{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25-OH+Vitamin+D3",
    "query": {
      "intervention": "25-OH Vitamin D3"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 68,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25-OH+Vitamin+D3&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-28T20:00:32.624Z",
  "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": "NCT01325987",
      "title": "African American Children, Glycemic Control, and Type 2 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 2 Diabetes",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D2",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Sugar pill",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "12 Years to 18 Years"
      },
      "enrollment_count": 31,
      "start_date": "2011-03",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2014-01-20",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01325987"
    },
    {
      "nct_id": "NCT00723385",
      "title": "Effects of Vitamin D on Lipids",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypercholesterolemia",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D (1000 or 2000 IU/day)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 130,
      "start_date": "2008-07",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2015-04-08",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00723385"
    },
    {
      "nct_id": "NCT03576716",
      "title": "Clearance of 25-hydroxyvitamin D3 During Vitamin D3 Supplementation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "D6-25-hydroxyvitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "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": 19,
      "start_date": "2018-06-01",
      "completion_date": "2021-01-01",
      "has_results": true,
      "last_update_posted_date": "2022-05-17",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03576716"
    },
    {
      "nct_id": "NCT01469650",
      "title": "Serum 25-hydroxy Vitamin D [25(OH)D] Levels, Supplemental Vitamin D, and Parathyroid Hormone Levels in Premature Infants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Premature Infants"
      ],
      "interventions": [
        {
          "name": "cholecalciferal",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "23 Weeks",
        "maximum_age": "32 Weeks",
        "sex": "ALL",
        "summary": "23 Weeks to 32 Weeks"
      },
      "enrollment_count": 32,
      "start_date": "2012-01",
      "completion_date": "2013-07",
      "has_results": false,
      "last_update_posted_date": "2023-09-06",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01469650"
    },
    {
      "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": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03401541"
    },
    {
      "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": "2026-09-28T20:00:32.624Z",
      "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": "NCT01709474",
      "title": "Vitamin D3 Treatment in Pediatric Systemic Lupus Erythematosus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Systemic Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 6000 IU",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 400 IU",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "20 Years",
        "sex": "ALL",
        "summary": "5 Years to 20 Years"
      },
      "enrollment_count": 7,
      "start_date": "2013-06",
      "completion_date": "2014-07",
      "has_results": true,
      "last_update_posted_date": "2015-12-17",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 13,
      "location_summary": "Los Angeles, California • Palo Alto, California • San Francisco, California + 9 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01709474"
    },
    {
      "nct_id": "NCT03331536",
      "title": "Skeletal Health in Bariatric Surgery Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bariatric Surgery",
        "Osteoporosis",
        "Fractures, Bone",
        "Roux En-Y Gastric Bypass",
        "Sleeve Gastrectomy",
        "Menopause",
        "Premenopause"
      ],
      "interventions": [
        {
          "name": "Roux en Y Gastric Bypass Pre-menopausal",
          "type": "PROCEDURE"
        },
        {
          "name": "Roux en Y Gastric Bypass Post-menopausal",
          "type": "PROCEDURE"
        },
        {
          "name": "Sleeve Gastrectomy Pre-menopausal",
          "type": "PROCEDURE"
        },
        {
          "name": "Sleeve Gastrectomy Post-menopausal",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "19 Years and older · Female only"
      },
      "enrollment_count": 27,
      "start_date": "2018-03-22",
      "completion_date": "2020-08-02",
      "has_results": false,
      "last_update_posted_date": "2020-08-18",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03331536"
    },
    {
      "nct_id": "NCT00960037",
      "title": "Trial to Assess Response to Oral Vitamin D3 Supplementation in Obese Individuals",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Oral vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo equivalent",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Winthrop University Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 57,
      "start_date": "2009-01",
      "completion_date": "2011-09",
      "has_results": false,
      "last_update_posted_date": "2012-06-18",
      "last_synced_at": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Mineola, New York",
      "locations": [
        {
          "city": "Mineola",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00960037"
    },
    {
      "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": "2026-09-28T20:00:32.624Z",
      "location_count": 1,
      "location_summary": "Le Sueur, Minnesota",
      "locations": [
        {
          "city": "Le Sueur",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04885803"
    }
  ]
}