{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+placebo&page=12",
    "query": {
      "intervention": "Vitamin D placebo",
      "page": 12
    },
    "page_size": 10
  },
  "pagination": {
    "page": 12,
    "page_size": 10,
    "total_count": 437,
    "total_pages": 44,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+placebo&page=13&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+placebo&page=11&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-14T21:14:53.867Z",
  "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": "NCT01173081",
      "title": "The Use of Teriparatide as an Adjunctive Therapy for the Treatment of Jones Fractures",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Fractures"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ohio Orthopedic Center of Excellence",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 38,
      "start_date": "2010-07",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2012-06-05",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Upper Arlington, Ohio",
      "locations": [
        {
          "city": "Upper Arlington",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01173081"
    },
    {
      "nct_id": "NCT01312441",
      "title": "Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Renal Failure Chronic Requiring Hemodialysis"
      ],
      "interventions": [
        {
          "name": "Ergocalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Albany College of Pharmacy and Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2011-01",
      "completion_date": "2015-08",
      "has_results": false,
      "last_update_posted_date": "2016-01-14",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 4,
      "location_summary": "Albany, New York • Clifton Park, New York • Saratoga Springs, New York + 1 more",
      "locations": [
        {
          "city": "Albany",
          "state": "New York"
        },
        {
          "city": "Clifton Park",
          "state": "New York"
        },
        {
          "city": "Saratoga Springs",
          "state": "New York"
        },
        {
          "city": "Troy",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01312441"
    },
    {
      "nct_id": "NCT00428246",
      "title": "Study of Protective Effects of Paricalcitol on Inner Layer of Vessels and Its Protective Effect on Inflammation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Kidney Disease",
        "Endothelial Dysfunction",
        "Inflammation",
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "paricalcitol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 24,
      "start_date": "2006-11",
      "completion_date": "2007-07",
      "has_results": true,
      "last_update_posted_date": "2009-06-03",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00428246"
    },
    {
      "nct_id": "NCT01635062",
      "title": "The VALIDATE-D Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 2 Diabetes",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Calcitriol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "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": 41,
      "start_date": "2012-09",
      "completion_date": "2015-12",
      "has_results": true,
      "last_update_posted_date": "2017-04-11",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01635062"
    },
    {
      "nct_id": "NCT03331562",
      "title": "A SU2C Catalyst® Trial of a PD1 Inhibitor With or Without a Vitamin D Analog for the Maintenance of Pancreatic Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pancreatic Cancer",
        "Pancreas Adenocarcinoma",
        "Advanced Pancreatic Cancer",
        "Metastatic Pancreatic Cancer",
        "Metastatic Pancreatic Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Pembrolizumab",
          "type": "DRUG"
        },
        {
          "name": "paricalcitol",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Translational Genomics Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 24,
      "start_date": "2017-12-27",
      "completion_date": "2020-07-10",
      "has_results": true,
      "last_update_posted_date": "2022-12-27",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 6,
      "location_summary": "Scottsdale, Arizona • Duarte, California • Westwood, Kansas + 3 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Westwood",
          "state": "Kansas"
        },
        {
          "city": "Morristown",
          "state": "New Jersey"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03331562"
    },
    {
      "nct_id": "NCT03848741",
      "title": "Independent and Combined Effects of Resistance Exercise Training and β-hydroxy β-methylbutyrate Plus Vitamin D",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Aging",
        "Skeletal Muscle"
      ],
      "interventions": [
        {
          "name": "Non-Exercise Control",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Resistance Exercise Training",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "HMB+VitD",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Illinois at Urbana-Champaign",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "45 Years to 60 Years · Female only"
      },
      "enrollment_count": 48,
      "start_date": "2019-04-01",
      "completion_date": "2021-04",
      "has_results": false,
      "last_update_posted_date": "2019-07-17",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Urbana, Illinois",
      "locations": [
        {
          "city": "Urbana",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03848741"
    },
    {
      "nct_id": "NCT02684487",
      "title": "Vitamin D Status in Patients With Severe Sepsis",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Sepsis",
        "Severe Sepsis",
        "End Organ Damage",
        "Multi Organ Failure"
      ],
      "interventions": [
        {
          "name": "vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts General Hospital",
      "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": 0,
      "start_date": "2017-12",
      "completion_date": "2022-12",
      "has_results": false,
      "last_update_posted_date": "2021-05-05",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02684487"
    },
    {
      "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": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02337257"
    },
    {
      "nct_id": "NCT00859027",
      "title": "Effect Of Risedronate On Bone Mass In Older Men Receiving Neoadjuvant Therapy For Prostate Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "risedronate",
          "type": "DRUG"
        },
        {
          "name": "Placebo risedronate oral tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "UConn Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "85 Years",
        "sex": "MALE",
        "summary": "55 Years to 85 Years · Male only"
      },
      "enrollment_count": 50,
      "start_date": "2003-01",
      "completion_date": "2009-02",
      "has_results": true,
      "last_update_posted_date": "2018-05-01",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "Farmington, Connecticut",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00859027"
    },
    {
      "nct_id": "NCT01005381",
      "title": "Effect of Calcium Supplement Particle Size and Vitamin D Supplement on Calcium Retention in Adolescent Girls",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Small Particle Size Calcium Carbonate Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Large Particle Size Calcium Carbonate Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Purdue University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "14 Years",
        "sex": "FEMALE",
        "summary": "12 Years to 14 Years · Female only"
      },
      "enrollment_count": 55,
      "start_date": "2007-06",
      "completion_date": "2007-07",
      "has_results": false,
      "last_update_posted_date": "2018-05-09",
      "last_synced_at": "2026-10-14T21:14:53.867Z",
      "location_count": 1,
      "location_summary": "West Lafayette, Indiana",
      "locations": [
        {
          "city": "West Lafayette",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01005381"
    }
  ]
}