{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+supplementation&page=2",
    "query": {
      "intervention": "Calcium supplementation",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Calcium+supplementation&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-25T08:49:26.423Z",
  "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": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00472823"
    },
    {
      "nct_id": "NCT01375010",
      "title": "Vitamin D HIV Study on Postmenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "HIV"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Vitamin Supplements",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "70 Years",
        "sex": "FEMALE",
        "summary": "40 Years to 70 Years · Female only"
      },
      "enrollment_count": 85,
      "start_date": "2011-01",
      "completion_date": "2016-02",
      "has_results": true,
      "last_update_posted_date": "2019-03-07",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01375010"
    },
    {
      "nct_id": "NCT06749808",
      "title": "A Study to Assess the Impact of a Nutritional Supplement on Wellbeing and Nutrient Absorption",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Nutrition Status"
      ],
      "interventions": [
        {
          "name": "Carotenoid Nutritional Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Pharmanex",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "20 Years to 65 Years"
      },
      "enrollment_count": 36,
      "start_date": "2024-12-01",
      "completion_date": "2025-02",
      "has_results": false,
      "last_update_posted_date": "2024-12-31",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "Provo, Utah",
      "locations": [
        {
          "city": "Provo",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06749808"
    },
    {
      "nct_id": "NCT01141192",
      "title": "The Effect of Vitamin D Supplementation on Glucose Metabolism in Non-Diabetic African American Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 2 Diabetes"
      ],
      "interventions": [
        {
          "name": "vitamin D3, cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Inactive comparator",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Augusta University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "19 Years to 60 Years"
      },
      "enrollment_count": 48,
      "start_date": "2010-01",
      "completion_date": "2010-05",
      "has_results": false,
      "last_update_posted_date": "2010-06-10",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "Augusta, Georgia",
      "locations": [
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01141192"
    },
    {
      "nct_id": "NCT04094688",
      "title": "Vitamin D3 With Chemotherapy and Bevacizumab in Treating Patients With Advanced or Metastatic Colorectal Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Colorectal Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Bevacizumab",
          "type": "DRUG"
        },
        {
          "name": "Oxaliplatin",
          "type": "DRUG"
        },
        {
          "name": "Leucovorin Calcium",
          "type": "DRUG"
        },
        {
          "name": "Fluorouracil",
          "type": "DRUG"
        },
        {
          "name": "Irinotecan Hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "Irinotecan",
          "type": "DRUG"
        },
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT",
        "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": 455,
      "start_date": "2019-10-29",
      "completion_date": "2026-07-01",
      "has_results": true,
      "last_update_posted_date": "2026-03-03",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 1027,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 676 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04094688"
    },
    {
      "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": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "Brea, California",
      "locations": [
        {
          "city": "Brea",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02686905"
    },
    {
      "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": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "Fremont, Nebraska",
      "locations": [
        {
          "city": "Fremont",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01052051"
    },
    {
      "nct_id": "NCT00206388",
      "title": "Zoledronic Acid (ZOMETA) With Cyclophosphamide With Neuroblastoma and Cortical Bone Involvement",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "NEUROBLASTOMA"
      ],
      "interventions": [
        {
          "name": "Zolendric acid",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Baylor College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "Up to 30 Years"
      },
      "enrollment_count": 21,
      "start_date": "2005-04",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2013-08-02",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • San Francisco, California • Stanford, California + 5 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00206388"
    },
    {
      "nct_id": "NCT01263847",
      "title": "Galactooligosaccharide (GOS) Supplementation and Calcium Absorption in Girls",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Galactooligosaccharide",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Purdue University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "12 Years",
        "sex": "FEMALE",
        "summary": "10 Years to 12 Years · Female only"
      },
      "enrollment_count": 31,
      "start_date": "2009-06",
      "completion_date": "2010-07",
      "has_results": false,
      "last_update_posted_date": "2018-05-09",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "West Lafayette, Indiana",
      "locations": [
        {
          "city": "West Lafayette",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01263847"
    },
    {
      "nct_id": "NCT04850222",
      "title": "Fluoxetine Mitigation Mental Health Study for Patients With Musculoskeletal Trauma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Musculoskeletal Injury"
      ],
      "interventions": [
        {
          "name": "Fluoxetine",
          "type": "DRUG"
        },
        {
          "name": "Calcium",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 55,
      "start_date": "2021-09-01",
      "completion_date": "2025-02-17",
      "has_results": true,
      "last_update_posted_date": "2026-05-14",
      "last_synced_at": "2026-09-25T08:49:26.423Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04850222"
    }
  ]
}