{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=400+IU+Vitamin+D3+%28cholecalciferol%29&page=2",
    "query": {
      "intervention": "400 IU Vitamin D3 (cholecalciferol)",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 84,
    "total_pages": 9,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=400+IU+Vitamin+D3+%28cholecalciferol%29&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=400+IU+Vitamin+D3+%28cholecalciferol%29&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-11T21:39:54.151Z",
  "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": "NCT00472823",
      "title": "Vitamin D Supplementation in Older Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteoporosis",
        "Aging"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium Citrate (Citracal)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Creighton University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "57 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "57 Years and older · Female only"
      },
      "enrollment_count": 273,
      "start_date": "2007-04",
      "completion_date": "2011-08",
      "has_results": false,
      "last_update_posted_date": "2016-03-14",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00472823"
    },
    {
      "nct_id": "NCT01490333",
      "title": "Sunweavers: Supporting Native American Women's Vitamin D Research",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Cardiovascular Diseases"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "55 Years to 75 Years · Female only"
      },
      "enrollment_count": 99,
      "start_date": "2011-07",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2014-11-20",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 3,
      "location_summary": "Bowler, Wisconsin • Lac du Flambeau, Wisconsin • Madison, Wisconsin",
      "locations": [
        {
          "city": "Bowler",
          "state": "Wisconsin"
        },
        {
          "city": "Lac du Flambeau",
          "state": "Wisconsin"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01490333"
    },
    {
      "nct_id": "NCT00145704",
      "title": "Study of Adults With Low Growth Hormone Who Survived Childhood Cancer Where Treatment Caused Low Bone Density",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteopenia"
      ],
      "interventions": [
        {
          "name": "bisphosphonate therapy (risedronate)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "State University of New York - Upstate Medical University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 6,
      "start_date": "2002-06",
      "completion_date": "2008-10",
      "has_results": true,
      "last_update_posted_date": "2013-04-08",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Syracuse, New York",
      "locations": [
        {
          "city": "Syracuse",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00145704"
    },
    {
      "nct_id": "NCT00436475",
      "title": "Vitamin D and Calcium Homeostasis for Prevention of Type 2 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Glucose Intolerance",
        "Type 2 Diabetes Mellitus",
        "Metabolic Syndrome"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 2,000 IU orally once daily",
          "type": "DRUG"
        },
        {
          "name": "Calcium Carbonate 400 mg orally twice daily",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3-Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium-Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Tufts Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 92,
      "start_date": "2007-09",
      "completion_date": "2009-11",
      "has_results": true,
      "last_update_posted_date": "2019-07-30",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00436475"
    },
    {
      "nct_id": "NCT06250283",
      "title": "Resveratrol for the Prevention of Bone Loss in Postmenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Low Bone Mass"
      ],
      "interventions": [
        {
          "name": "Resveratrol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Delaware",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 52,
      "start_date": "2024-02-02",
      "completion_date": "2026-01-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Newark, Delaware",
      "locations": [
        {
          "city": "Newark",
          "state": "Delaware"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06250283"
    },
    {
      "nct_id": "NCT02758990",
      "title": "Interventional Testing of Gene-environment Interactions Via the Verifomics Mobile Application",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Rhinitis",
        "Rhinitis, Allergic",
        "Respiratory Sounds",
        "Dyspnea",
        "Headache",
        "Migraine Disorders",
        "Arthritis",
        "Arthralgia",
        "Anxiety",
        "Sleep Initiation and Maintenance Disorders",
        "Sleep Deprivation"
      ],
      "interventions": [
        {
          "name": "Vitamin A",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin B6",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin C",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Nicotinamide",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin E",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Broccoli",
          "type": "OTHER"
        },
        {
          "name": "Spinach",
          "type": "OTHER"
        },
        {
          "name": "Caffeine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Coffee",
          "type": "OTHER"
        },
        {
          "name": "Axon Eyewear",
          "type": "DEVICE"
        },
        {
          "name": "Chocolate",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER",
        "DEVICE"
      ],
      "sponsor": "Verifomics LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 16,
      "start_date": "2016-03",
      "completion_date": "2016-11-23",
      "has_results": false,
      "last_update_posted_date": "2017-10-02",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02758990"
    },
    {
      "nct_id": "NCT01417351",
      "title": "Effects of Vitamin D Supplementation During Pregnancy on Clinical Outcomes and Immune Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "400 IU vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "2,000 IU Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "USDA, Western Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 60,
      "start_date": "2010-08",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2013-07-23",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 2,
      "location_summary": "Davis, California • Sacramento, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01417351"
    },
    {
      "nct_id": "NCT00621257",
      "title": "Vitamin D Levels in Children With IBD",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Inflammatory Bowel Disease",
        "Crohn's Disease",
        "Ulcerative Colitis"
      ],
      "interventions": [
        {
          "name": "ergocalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Boston Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "5 Years to 21 Years"
      },
      "enrollment_count": 134,
      "start_date": "2008-01",
      "completion_date": "2011-03",
      "has_results": true,
      "last_update_posted_date": "2017-03-22",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00621257"
    },
    {
      "nct_id": "NCT01394484",
      "title": "Dairy Foods Compared to Dietary Supplements and Bone Health",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Osteoporosis",
        "Bone Loss",
        "Osteopenia"
      ],
      "interventions": [
        {
          "name": "Intervention I",
          "type": "OTHER"
        },
        {
          "name": "Intervention II",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "USDA, Western Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "50 Years to 65 Years · Female only"
      },
      "enrollment_count": 12,
      "start_date": "2010-12",
      "completion_date": "2013-02",
      "has_results": false,
      "last_update_posted_date": "2013-02-26",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01394484"
    },
    {
      "nct_id": "NCT00921557",
      "title": "Safety and Effectiveness of Alendronate for Bone Mineral Density in HIV-infected Children and Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "HIV Infection"
      ],
      "interventions": [
        {
          "name": "Alendronate",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium carbonate/vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "24 Years",
        "sex": "ALL",
        "summary": "11 Years to 24 Years"
      },
      "enrollment_count": 52,
      "start_date": "2009-11",
      "completion_date": "2017-01",
      "has_results": true,
      "last_update_posted_date": "2021-11-05",
      "last_synced_at": "2026-10-11T21:39:54.151Z",
      "location_count": 7,
      "location_summary": "Los Angeles, California • Miami, Florida • Tampa, Florida + 4 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00921557"
    }
  ]
}