{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+%28cholecalciferol%29%2C+2000+IU+per+day&page=3",
    "query": {
      "intervention": "Vitamin D3 (cholecalciferol), 2000 IU per day",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 53,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+%28cholecalciferol%29%2C+2000+IU+per+day&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+%28cholecalciferol%29%2C+2000+IU+per+day&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-11T12:09:59.345Z",
  "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": "NCT01351805",
      "title": "Vitamin D and Fish Oil for Autoimmune Disease, Inflammation and Knee Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Autoimmune Diseases",
        "Systemic Inflammatory Process",
        "Knee Pain Chronic",
        "Osteoarthritis",
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "Fish Oil",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo pill",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "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": 25871,
      "start_date": "2010-07",
      "completion_date": "2025-02",
      "has_results": true,
      "last_update_posted_date": "2025-12-03",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01351805"
    },
    {
      "nct_id": "NCT00412087",
      "title": "Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Pregnancy"
      ],
      "interventions": [
        {
          "name": "cholecalciferol (vitamin D3)",
          "type": "DRUG"
        },
        {
          "name": "cholecalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 45 Years · Female only"
      },
      "enrollment_count": 564,
      "start_date": "2007-01",
      "completion_date": "2009-07",
      "has_results": true,
      "last_update_posted_date": "2016-07-29",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Columbia, South Carolina",
      "locations": [
        {
          "city": "Columbia",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00412087"
    },
    {
      "nct_id": "NCT05018585",
      "title": "A Phase III Study to Investigate if the Study Drug Diamyd Can Preserve Insulin Production and Improve Glycemic Control in Patients Newly Diagnosed With Type 1 Diabetes",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Type 1 Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "Recombinant human glutamic acid decarboxylase (rhGAD65) formulated in Alhydrogel®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Colecalciferol 2000 IU",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Diamyd Medical AB",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "28 Years",
        "sex": "ALL",
        "summary": "12 Years to 28 Years"
      },
      "enrollment_count": 321,
      "start_date": "2022-05-19",
      "completion_date": "2026-06-24",
      "has_results": false,
      "last_update_posted_date": "2026-08-26",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 13,
      "location_summary": "Newport Beach, California • Palo Alto, California • San Diego, California + 10 more",
      "locations": [
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05018585"
    },
    {
      "nct_id": "NCT01782352",
      "title": "Age-related Macular Degeneration (AMD) in the Vitamin D and Omega-3 Trial (VITAL)",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Age-related Macular Degeneration"
      ],
      "interventions": [
        {
          "name": "Omega-3 fatty acids (fish oil)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3 placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Fish oil placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "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": 25871,
      "start_date": "2010-07",
      "completion_date": "2024-09",
      "has_results": true,
      "last_update_posted_date": "2023-08-08",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01782352"
    },
    {
      "nct_id": "NCT01704859",
      "title": "VITamin D and OmegA-3 TriaL (VITAL): Fractures, Vitamin D and Genetic Markers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Fractures"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Fish oil placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "omega-3 fatty acids (fish oil)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "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": 25871,
      "start_date": "2018-06-01",
      "completion_date": "2022-11-23",
      "has_results": false,
      "last_update_posted_date": "2026-04-27",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01704859"
    },
    {
      "nct_id": "NCT01909063",
      "title": "A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Hypovitaminosis A",
        "Vitamin E Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D, Vitamin E, and Vitamin A",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Control, 700 mg Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Boston University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "10 Years",
        "sex": "ALL",
        "summary": "6 Years to 10 Years"
      },
      "enrollment_count": 180,
      "start_date": "2005-01",
      "completion_date": "2008-01",
      "has_results": false,
      "last_update_posted_date": "2017-02-28",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01909063"
    },
    {
      "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": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02178410"
    },
    {
      "nct_id": "NCT01630213",
      "title": "Impact of Vitamin D Supplementation on Cardiac Structure and Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 + fish oil/fish oil placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3 placebo + fish oil/fish oil placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 1025,
      "start_date": "2010-07-01",
      "completion_date": "2021-06-30",
      "has_results": false,
      "last_update_posted_date": "2022-04-06",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01630213"
    },
    {
      "nct_id": "NCT00292591",
      "title": "Evaluation of Vitamin D Requirements During Pregnancy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "cholecalciferol (vitamin D3)",
          "type": "DRUG"
        },
        {
          "name": "cholecalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 45 Years · Female only"
      },
      "enrollment_count": 501,
      "start_date": "2004-01",
      "completion_date": "2010-01",
      "has_results": true,
      "last_update_posted_date": "2016-09-19",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00292591"
    },
    {
      "nct_id": "NCT05869812",
      "title": "Influence of β-hydroxy β-methyl Butyrate (HMB)Supplementation on Post-operative Muscle Mass and Function in Female Athletes",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Atrophy"
      ],
      "interventions": [
        {
          "name": "CaHMB (Dietary supplement, not Drug)",
          "type": "DRUG"
        },
        {
          "name": "CaLa",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 30,
      "start_date": "2023-05-29",
      "completion_date": "2029-12",
      "has_results": false,
      "last_update_posted_date": "2026-03-02",
      "last_synced_at": "2026-10-11T12:09:59.345Z",
      "location_count": 1,
      "location_summary": "Overland Park, Kansas",
      "locations": [
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05869812"
    }
  ]
}