{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+D+Deficiency+Disease&page=3",
    "query": {
      "condition": "Vitamin D Deficiency Disease",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 344,
    "total_pages": 35,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+D+Deficiency+Disease&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+D+Deficiency+Disease&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T13:10:41.964Z",
  "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": "NCT04372446",
      "title": "Understanding the Spectrum of ENPP1 Deficiency and Acute ABCC6 Deficiency",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Generalized Arterial Calcification in Infancy",
        "Autosomal Recessive Hypophosphatemic Rickets Type 2"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Inozyme Pharma",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 38,
      "start_date": "2020-05-06",
      "completion_date": "2020-09-30",
      "has_results": false,
      "last_update_posted_date": "2021-04-01",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Eagan, Minnesota",
      "locations": [
        {
          "city": "Eagan",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04372446"
    },
    {
      "nct_id": "NCT04225819",
      "title": "Adjunctive Treatment With Vitamin D3 in Patients With Active IBD",
      "overall_status": "SUSPENDED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "IBD",
        "Inflammatory Bowel Diseases",
        "Crohn Disease",
        "Ulcerative Colitis",
        "Vitamin D3 Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2020-10-01",
      "completion_date": "2029-04-01",
      "has_results": false,
      "last_update_posted_date": "2026-04-27",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04225819"
    },
    {
      "nct_id": "NCT01472796",
      "title": "Vitamin D Augmentation of Tekturna (Aliskiren) in Hypertension",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Vitamin D (cholecalciferol)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Tekturna(Aliskiren) plus placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Wayne State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "30 Years to 74 Years"
      },
      "enrollment_count": 92,
      "start_date": "2011-07",
      "completion_date": "2014-03",
      "has_results": false,
      "last_update_posted_date": "2011-11-16",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01472796"
    },
    {
      "nct_id": "NCT05509595",
      "title": "Burosumab for Fibroblast Growth Factor-23 Mediated Hypophosphatemia in Fibrous Dysplasia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Fibrous Dysplasia Of Bone"
      ],
      "interventions": [
        {
          "name": "Burosumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Dental and Craniofacial Research (NIDCR)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "1 Year to 99 Years"
      },
      "enrollment_count": 12,
      "start_date": "2022-12-07",
      "completion_date": "2024-11-18",
      "has_results": true,
      "last_update_posted_date": "2026-02-02",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05509595"
    },
    {
      "nct_id": "NCT01354262",
      "title": "Effect of Vitamin D Supplementation on Hemoglobin A1c",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Diabetes Mellitus",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Ascension Health",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "34 Years",
        "maximum_age": "69 Years",
        "sex": "ALL",
        "summary": "34 Years to 69 Years"
      },
      "enrollment_count": 150,
      "start_date": "2011-03",
      "completion_date": "2012-06",
      "has_results": false,
      "last_update_posted_date": "2015-04-23",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Flint, Michigan",
      "locations": [
        {
          "city": "Flint",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01354262"
    },
    {
      "nct_id": "NCT02337257",
      "title": "Periodontal and Cardiometabolic Responses to Vitamin D Intervention in African Americans With Periodontal Disease",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Periodontal Disease",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Augusta University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 24,
      "start_date": "2014-04",
      "completion_date": "2015-12",
      "has_results": false,
      "last_update_posted_date": "2015-01-13",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02337257"
    },
    {
      "nct_id": "NCT01306656",
      "title": "Vitamin D Repletion in Primary Hyperparathyroidism",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Primary Hyperparathyroidism",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "10,000 IU Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 9,
      "start_date": "2011-10",
      "completion_date": "2017-02",
      "has_results": true,
      "last_update_posted_date": "2019-04-16",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01306656"
    },
    {
      "nct_id": "NCT01475890",
      "title": "Vitamin D Supplementation in HIV",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "HIV-infection/Aids"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "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": "24 Years",
        "sex": "ALL",
        "summary": "5 Years to 24 Years"
      },
      "enrollment_count": 58,
      "start_date": "2011-07",
      "completion_date": "2017-02",
      "has_results": false,
      "last_update_posted_date": "2017-03-17",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01475890"
    },
    {
      "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": "2026-10-07T13:10:41.964Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03401541"
    },
    {
      "nct_id": "NCT00739505",
      "title": "Safety Study of Human Recombinant Tissue Non-Specific Alkaline Phosphatase Fusion Protein Asfotase Alfa in Adults With Hypophosphatasia (HPP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hypophosphatasia (HPP)"
      ],
      "interventions": [
        {
          "name": "Asfotase Alfa",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 6,
      "start_date": "2008-08",
      "completion_date": "2009-02",
      "has_results": false,
      "last_update_posted_date": "2019-03-29",
      "last_synced_at": "2026-10-07T13:10:41.964Z",
      "location_count": 2,
      "location_summary": "St Louis, Missouri • Durham, North Carolina",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00739505"
    }
  ]
}