{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D&page=3",
    "query": {
      "intervention": "25(OH)D",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 71,
    "total_pages": 8,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=25%28OH%29D&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T03:07:21.838Z",
  "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": "NCT02485197",
      "title": "Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "7 continuous days of aerobic training",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "David Travis Thomas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "65 Years to 75 Years"
      },
      "enrollment_count": 7,
      "start_date": "2013-03",
      "completion_date": "2015-06",
      "has_results": false,
      "last_update_posted_date": "2017-03-17",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Lexington, Kentucky",
      "locations": [
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02485197"
    },
    {
      "nct_id": "NCT04939792",
      "title": "Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D + L-cysteine",
          "type": "DRUG"
        },
        {
          "name": "L-cysteine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Louisiana State University Health Sciences Center Shreveport",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 165,
      "start_date": "2020-11-06",
      "completion_date": "2022-10-31",
      "has_results": false,
      "last_update_posted_date": "2023-06-08",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Shreveport, Louisiana",
      "locations": [
        {
          "city": "Shreveport",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04939792"
    },
    {
      "nct_id": "NCT01295034",
      "title": "Vitamin D Supplements for HIV-positive Patients on cART",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV-associated Co-morbidities"
      ],
      "interventions": [
        {
          "name": "conventional vitamin D treatment",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "tiered/titrated vitamin D dosing",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Andrea Branch",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 62,
      "start_date": "2011-03",
      "completion_date": "2015-06",
      "has_results": true,
      "last_update_posted_date": "2017-04-17",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01295034"
    },
    {
      "nct_id": "NCT01469650",
      "title": "Serum 25-hydroxy Vitamin D [25(OH)D] Levels, Supplemental Vitamin D, and Parathyroid Hormone Levels in Premature Infants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Premature Infants"
      ],
      "interventions": [
        {
          "name": "cholecalciferal",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "23 Weeks",
        "maximum_age": "32 Weeks",
        "sex": "ALL",
        "summary": "23 Weeks to 32 Weeks"
      },
      "enrollment_count": 32,
      "start_date": "2012-01",
      "completion_date": "2013-07",
      "has_results": false,
      "last_update_posted_date": "2023-09-06",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01469650"
    },
    {
      "nct_id": "NCT01327794",
      "title": "Relationship Between Vitamin D Biomarkers and Survival in Blood Samples From Patients With Advanced Pancreatic Cancer",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pancreatic Cancer"
      ],
      "interventions": [
        {
          "name": "polymorphism analysis",
          "type": "GENETIC"
        },
        {
          "name": "immunologic technique",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "medical chart review",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "GENETIC",
        "OTHER"
      ],
      "sponsor": "Alliance for Clinical Trials in Oncology",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 265,
      "start_date": "2011-06",
      "completion_date": "2014-08",
      "has_results": false,
      "last_update_posted_date": "2016-06-29",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Glens Falls, New York",
      "locations": [
        {
          "city": "Glens Falls",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01327794"
    },
    {
      "nct_id": "NCT02256605",
      "title": "Vitamin D3 Supplementation in Pediatric IBD: Weely vs Daily Dosing Regimens",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Inflammatory Bowel Disease (IBD)"
      ],
      "interventions": [
        {
          "name": "Vitamin D-3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Nemours Children's Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "5 Years to 17 Years"
      },
      "enrollment_count": 40,
      "start_date": "2013-11",
      "completion_date": "2015-05",
      "has_results": false,
      "last_update_posted_date": "2015-05-29",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02256605"
    },
    {
      "nct_id": "NCT01554241",
      "title": "Optimizing Vitamin D in the Elderly",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Deficiency of Vitamin D3"
      ],
      "interventions": [
        {
          "name": "D3 2000 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "D3 4000 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "D3 50,000 IU weekly",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "vitamin D3 800 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 86,
      "start_date": "2012-09",
      "completion_date": "2014-09",
      "has_results": true,
      "last_update_posted_date": "2015-02-18",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01554241"
    },
    {
      "nct_id": "NCT01498406",
      "title": "Vitamin D Status, Disease Specific and Quality of Life Outcomes in Patients With Cutaneous Lupus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cutaneous Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3,
      "start_date": "2011-12",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2013-11-20",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01498406"
    },
    {
      "nct_id": "NCT01709474",
      "title": "Vitamin D3 Treatment in Pediatric Systemic Lupus Erythematosus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Systemic Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 6000 IU",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 400 IU",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "20 Years",
        "sex": "ALL",
        "summary": "5 Years to 20 Years"
      },
      "enrollment_count": 7,
      "start_date": "2013-06",
      "completion_date": "2014-07",
      "has_results": true,
      "last_update_posted_date": "2015-12-17",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 13,
      "location_summary": "Los Angeles, California • Palo Alto, California • San Francisco, California + 9 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01709474"
    },
    {
      "nct_id": "NCT01773278",
      "title": "Cholesterol and Antioxidant Treatment in Patients With Smith-Lemli-Opitz Syndrome (SLOS)",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Smith-Lemli-Opitz Syndrome",
        "Cone-Rod Dystrophy",
        "Hearing Loss"
      ],
      "interventions": [
        {
          "name": "Antioxidants",
          "type": "DRUG"
        },
        {
          "name": "Cholesterol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "Up to 65 Years"
      },
      "enrollment_count": 100,
      "start_date": "2008-12",
      "completion_date": "2025-12",
      "has_results": false,
      "last_update_posted_date": "2024-05-08",
      "last_synced_at": "2026-10-07T03:07:21.838Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01773278"
    }
  ]
}