{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=D3+4000+IU%2Fday&page=2",
    "query": {
      "intervention": "D3 4000 IU/day",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 40,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=D3+4000+IU%2Fday&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=D3+4000+IU%2Fday&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-04T20:44:18.820Z",
  "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": "NCT01516216",
      "title": "Study of Vitamin D in Untreated Metastatic Colorectal Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Colorectal Cancer"
      ],
      "interventions": [
        {
          "name": "FOLFOX + bevacizumab",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Dana-Farber Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 139,
      "start_date": "2012-04-13",
      "completion_date": "2019-11-09",
      "has_results": true,
      "last_update_posted_date": "2022-04-26",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 18,
      "location_summary": "Boise, Idaho • Fruitland, Idaho • Meridian, Idaho + 13 more",
      "locations": [
        {
          "city": "Boise",
          "state": "Idaho"
        },
        {
          "city": "Fruitland",
          "state": "Idaho"
        },
        {
          "city": "Meridian",
          "state": "Idaho"
        },
        {
          "city": "Nampa",
          "state": "Idaho"
        },
        {
          "city": "Twin Falls",
          "state": "Idaho"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01516216"
    },
    {
      "nct_id": "NCT03115775",
      "title": "CLA and Vitamin D on Protein Turnover",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Protein"
      ],
      "interventions": [
        {
          "name": "Conjugated linoleic acid",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Conjugated linoleic acid and Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Corn oil (placebo)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "65 Years to 85 Years"
      },
      "enrollment_count": 40,
      "start_date": "2017-05-12",
      "completion_date": "2019-08-31",
      "has_results": false,
      "last_update_posted_date": "2019-11-21",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03115775"
    },
    {
      "nct_id": "NCT05165173",
      "title": "Almond Milk With Vitamin D: Impact on Vitamin D Status",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Renal Insufficiency, Chronic",
        "Kidney Failure, Chronic"
      ],
      "interventions": [
        {
          "name": "NanoD4CKD",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "MicroD4CKD",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 21,
      "start_date": "2023-05-22",
      "completion_date": "2023-11-18",
      "has_results": false,
      "last_update_posted_date": "2024-06-10",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05165173"
    },
    {
      "nct_id": "NCT00710021",
      "title": "Vitamin D3 in Systemic Lupus Erythematosus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Systemic Lupus Erythematosus",
        "SLE",
        "Lupus"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 57,
      "start_date": "2008-11",
      "completion_date": "2011-07",
      "has_results": true,
      "last_update_posted_date": "2017-04-26",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 8,
      "location_summary": "Birmingham, Alabama • San Francisco, California • Boston, Massachusetts + 5 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Manhassett",
          "state": "New York"
        },
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00710021"
    },
    {
      "nct_id": "NCT01575717",
      "title": "The Effect of Vitamin D Repletion in Patients With Hepatocellular Carcinoma on the Orthotopic Liver Transplant List",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Hepatocellular Carcinoma"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 4000 IU",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 2000 IU",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Andrea Branch",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2012-01",
      "completion_date": "2013-01",
      "has_results": false,
      "last_update_posted_date": "2012-10-24",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01575717"
    },
    {
      "nct_id": "NCT01498406",
      "title": "Vitamin D Status, Disease Specific and Quality of Life Outcomes in Patients With Cutaneous Lupus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cutaneous Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3,
      "start_date": "2011-12",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2013-11-20",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01498406"
    },
    {
      "nct_id": "NCT01554241",
      "title": "Optimizing Vitamin D in the Elderly",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Deficiency of Vitamin D3"
      ],
      "interventions": [
        {
          "name": "D3 2000 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "D3 4000 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "D3 50,000 IU weekly",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "vitamin D3 800 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 86,
      "start_date": "2012-09",
      "completion_date": "2014-09",
      "has_results": true,
      "last_update_posted_date": "2015-02-18",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01554241"
    },
    {
      "nct_id": "NCT02099955",
      "title": "Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Spinal Cord Injury",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "James J. Peters Veterans Affairs Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 88,
      "start_date": "2012-01",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2017-03-07",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02099955"
    },
    {
      "nct_id": "NCT00920621",
      "title": "Randomized Trial: Maternal Vitamin D Supplementation to Prevent Childhood Asthma (VDAART)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Vitamin D 3 cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "39 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 39 Years · Female only"
      },
      "enrollment_count": 876,
      "start_date": "2009-09",
      "completion_date": "2023-08",
      "has_results": true,
      "last_update_posted_date": "2026-05-12",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 3,
      "location_summary": "San Diego, California • Boston, Massachusetts • St Louis, Missouri",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00920621"
    },
    {
      "nct_id": "NCT00418587",
      "title": "Vitamin D Therapy in Patients With Systemic Lupus Erythematosus (SLE)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Systemic Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Medical University of South Carolina",
      "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": 18,
      "start_date": "2006-12",
      "completion_date": "2014-08",
      "has_results": false,
      "last_update_posted_date": "2018-06-18",
      "last_synced_at": "2026-10-04T20:44:18.820Z",
      "location_count": 1,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00418587"
    }
  ]
}