{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+A+Deficiency",
    "query": {
      "condition": "Vitamin A Deficiency"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 137,
    "total_pages": 14,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+A+Deficiency&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T02:10:33.526Z",
  "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": "NCT00502866",
      "title": "Study to Assess the Use of a Simple Lab Test to Screen for Rickets in Children",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rickets"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Agency for Healthcare Research and Quality (AHRQ)",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "15 Months",
        "sex": "ALL",
        "summary": "6 Months to 15 Months"
      },
      "enrollment_count": 246,
      "start_date": "2006-06",
      "completion_date": "2008-06",
      "has_results": false,
      "last_update_posted_date": "2014-01-08",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00502866"
    },
    {
      "nct_id": "NCT00840112",
      "title": "Vitamin E Treatment for Long-Chain 3-Hydroxyacyl Coenzyme A (CoA) Dehydrogenase (LCHAD) Associated Neuropathy",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Peripheral Neuropathy",
        "Mitochondrial Trifunctional Protein Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin E supplement",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "7 Years and older"
      },
      "enrollment_count": 1,
      "start_date": "2010-07",
      "completion_date": "2015-10",
      "has_results": false,
      "last_update_posted_date": "2015-10-21",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00840112"
    },
    {
      "nct_id": "NCT01328704",
      "title": "Evaluate the Change in Iron, Vitamin D, and C-Reactive Protein Level (CRP) in a 12 to 24 Week Period",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anemia",
        "Vitamin D Deficiency"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Avera McKennan Hospital & University Health Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "30 Years to 50 Years"
      },
      "enrollment_count": 50,
      "start_date": "2012-01",
      "completion_date": "2013-03",
      "has_results": false,
      "last_update_posted_date": "2014-08-25",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Sioux Falls, South Dakota",
      "locations": [
        {
          "city": "Sioux Falls",
          "state": "South Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01328704"
    },
    {
      "nct_id": "NCT01090206",
      "title": "Correlation Between Vitamin D Status and Bone Mineral Density in Patients With Hemophilia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hemophilia A",
        "Hemophilia B",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D and calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "21 Years",
        "sex": "MALE",
        "summary": "2 Years to 21 Years · Male only"
      },
      "enrollment_count": 20,
      "start_date": "2010-03",
      "completion_date": "2015-03",
      "has_results": false,
      "last_update_posted_date": "2016-04-29",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01090206"
    },
    {
      "nct_id": "NCT02534714",
      "title": "Analysis of Hypovitaminosis D and Osteopenia/Osteoporosis in Spinal Disease Patients Who Underwent a Spinal Fusion at Illinois Neurological Institute, Peoria, IL., a Retrospective Review From November 1, 2012 to October 31, 2014 and Prospective Pilot From July 1, 2015-June 30, 2016",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypovitaminosis D",
        "Spinal Disease",
        "Osteoporosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "OSF Healthcare System",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 460,
      "start_date": "2015-07",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2018-08-28",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Peoria, Illinois",
      "locations": [
        {
          "city": "Peoria",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02534714"
    },
    {
      "nct_id": "NCT01827345",
      "title": "Vitamin D as a Supplement Against Falls in Elderly Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency (10 ng/mL to 30 ng/mL)"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "70 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "70 Years and older"
      },
      "enrollment_count": 25,
      "start_date": "2013-04",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2016-12-26",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01827345"
    },
    {
      "nct_id": "NCT00500812",
      "title": "A Safety Study for Cethrin (BA-210) in the Treatment of Acute Thoracic and Cervical Spinal Cord Injuries",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Spinal Cord Injury"
      ],
      "interventions": [
        {
          "name": "Cethrin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vertex Pharmaceuticals Incorporated",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "16 Years to 70 Years"
      },
      "enrollment_count": 48,
      "start_date": "2005-02",
      "completion_date": "2009-02",
      "has_results": false,
      "last_update_posted_date": "2016-04-14",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 5,
      "location_summary": "Phoenix, Arizona • Cincinnati, Ohio • Philadelphia, Pennsylvania + 2 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Charlottesville",
          "state": "Virginia"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00500812"
    },
    {
      "nct_id": "NCT01650883",
      "title": "A Prospective Open-label Comparison of Two Vitamin D3 Repletion Strategies in Vitamin D Deficient Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D 25 OH Deficiency"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Cholecalciferol 5,000 IU",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of South Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 56,
      "start_date": "2009-03",
      "completion_date": "2011-04",
      "has_results": false,
      "last_update_posted_date": "2012-07-26",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01650883"
    },
    {
      "nct_id": "NCT01268176",
      "title": "The Effect of a Meal on Vitamin D Absorption",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "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": "69 Years",
        "sex": "ALL",
        "summary": "50 Years to 69 Years"
      },
      "enrollment_count": 62,
      "start_date": "2010-12",
      "completion_date": "2012-06",
      "has_results": false,
      "last_update_posted_date": "2013-05-13",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01268176"
    },
    {
      "nct_id": "NCT02676674",
      "title": "Vitamin D Levels Following Topical Application of Vitamin D Ointment",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Dose 1",
          "type": "DRUG"
        },
        {
          "name": "Dose 2",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 10,
      "start_date": "2016-03",
      "completion_date": "2017-06-15",
      "has_results": false,
      "last_update_posted_date": "2019-11-01",
      "last_synced_at": "2026-05-22T02:10:33.526Z",
      "location_count": 1,
      "location_summary": "Saint Paul, Minnesota",
      "locations": [
        {
          "city": "Saint Paul",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02676674"
    }
  ]
}