{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+and+calcium+supplementation",
    "query": {
      "intervention": "Vitamin D and calcium supplementation"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 45,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+and+calcium+supplementation&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-05T00:22:11.266Z",
  "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": "NCT02686905",
      "title": "Vitamin Supplementation After Bariatric Surgery",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Complications of Bariatric Procedures",
        "Avitaminosis"
      ],
      "interventions": [
        {
          "name": "Chewable Multivitamin with Iron",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PatchMD Vitamin D3/Calcium Patch",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PatchMD Multivitamin Patch",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "PatchMD B12 Energy Plus Patch",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Chewable Calcium",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Quick Dissolve B12",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "California State Polytechnic University, Pomona",
      "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": "2016-01",
      "completion_date": "2017-06",
      "has_results": false,
      "last_update_posted_date": "2016-09-30",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "Brea, California",
      "locations": [
        {
          "city": "Brea",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02686905"
    },
    {
      "nct_id": "NCT02172651",
      "title": "Vitamin D in Patients With Stage I-III Colon Cancer or Resectable Colon Cancer Liver Metastases",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Stage, Colon Cancer",
        "Stage I-III Colon Cancer",
        "Stage IV Colon Cancer With Resectable Liver Metastases"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Dana-Farber Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 80,
      "start_date": "2014-07-14",
      "completion_date": "2027-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02172651"
    },
    {
      "nct_id": "NCT01052051",
      "title": "Clinical Trial of Vitamin D3 to Reduce Cancer Risk in Postmenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Cancer"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Calcium carbonate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Creighton University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "55 Years and older · Female only"
      },
      "enrollment_count": 2303,
      "start_date": "2009-06",
      "completion_date": "2015-08",
      "has_results": false,
      "last_update_posted_date": "2019-07-24",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "Fremont, Nebraska",
      "locations": [
        {
          "city": "Fremont",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01052051"
    },
    {
      "nct_id": "NCT01473602",
      "title": "Second Study of the Effect of Teriparatide on Hip Fracture Healing",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Femur Neck Fracture"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium supplementation",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D supplementation",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 39,
      "start_date": "2012-01",
      "completion_date": "2013-11",
      "has_results": true,
      "last_update_posted_date": "2015-04-16",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 19,
      "location_summary": "San Diego, California • Golden, Colorado • Washington D.C., District of Columbia + 16 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Golden",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Gainesville",
          "state": "Georgia"
        },
        {
          "city": "Morton Grove",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01473602"
    },
    {
      "nct_id": "NCT03360435",
      "title": "Absorption of Transdermal Vitamins in Post Bariatric Surgery Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bariatric Surgery Candidate",
        "Vitamin Deficiency",
        "Mineral Deficiency"
      ],
      "interventions": [
        {
          "name": "Patch MD MultiVitamin Plus patch",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 99,
      "start_date": "2017-12-15",
      "completion_date": "2021-07-07",
      "has_results": false,
      "last_update_posted_date": "2021-07-09",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03360435"
    },
    {
      "nct_id": "NCT00857831",
      "title": "Vitamin D and Calcium Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spinal Cord Injury"
      ],
      "interventions": [
        {
          "name": "Vitamin D and Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "US Department of Veterans Affairs",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 10,
      "start_date": "2008-01",
      "completion_date": "2012-08",
      "has_results": false,
      "last_update_posted_date": "2012-10-03",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00857831"
    },
    {
      "nct_id": "NCT01323608",
      "title": "The Effect of Vitamin D Supplementation on Calcium Excretion in Thalassemia: a Dose Response Study",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Thalassemia Major"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "6 Years to 60 Years"
      },
      "enrollment_count": 40,
      "start_date": "2011-06",
      "completion_date": "2014-12",
      "has_results": false,
      "last_update_posted_date": "2011-04-19",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01323608"
    },
    {
      "nct_id": "NCT00873925",
      "title": "Cord Blood Plus Vitamin D and Omega 3s in T1D",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Type 1 Diabetes"
      ],
      "interventions": [
        {
          "name": "Autologous UCB",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Omega 3 FA",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "1 Year to 18 Years"
      },
      "enrollment_count": 15,
      "start_date": "2009-03",
      "completion_date": "2012-10",
      "has_results": false,
      "last_update_posted_date": "2013-04-04",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00873925"
    },
    {
      "nct_id": "NCT01473589",
      "title": "Effect of Teriparatide on Hip Fracture Healing",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Femur Neck Fracture"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium supplementation",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D supplementation",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 122,
      "start_date": "2012-02",
      "completion_date": "2013-12",
      "has_results": true,
      "last_update_posted_date": "2015-04-16",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 24,
      "location_summary": "Phoenix, Arizona • Tucson, Arizona • La Mesa, California + 21 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "La Mesa",
          "state": "California"
        },
        {
          "city": "Laguna Hills",
          "state": "California"
        },
        {
          "city": "Lancaster",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01473589"
    },
    {
      "nct_id": "NCT07760948",
      "title": "HMB Plus Vitamin D to Preserve Muscle in Older Adults Starting Semaglutide",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Type 2 Diabetes Mellitus (T2DM)",
        "Sarcopenia",
        "Obesity",
        "Muscle Loss",
        "Older Adults"
      ],
      "interventions": [
        {
          "name": "Calcium-HMB Plus Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Matching placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "65 Years to 85 Years"
      },
      "enrollment_count": 90,
      "start_date": "2026-12-01",
      "completion_date": "2030-11",
      "has_results": false,
      "last_update_posted_date": "2026-08-28",
      "last_synced_at": "2026-10-05T00:22:11.266Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07760948"
    }
  ]
}