{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+%28cholecalciferol%29&page=2",
    "query": {
      "intervention": "Vitamin D (cholecalciferol)",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 959,
    "total_pages": 96,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+%28cholecalciferol%29&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+%28cholecalciferol%29&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-08T00:45:25.427Z",
  "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": "NCT02054975",
      "title": "Vitamin D in Pediatric Asthma: a Randomized Controlled Open-label Pilot Trial",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Asthma",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D2 + vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Nationwide Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "8 Years to 17 Years"
      },
      "enrollment_count": 18,
      "start_date": "2014-01",
      "completion_date": "2016-01",
      "has_results": false,
      "last_update_posted_date": "2015-10-08",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02054975"
    },
    {
      "nct_id": "NCT02881957",
      "title": "Hypovitaminosis D in Neurocritical Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Craniocerebral Trauma",
        "Intracranial Aneurysm",
        "Brain Neoplasms",
        "Spinal Cord Injuries",
        "Seizures",
        "Meningitis",
        "Stroke",
        "Intracranial Hemorrhages",
        "Critical Illness",
        "Vitamin d Deficiency"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 274,
      "start_date": "2016-10-10",
      "completion_date": "2018-10-10",
      "has_results": true,
      "last_update_posted_date": "2022-06-15",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02881957"
    },
    {
      "nct_id": "NCT03084328",
      "title": "Vitamin D Replacement in Nonalcoholic Fatty Liver Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Nonalcoholic Fatty Liver"
      ],
      "interventions": [
        {
          "name": "Vitamind D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 48,
      "start_date": "2012-01-20",
      "completion_date": "2017-03-10",
      "has_results": false,
      "last_update_posted_date": "2017-04-13",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03084328"
    },
    {
      "nct_id": "NCT02589600",
      "title": "Zoledronic Acid for Osteoporotic Fracture Prevention (ZEST II)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoporotic Fractures",
        "Osteoporosis, Postmenopausal"
      ],
      "interventions": [
        {
          "name": "Zoledronic acid",
          "type": "DRUG"
        },
        {
          "name": "vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "calcium",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Saline",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Susan L. Greenspan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "65 Years and older · Female only"
      },
      "enrollment_count": 310,
      "start_date": "2016-01",
      "completion_date": "2022-06-22",
      "has_results": true,
      "last_update_posted_date": "2023-09-26",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "New Kensington, Pennsylvania",
      "locations": [
        {
          "city": "New Kensington",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02589600"
    },
    {
      "nct_id": "NCT01542892",
      "title": "Efficacy of Nutritional Supplementation on Physical-activity Mediated Changes in Physical Functioning Older Adults at Risk for Mobility Disability (The VIVE2 Study)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sarcopenia"
      ],
      "interventions": [
        {
          "name": "Exercise Intervention",
          "type": "OTHER"
        },
        {
          "name": "Supplement Intervention",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Tufts University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "70 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "70 Years and older"
      },
      "enrollment_count": 150,
      "start_date": "2011-10",
      "completion_date": "2014-08",
      "has_results": false,
      "last_update_posted_date": "2014-11-18",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01542892"
    },
    {
      "nct_id": "NCT05390736",
      "title": "Evaluating the Cost Effectiveness of STEADI",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Accidental Fall"
      ],
      "interventions": [
        {
          "name": "Gait and balance assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Medication review",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Comorbidity review",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Fall history",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Assessment of feet/footwear",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Assessment of visual acuity",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Home safety risk assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Vitamin D Deficiency",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "National Opinion Research Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 780,
      "start_date": "2020-07-29",
      "completion_date": "2023-09-18",
      "has_results": false,
      "last_update_posted_date": "2023-11-09",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05390736"
    },
    {
      "nct_id": "NCT01746264",
      "title": "Effect of Vitamin D Supplementation on Endothelial Function in Obese Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Obesity",
        "Endothelial Dysfunction",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "12 Years to 18 Years"
      },
      "enrollment_count": 19,
      "start_date": "2012-11",
      "completion_date": "2013-12",
      "has_results": true,
      "last_update_posted_date": "2016-05-02",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01746264"
    },
    {
      "nct_id": "NCT00756899",
      "title": "Vitamin D Deficiency and Low Bone Mineral Content in Children",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Vitamin D Deficiency",
        "Obesity"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "3 Years to 12 Years"
      },
      "enrollment_count": 45,
      "start_date": "2008-07",
      "completion_date": "2012-05",
      "has_results": false,
      "last_update_posted_date": "2012-10-26",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00756899"
    },
    {
      "nct_id": "NCT05869812",
      "title": "Influence of β-hydroxy β-methyl Butyrate (HMB)Supplementation on Post-operative Muscle Mass and Function in Female Athletes",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Atrophy"
      ],
      "interventions": [
        {
          "name": "CaHMB (Dietary supplement, not Drug)",
          "type": "DRUG"
        },
        {
          "name": "CaLa",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Kansas Medical Center",
      "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": 30,
      "start_date": "2023-05-29",
      "completion_date": "2029-12",
      "has_results": false,
      "last_update_posted_date": "2026-03-02",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 1,
      "location_summary": "Overland Park, Kansas",
      "locations": [
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05869812"
    },
    {
      "nct_id": "NCT00062699",
      "title": "Evaluate the Survival Benefits of Zemplar Versus Calcijex in Subjects w/ Stage V Chronic Kidney Disease on Hemodialysis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "End-Stage Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Zemplar (paricalcitol injection)",
          "type": "DRUG"
        },
        {
          "name": "Calcijex",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Abbott",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "20 Years and older"
      },
      "enrollment_count": 2200,
      "start_date": "2003-04",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2006-08-02",
      "last_synced_at": "2026-10-08T00:45:25.427Z",
      "location_count": 60,
      "location_summary": "Tuscaloosa, Alabama • Inglewood, California • Los Angeles, California + 40 more",
      "locations": [
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        },
        {
          "city": "Inglewood",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "San Pablo",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00062699"
    }
  ]
}