{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D",
    "query": {
      "intervention": "25(OH)D"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 70,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-24T20:17:04.787Z",
  "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": "NCT03104855",
      "title": "Clearance of 25-hydroxyvitamin D in Cystic Fibrosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cystic Fibrosis"
      ],
      "interventions": [
        {
          "name": "d6-25-hydroxyvitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2017-04-03",
      "completion_date": "2023-09-06",
      "has_results": true,
      "last_update_posted_date": "2023-10-12",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03104855"
    },
    {
      "nct_id": "NCT04885803",
      "title": "Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Softgel Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Nano Liquid Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "25(OH)D Blood Serum Test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Placebo Control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "Inspired Life Medical, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 114,
      "start_date": "2021-03-26",
      "completion_date": "2021-07-30",
      "has_results": false,
      "last_update_posted_date": "2021-08-24",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Le Sueur, Minnesota",
      "locations": [
        {
          "city": "Le Sueur",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04885803"
    },
    {
      "nct_id": "NCT05016310",
      "title": "A Study of High-Dose Vit D Versus Standard of Care Vit D Supplementation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast",
        "Breast Cancer",
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "High Dose Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Standard of Care Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "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": 7,
      "start_date": "2021-09-16",
      "completion_date": "2024-08-15",
      "has_results": false,
      "last_update_posted_date": "2025-07-23",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05016310"
    },
    {
      "nct_id": "NCT01141192",
      "title": "The Effect of Vitamin D Supplementation on Glucose Metabolism in Non-Diabetic African American Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 2 Diabetes"
      ],
      "interventions": [
        {
          "name": "vitamin D3, cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Inactive comparator",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Augusta University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "19 Years to 60 Years"
      },
      "enrollment_count": 48,
      "start_date": "2010-01",
      "completion_date": "2010-05",
      "has_results": false,
      "last_update_posted_date": "2010-06-10",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01141192"
    },
    {
      "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": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01498406"
    },
    {
      "nct_id": "NCT06366776",
      "title": "Emulated Study of Vitamin D Correction Vs Non-Correction",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "The Cooper Health System",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 9000,
      "start_date": "2024-08-14",
      "completion_date": "2025-10",
      "has_results": false,
      "last_update_posted_date": "2025-01-22",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Camden, New Jersey",
      "locations": [
        {
          "city": "Camden",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06366776"
    },
    {
      "nct_id": "NCT01327794",
      "title": "Relationship Between Vitamin D Biomarkers and Survival in Blood Samples From Patients With Advanced Pancreatic Cancer",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pancreatic Cancer"
      ],
      "interventions": [
        {
          "name": "polymorphism analysis",
          "type": "GENETIC"
        },
        {
          "name": "immunologic technique",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "medical chart review",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "GENETIC",
        "OTHER"
      ],
      "sponsor": "Alliance for Clinical Trials in Oncology",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 265,
      "start_date": "2011-06",
      "completion_date": "2014-08",
      "has_results": false,
      "last_update_posted_date": "2016-06-29",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Glens Falls, New York",
      "locations": [
        {
          "city": "Glens Falls",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01327794"
    },
    {
      "nct_id": "NCT00921557",
      "title": "Safety and Effectiveness of Alendronate for Bone Mineral Density in HIV-infected Children and Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "HIV Infection"
      ],
      "interventions": [
        {
          "name": "Alendronate",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium carbonate/vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "24 Years",
        "sex": "ALL",
        "summary": "11 Years to 24 Years"
      },
      "enrollment_count": 52,
      "start_date": "2009-11",
      "completion_date": "2017-01",
      "has_results": true,
      "last_update_posted_date": "2021-11-05",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 7,
      "location_summary": "Los Angeles, California • Miami, Florida • Tampa, Florida + 4 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00921557"
    },
    {
      "nct_id": "NCT03401541",
      "title": "25-Hydroxyvitamin D Pharmacokinetic Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Fat Malabsorption"
      ],
      "interventions": [
        {
          "name": "Calcifediol",
          "type": "DRUG"
        },
        {
          "name": "Calciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boston University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 16,
      "start_date": "2018-10-01",
      "completion_date": "2019-11-01",
      "has_results": false,
      "last_update_posted_date": "2020-06-04",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03401541"
    },
    {
      "nct_id": "NCT02954549",
      "title": "Vitamin D Supplementation in Warfighters",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency Disease"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Madigan Army Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 131,
      "start_date": "2016-01",
      "completion_date": "2018-06-29",
      "has_results": false,
      "last_update_posted_date": "2019-05-10",
      "last_synced_at": "2026-09-24T20:17:04.787Z",
      "location_count": 1,
      "location_summary": "Tacoma, Washington",
      "locations": [
        {
          "city": "Tacoma",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02954549"
    }
  ]
}