{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+Placebo",
    "query": {
      "intervention": "Vitamin D Placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 436,
    "total_pages": 44,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+Placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-22T18:54:43.023Z",
  "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": "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": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02962102"
    },
    {
      "nct_id": "NCT00471237",
      "title": "A Phase II Study Evaluating SB-751689 in Post-Menopausal Women With Osteoporosis.",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Ronacaleret",
          "type": "DRUG"
        },
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Alendronate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "79 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 79 Years · Female only"
      },
      "enrollment_count": 564,
      "start_date": "2007-05-14",
      "completion_date": "2008-12-26",
      "has_results": true,
      "last_update_posted_date": "2017-11-07",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 9,
      "location_summary": "Oakland, California • Palm Desert, California • Walnut Creek, California + 6 more",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Palm Desert",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        },
        {
          "city": "Decatur",
          "state": "Georgia"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00471237"
    },
    {
      "nct_id": "NCT00249704",
      "title": "Randomized Study Of Exercise And Vitamin D In Frail Elderly Subjects",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Elderly, Frail"
      ],
      "interventions": [
        {
          "name": "Vitamin D + Sham Exercise",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D Placebo + Exercise",
          "type": "PROCEDURE"
        },
        {
          "name": "Vitamin D Placebo + Sham Exercise",
          "type": "PROCEDURE"
        },
        {
          "name": "Vitamin D + Exercise",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "75 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "75 Years and older"
      },
      "enrollment_count": 64,
      "start_date": "2005-10",
      "completion_date": "2008-01",
      "has_results": false,
      "last_update_posted_date": "2009-01-08",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 4,
      "location_summary": "Farmington, Connecticut • Hyattsville, Maryland • Roslindale, Massachusetts + 1 more",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        },
        {
          "city": "Hyattsville",
          "state": "Maryland"
        },
        {
          "city": "Roslindale",
          "state": "Massachusetts"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00249704"
    },
    {
      "nct_id": "NCT04134091",
      "title": "The Efficacy, Safety and Tolerability of Oral LPCN 1144 in Subjects With Nonalcoholic Steatohepatitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Nonalcoholic Steatohepatitis (NASH)"
      ],
      "interventions": [
        {
          "name": "LPCN 1144 Formulation A",
          "type": "DRUG"
        },
        {
          "name": "LPCN 1144 Formulation B",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Lipocine Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "MALE",
        "summary": "18 Years to 80 Years · Male only"
      },
      "enrollment_count": 56,
      "start_date": "2019-08-27",
      "completion_date": "2021-06-24",
      "has_results": true,
      "last_update_posted_date": "2023-12-14",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 19,
      "location_summary": "El Cajon, California • Murrieta, California • Rialto, California + 14 more",
      "locations": [
        {
          "city": "El Cajon",
          "state": "California"
        },
        {
          "city": "Murrieta",
          "state": "California"
        },
        {
          "city": "Rialto",
          "state": "California"
        },
        {
          "city": "Roseville",
          "state": "California"
        },
        {
          "city": "Maitland",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04134091"
    },
    {
      "nct_id": "NCT02366481",
      "title": "Vitamin K and Glucose Metabolism in Adults at Risk for Diabetes (Vita-K 'n' Adults Study)",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Insulin Resistance",
        "Insulin Sensitivity",
        "Beta-Cell Dysfunction",
        "Prediabetes"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Low-Dose Vitamin K2 Supplement (menaquinone-7; 90-mcg/d)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "High-Dose Vitamin K2 Supplement (menaquinone-7; 180-mcg/d)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Augusta University",
      "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": 30,
      "start_date": "2015-02",
      "completion_date": "2020-06-30",
      "has_results": false,
      "last_update_posted_date": "2019-11-20",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02366481"
    },
    {
      "nct_id": "NCT05248737",
      "title": "Bioavailability of Vitamin D(25(OH)D) and Omega-3 Fatty Acid (DHA) Enhanced Chicken",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Nutrition, Healthy"
      ],
      "interventions": [
        {
          "name": "DHA/EPA fortified chicken plus Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "non-25(OH)D fortified chicken/eggs plus vitamin D3 supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "non-DHA bio-enhanced chicken plus supplement DHA Omega-3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "25(OH)D bioenhanced chicken and eggs plus placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Dietary Supplement: DHA/EPA fortified eggs plus Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "non-DHA bio-enhanced eggs plus supplement DHA Omega-3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "non-25(OH)D fortified chicken/eggs plus placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 84,
      "start_date": "2021-12-04",
      "completion_date": "2026-05-30",
      "has_results": false,
      "last_update_posted_date": "2026-04-01",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Ithaca, New York",
      "locations": [
        {
          "city": "Ithaca",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05248737"
    },
    {
      "nct_id": "NCT01600430",
      "title": "Vitamin D Supplementation for Extremely Preterm Infants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Preterm Infants",
        "Bronchopulmonary Dysplasia"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Minute",
        "maximum_age": "7 Days",
        "sex": "ALL",
        "summary": "1 Minute to 7 Days"
      },
      "enrollment_count": 100,
      "start_date": "2012-06",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2017-02-10",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01600430"
    },
    {
      "nct_id": "NCT03313076",
      "title": "Vitamin D and n-3 Polyunsaturated Fatty Acids (PUFAs) to Prevent Chronic Pain Following Major Thermal Burn Injury",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Pain Following Thermal Burn Injury"
      ],
      "interventions": [
        {
          "name": "Omega-3 fatty acids (fish oil)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 (cholecalciferol)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 (cholecalciferol) placebo",
          "type": "DRUG"
        },
        {
          "name": "Omega-3 fatty acid placebo",
          "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": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 24,
      "start_date": "2018-07-19",
      "completion_date": "2020-07-31",
      "has_results": true,
      "last_update_posted_date": "2026-05-08",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03313076"
    },
    {
      "nct_id": "NCT01360476",
      "title": "Vitamin D Therapy to Reduce Cardiac Damage Among Vulnerable Hypertensive Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypertension",
        "Left Ventricular Hypertrophy"
      ],
      "interventions": [
        {
          "name": "cholecalciferol (Vitamin D)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Wayne State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "30 Years to 74 Years"
      },
      "enrollment_count": 354,
      "start_date": "2011-08",
      "completion_date": "2015-11",
      "has_results": false,
      "last_update_posted_date": "2015-12-09",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01360476"
    },
    {
      "nct_id": "NCT04118010",
      "title": "Vitamin D and Prebiotics for Intestinal Health in Cystic Fibrosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Cystic Fibrosis",
        "Dysbiosis"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Inulin",
          "type": "DRUG"
        },
        {
          "name": "Placebo Inulin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2020-03-13",
      "completion_date": "2022-12-31",
      "has_results": true,
      "last_update_posted_date": "2024-02-07",
      "last_synced_at": "2026-09-22T18:54:43.023Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04118010"
    }
  ]
}