{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+.&page=16",
    "query": {
      "intervention": "Vitamin D3 .",
      "page": 16
    },
    "page_size": 10
  },
  "pagination": {
    "page": 16,
    "page_size": 10,
    "total_count": 967,
    "total_pages": 97,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+.&page=17&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3+.&page=15&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-11-15T14:19:38.482Z",
  "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": "NCT01508845",
      "title": "A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Tufts University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 61,
      "start_date": "2012-01",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2014-07-21",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01508845"
    },
    {
      "nct_id": "NCT02460211",
      "title": "Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiovascular Disease",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Intermountain Health Care, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 150,
      "start_date": "2015-07",
      "completion_date": "2020-10-01",
      "has_results": false,
      "last_update_posted_date": "2021-04-05",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 1,
      "location_summary": "Murray, Utah",
      "locations": [
        {
          "city": "Murray",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02460211"
    },
    {
      "nct_id": "NCT02802267",
      "title": "Efficacy Study of Inecalcitol With Decitabine in Acute Myeloid Leukemia Patients Unfit for Standard Chemotherapy",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Acute Myelogenous Leukemia"
      ],
      "interventions": [
        {
          "name": "Inecalcitol",
          "type": "DRUG"
        },
        {
          "name": "Placebo Oral Tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hybrigenics Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 110,
      "start_date": "2016-06",
      "completion_date": "2019-12",
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 7,
      "location_summary": "San Diego, California • Augusta, Georgia • Las Vegas, Nevada + 4 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        },
        {
          "city": "Albuquerque",
          "state": "New Mexico"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02802267"
    },
    {
      "nct_id": "NCT00779909",
      "title": "Dose-dependent Anti-inflammatory Effects of Vitamin D in a Human Gingivitis Model",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Gingivitis"
      ],
      "interventions": [
        {
          "name": "vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Boston University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 35,
      "start_date": "2008-12",
      "completion_date": "2011-09",
      "has_results": true,
      "last_update_posted_date": "2017-10-02",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00779909"
    },
    {
      "nct_id": "NCT04642287",
      "title": "Immunotherapy After Transplantation for Skin Cancer Prevention in Organ Transplant Recipients",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Immunotherapy",
        "Cutaneous Squamous Cell Carcinoma",
        "Actinic Keratoses",
        "Organ Transplant Recipients",
        "Skin Cancer"
      ],
      "interventions": [
        {
          "name": "Calcipotriol Only Product in Cutaneous Dose Form",
          "type": "DRUG"
        },
        {
          "name": "Vaseline",
          "type": "DRUG"
        },
        {
          "name": "Topical 5FU",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "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": 0,
      "start_date": "2026-01",
      "completion_date": "2030-01",
      "has_results": false,
      "last_update_posted_date": "2025-05-07",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • St Louis, Missouri",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04642287"
    },
    {
      "nct_id": "NCT01855321",
      "title": "Effects of Treating Vitamin D Deficiency in Poorly Controlled Type 2 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Type 2 Diabetes"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "30 Years to 65 Years"
      },
      "enrollment_count": 76,
      "start_date": "2010-08",
      "completion_date": "2015-03",
      "has_results": false,
      "last_update_posted_date": "2015-06-26",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01855321"
    },
    {
      "nct_id": "NCT00904033",
      "title": "Calcitriol, Physical Activity, and Bone Health in Cancer Survivors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Neoplasms",
        "Bone and Bones"
      ],
      "interventions": [
        {
          "name": "Calcitriol",
          "type": "DRUG"
        },
        {
          "name": "Exercise",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Multivitamin",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Rochester",
      "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": 41,
      "start_date": "2008-12-01",
      "completion_date": "2018-01-01",
      "has_results": true,
      "last_update_posted_date": "2019-04-23",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00904033"
    },
    {
      "nct_id": "NCT01011114",
      "title": "Using Cinacalcet to Treat the Hypophosphatemia of Early Kidney Transplant",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypophosphatemia",
        "Renal Transplant"
      ],
      "interventions": [
        {
          "name": "Cinacalcet",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Montefiore Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2009-11",
      "completion_date": "2015-10-15",
      "has_results": false,
      "last_update_posted_date": "2021-04-23",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01011114"
    },
    {
      "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": "2026-11-15T14:19:38.482Z",
      "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": "NCT01884844",
      "title": "Vitamin D Supplementation for Bipolar Depression",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Bipolar Disorder",
        "Bipolar Depression"
      ],
      "interventions": [
        {
          "name": "Vitamin D3, Cholecalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 33,
      "start_date": "2013-06",
      "completion_date": "2015-08",
      "has_results": true,
      "last_update_posted_date": "2018-06-19",
      "last_synced_at": "2026-11-15T14:19:38.482Z",
      "location_count": 2,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        },
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01884844"
    }
  ]
}