{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=cholecalciferol+%28vitamin+D%29&page=35",
    "query": {
      "intervention": "cholecalciferol (vitamin D)",
      "page": 35
    },
    "page_size": 10
  },
  "pagination": {
    "page": 35,
    "page_size": 10,
    "total_count": 960,
    "total_pages": 96,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=cholecalciferol+%28vitamin+D%29&page=36&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=cholecalciferol+%28vitamin+D%29&page=34&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-17T01:32:58.840Z",
  "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": "NCT02464059",
      "title": "Cathelicidin and Vitamin D: Impact on Populations At-Risk and With COPD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pulmonary Disease, Chronic Obstructive"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 23,
      "start_date": "2015-11-10",
      "completion_date": "2020-04-15",
      "has_results": true,
      "last_update_posted_date": "2020-07-24",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland • Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02464059"
    },
    {
      "nct_id": "NCT06383117",
      "title": "Understanding Effects of Calcium on the Gut-Bone Axis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy",
        "Adult",
        "Calcium",
        "Bone Resorption",
        "Endocrine; Obesity"
      ],
      "interventions": [
        {
          "name": "Calcium carbonate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo Control",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Georgia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 14,
      "start_date": "2023-10-17",
      "completion_date": "2024-02-23",
      "has_results": false,
      "last_update_posted_date": "2024-04-25",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Athens, Georgia",
      "locations": [
        {
          "city": "Athens",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06383117"
    },
    {
      "nct_id": "NCT01105689",
      "title": "Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Nemours Children's Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "3 Years",
        "sex": "ALL",
        "summary": "6 Months to 3 Years"
      },
      "enrollment_count": 60,
      "start_date": "2010-03",
      "completion_date": "2011-07",
      "has_results": false,
      "last_update_posted_date": "2011-09-09",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01105689"
    },
    {
      "nct_id": "NCT00073710",
      "title": "Study to Evaluate the Effects of Zemplar Injection and Calcijex on Intestinal Absorption of Calcium",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism",
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "Zemplar",
          "type": "DRUG"
        },
        {
          "name": "42 Ca carbonate absorption via single tracer method",
          "type": "PROCEDURE"
        },
        {
          "name": "Calcijex",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "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": 30,
      "start_date": "2004-09",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2006-08-02",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00073710"
    },
    {
      "nct_id": "NCT03828097",
      "title": "The Effects of a Multi-vitamin Supplement in Adult Females",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Health, Subjective"
      ],
      "interventions": [
        {
          "name": "Experimental supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Auburn University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 40 Years · Female only"
      },
      "enrollment_count": 94,
      "start_date": "2018-05-01",
      "completion_date": "2019-06-01",
      "has_results": false,
      "last_update_posted_date": "2020-09-28",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Auburn, Alabama",
      "locations": [
        {
          "city": "Auburn",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03828097"
    },
    {
      "nct_id": "NCT01753856",
      "title": "Effects of Teriparatide or Denosumab on Bone in Postmenopausal Women With Osteoporosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Denosumab",
          "type": "DRUG"
        },
        {
          "name": "Demeclocycline",
          "type": "DRUG"
        },
        {
          "name": "Tetracycline",
          "type": "DRUG"
        },
        {
          "name": "Calcium Supplement",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "89 Years",
        "sex": "FEMALE",
        "summary": "55 Years to 89 Years · Female only"
      },
      "enrollment_count": 69,
      "start_date": "2013-01",
      "completion_date": "2014-06",
      "has_results": true,
      "last_update_posted_date": "2015-10-08",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 4,
      "location_summary": "Lakewood, Colorado • Gainesville, Georgia • Detroit, Michigan + 1 more",
      "locations": [
        {
          "city": "Lakewood",
          "state": "Colorado"
        },
        {
          "city": "Gainesville",
          "state": "Georgia"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01753856"
    },
    {
      "nct_id": "NCT02066441",
      "title": "Vitamin D's Effect on Physical Performance in the Elderly",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Family Member"
      ],
      "interventions": [
        {
          "name": "Bio-D-Mulsion Forte®",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 101,
      "start_date": "2014-02",
      "completion_date": "2015-01",
      "has_results": false,
      "last_update_posted_date": "2015-05-19",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02066441"
    },
    {
      "nct_id": "NCT01317940",
      "title": "Nutrition and Body Composition in Acute Lymphoblastic Leukemia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Precursor Cell Lymphoblastic Leukemia-Lymphoma",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D and Calcium Citrate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Children's Hospital Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "29 Years",
        "sex": "ALL",
        "summary": "10 Years to 29 Years"
      },
      "enrollment_count": 76,
      "start_date": "2011-03",
      "completion_date": "2016-01",
      "has_results": true,
      "last_update_posted_date": "2020-07-08",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01317940"
    },
    {
      "nct_id": "NCT03686150",
      "title": "Vitamin D Oral Replacement in Asthma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Asthma",
        "Vitamin D Deficiency",
        "Pediatric Obesity"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 oral regimen",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "IDeA States Pediatric Clinical Trials Network",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Years to 17 Years"
      },
      "enrollment_count": 112,
      "start_date": "2019-01-30",
      "completion_date": "2021-09-30",
      "has_results": true,
      "last_update_posted_date": "2023-04-19",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 15,
      "location_summary": "Little Rock, Arkansas • Wilmington, Delaware • Honolulu, Hawaii + 12 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Wilmington",
          "state": "Delaware"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Baton Rouge",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03686150"
    },
    {
      "nct_id": "NCT02221596",
      "title": "Vitamin D and Muscle Metabolic Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "aerobic training",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "David Travis Thomas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2014-09",
      "completion_date": "2018-03-01",
      "has_results": false,
      "last_update_posted_date": "2018-03-15",
      "last_synced_at": "2026-10-17T01:32:58.840Z",
      "location_count": 1,
      "location_summary": "Lexington, Kentucky",
      "locations": [
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02221596"
    }
  ]
}