 91,
    "total_pages": 10,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+2000+IU&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+2000+IU&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-05T21:45:34.720Z",
  "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": "NCT00909454",
      "title": "Vitamin D Supplement Study for Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "2000 IU Vitamin D3 daily supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "400 IU Vitamin D3 supplement",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Augusta University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "14 Years to 19 Years"
      },
      "enrollment_count": 45,
      "start_date": "2009-02",
      "completion_date": "2009-06",
      "has_results": false,
      "last_update_posted_date": "2011-10-17",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00909454"
    },
    {
      "nct_id": "NCT01004354",
      "title": "Vitamin D Supplementation in Psychiatric Illnesses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Vitamin D Deficiency",
        "Psychosis",
        "Schizophrenia",
        "Schizoaffective Disorder"
      ],
      "interventions": [
        {
          "name": "Ergocalciferols",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "10 Years to 18 Years"
      },
      "enrollment_count": 12,
      "start_date": "2009-06",
      "completion_date": "2010-06",
      "has_results": true,
      "last_update_posted_date": "2017-11-06",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01004354"
    },
    {
      "nct_id": "NCT03078855",
      "title": "A Study to Evaluate the Effect of Vitamin D on PFS in Indolent Non-Hodgkin's Lymphoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Follicular Lymphoma",
        "Small Lymphocytic Lymphoma",
        "Marginal Zone Lymphoma",
        "Mucosal-Associated Lymphoid Tissue Lymphoma"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Rituximab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Jonathan Friedberg",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 211,
      "start_date": "2017-09-07",
      "completion_date": "2024-07-02",
      "has_results": true,
      "last_update_posted_date": "2024-09-04",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 7,
      "location_summary": "Miami, Florida • Atlanta, Georgia • Iowa City, Iowa + 4 more",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03078855"
    },
    {
      "nct_id": "NCT01921894",
      "title": "Vitamin D and Severe Asthma Exacerbations",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "14 Years",
        "sex": "ALL",
        "summary": "6 Years to 14 Years"
      },
      "enrollment_count": 48,
      "start_date": "2013-08",
      "completion_date": "2015-01",
      "has_results": true,
      "last_update_posted_date": "2017-03-23",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01921894"
    },
    {
      "nct_id": "NCT01465178",
      "title": "Improving the Understanding of the Response to Vitamin D Supplementation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "100 Years",
        "sex": "FEMALE",
        "summary": "50 Years to 100 Years · Female only"
      },
      "enrollment_count": 62,
      "start_date": "2011-12",
      "completion_date": "2014-12",
      "has_results": true,
      "last_update_posted_date": "2016-11-25",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01465178"
    },
    {
      "nct_id": "NCT00552409",
      "title": "Randomized Controlled Trial of Vitamin D3 in Diabetic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Diabetes Mellitus",
        "Chronic Kidney Disease",
        "Diabetic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 22,
      "start_date": "2007-12",
      "completion_date": "2010-06",
      "has_results": true,
      "last_update_posted_date": "2014-04-28",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00552409"
    },
    {
      "nct_id": "NCT02178410",
      "title": "VITAL Rhythm Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Omega-3 fatty acids (fish oil)",
          "type": "DRUG"
        },
        {
          "name": "Fish oil placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3 placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 25119,
      "start_date": "2012-10",
      "completion_date": "2026-10",
      "has_results": false,
      "last_update_posted_date": "2025-10-07",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02178410"
    },
    {
      "nct_id": "NCT04386577",
      "title": "Effects of Vitamin D and Omega-3 Supplementation on Telomeres in VITAL",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Aging"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 (cholecalciferol)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "fish oil",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Augusta University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 1054,
      "start_date": "2016-08-19",
      "completion_date": "2021-04-30",
      "has_results": false,
      "last_update_posted_date": "2020-05-13",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04386577"
    },
    {
      "nct_id": "NCT01835639",
      "title": "Vitamin D Supplementation in Glomerular Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Glomerular Disease"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol, 2000 or 4000 IUs by mouth daily for 12 weeks",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Children's Hospital of Philadelphia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "5 Years to 30 Years"
      },
      "enrollment_count": 32,
      "start_date": "2013-04",
      "completion_date": "2017-09",
      "has_results": false,
      "last_update_posted_date": "2019-08-12",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 5,
      "location_summary": "Wilmington, Delaware • Baltimore, Maryland • New Hyde Park, New York + 1 more",
      "locations": [
        {
          "city": "Wilmington",
          "state": "Delaware"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "New Hyde Park",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01835639"
    },
    {
      "nct_id": "NCT00857831",
      "title": "Vitamin D and Calcium Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spinal Cord Injury"
      ],
      "interventions": [
        {
          "name": "Vitamin D and Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "US Department of Veterans Affairs",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 10,
      "start_date": "2008-01",
      "completion_date": "2012-08",
      "has_results": false,
      "last_update_posted_date": "2012-10-03",
      "last_synced_at": "2026-10-05T21:45:34.720Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00857831"
    }
  ]
}