{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+D+Insufficiency",
    "query": {
      "condition": "Vitamin D Insufficiency"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 96,
    "total_pages": 10,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Vitamin+D+Insufficiency&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T06:46:11.407Z",
  "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": "NCT00823303",
      "title": "Paricalcitol Versus Calcitriol for Efficacy and Safety in Stage 3/4 Chronic Kidney Disease (CKD) With Secondary Hyperparathyroidism (SHPT)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism",
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Paricalcitol",
          "type": "DRUG"
        },
        {
          "name": "Calcitriol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 110,
      "start_date": "2009-02",
      "completion_date": "2013-09",
      "has_results": true,
      "last_update_posted_date": "2014-08-07",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 4,
      "location_summary": "Chicago, Illinois • Evanston, Illinois • Detroit, Michigan + 1 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Evanston",
          "state": "Illinois"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00823303"
    },
    {
      "nct_id": "NCT00123461",
      "title": "Study of Safety and Efficacy of Doxercalciferol in Patients With Chronic Kidney Disease, Stage 3 or 4, and Secondary Hyperparathyroidism",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism",
        "Renal Failure",
        "Chronic Renal Insufficiency"
      ],
      "interventions": [
        {
          "name": "Hectorol (doxercalciferol capsules), 0.5mcg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Genzyme, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 70,
      "start_date": "2005-07",
      "completion_date": "2007-10",
      "has_results": false,
      "last_update_posted_date": "2015-05-05",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 17,
      "location_summary": "Phoenix, Arizona • Alhambra, California • Riverside, California + 14 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Alhambra",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Ocala",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00123461"
    },
    {
      "nct_id": "NCT03621553",
      "title": "Vitamin D Homeostasis in Sarcoidosis",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Sarcoidosis",
        "Vitamin D Insufficiency"
      ],
      "interventions": [
        {
          "name": "Ergocalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium Citrate with Vitamin D2",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 90,
      "start_date": "2010-07-01",
      "completion_date": "2026-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-02",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03621553"
    },
    {
      "nct_id": "NCT06288451",
      "title": "DePTH: De-emphasize PTH",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Kidney Failure, Chronic",
        "Chronic Kidney Disease-Mineral and Bone Disorder"
      ],
      "interventions": [
        {
          "name": "Oral calcitriol with cinacalcet rescue",
          "type": "DRUG"
        },
        {
          "name": "IV activated vitamin D",
          "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": 90,
      "start_date": "2024-03-11",
      "completion_date": "2027-02-28",
      "has_results": false,
      "last_update_posted_date": "2025-06-02",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06288451"
    },
    {
      "nct_id": "NCT02962102",
      "title": "Activated Vitamin D for the Prevention and Treatment of Acute Kidney Injury",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Critically Ill",
        "Acute Kidney Injury"
      ],
      "interventions": [
        {
          "name": "Calcifediol",
          "type": "DRUG"
        },
        {
          "name": "Calcitriol",
          "type": "DRUG"
        },
        {
          "name": "Placebos",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "David Leaf",
      "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": "2017-04-03",
      "completion_date": "2020-08-06",
      "has_results": true,
      "last_update_posted_date": "2025-09-29",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02962102"
    },
    {
      "nct_id": "NCT03660800",
      "title": "Pharmacokinetics and Safety Study of CTAP101 Capsules in Japanese and Non-Japanese Healthy Subjects and Non-Japanese Healthy Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vitamin D Insufficiency",
        "Secondary Hyperparathyroidism"
      ],
      "interventions": [
        {
          "name": "CTAP101 Capsules",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "OPKO Health, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 67,
      "start_date": "2018-08-20",
      "completion_date": "2019-01-22",
      "has_results": false,
      "last_update_posted_date": "2019-09-30",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 1,
      "location_summary": "Cypress, California",
      "locations": [
        {
          "city": "Cypress",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03660800"
    },
    {
      "nct_id": "NCT01012414",
      "title": "Effect of Vitamin D Supplement on Inflammation Markers in High-Risk Cardiovascular Patients With Chronic Kidney Disease",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Coronary Artery Disease",
        "Chronic Kidney Disease",
        "Hypovitaminosis D",
        "Secondary Hyperparathyroidism"
      ],
      "interventions": [
        {
          "name": "paricalcitol",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Thomas Jefferson University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2010-01",
      "completion_date": "2011-05",
      "has_results": true,
      "last_update_posted_date": "2014-05-20",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01012414"
    },
    {
      "nct_id": "NCT01222234",
      "title": "Impact of Vitamin D Therapies on Chronic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Kidney Disease (CKD)",
        "End-stage Renal Disease (ESRD)"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol - CKD",
          "type": "DRUG"
        },
        {
          "name": "Calcitriol - CKD",
          "type": "DEVICE"
        },
        {
          "name": "Cholecalciferol - non-CKD",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "21 Years to 90 Years"
      },
      "enrollment_count": 56,
      "start_date": "2010-10",
      "completion_date": "2012-08",
      "has_results": true,
      "last_update_posted_date": "2016-05-16",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 1,
      "location_summary": "Kansas City, Kansas",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01222234"
    },
    {
      "nct_id": "NCT01787409",
      "title": "Cholecalciferol in Improving Survival in Patients With Newly Diagnosed Cancer With Vitamin D Insufficiency",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Aggressive Non-Hodgkin Lymphoma",
        "Anaplastic Large Cell Lymphoma",
        "Angioimmunoblastic T-Cell Lymphoma",
        "Chronic Lymphocytic Leukemia",
        "Diffuse Large B-Cell Lymphoma",
        "Enteropathy-Associated T-Cell Lymphoma",
        "Hepatosplenic T-Cell Lymphoma",
        "Mature T-Cell and NK-Cell Non-Hodgkin Lymphoma",
        "Mediastinal (Thymic) Large B-Cell Lymphoma",
        "Nasal Type Extranodal NK/T-Cell Lymphoma",
        "Peripheral T-Cell Lymphoma, Not Otherwise Specified",
        "Primary Cutaneous Anaplastic Large Cell Lymphoma",
        "Refractory Anaplastic Large Cell Lymphoma",
        "Small Lymphocytic Lymphoma",
        "Subcutaneous Panniculitis-Like T-Cell Lymphoma"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 565,
      "start_date": "2013-03-06",
      "completion_date": "2028-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-12-30",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 5,
      "location_summary": "Scottsdale, Arizona • Atlanta, Georgia • Iowa City, Iowa + 2 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01787409"
    },
    {
      "nct_id": "NCT05543928",
      "title": "Phase 3 Safety and Efficacy Study of CTAP101 Extended-release Capsules in Children With Secondary Hyperparathyroidism",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Kidney Disease stage3",
        "Chronic Kidney Disease stage4",
        "Vitamin d Deficiency",
        "Secondary Hyperparathyroidism"
      ],
      "interventions": [
        {
          "name": "CTAP101",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "OPKO Health, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "8 Years to 17 Years"
      },
      "enrollment_count": 2,
      "start_date": "2023-01-31",
      "completion_date": "2024-06-19",
      "has_results": true,
      "last_update_posted_date": "2025-07-25",
      "last_synced_at": "2026-05-22T06:46:11.407Z",
      "location_count": 2,
      "location_summary": "Columbus, Ohio • Greenville, South Carolina",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        },
        {
          "city": "Greenville",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05543928"
    }
  ]
}