{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+plus+calcium",
    "query": {
      "intervention": "Vitamin D plus calcium"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 159,
    "total_pages": 16,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D+plus+calcium&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-22T22:51:37.374Z",
  "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": "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": "2026-09-22T22:51:37.374Z",
      "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": "NCT03424239",
      "title": "Pilot Study for Zoledronic Acid to Prevent Bone Loss After Bariatric Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Bariatric Surgery Candidate"
      ],
      "interventions": [
        {
          "name": "Zoledronic Acid",
          "type": "DRUG"
        },
        {
          "name": "Calcium citrate + vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "25 Years to 100 Years"
      },
      "enrollment_count": 6,
      "start_date": "2018-08-01",
      "completion_date": "2020-01-01",
      "has_results": true,
      "last_update_posted_date": "2021-04-29",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03424239"
    },
    {
      "nct_id": "NCT03994172",
      "title": "Novel Combination Therapy for Osteoporosis in Men",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Male Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Teriparatide or human parathyroid hormone (PTH) 1-34",
          "type": "DRUG"
        },
        {
          "name": "Cinacalcet",
          "type": "DRUG"
        },
        {
          "name": "placebo tablet",
          "type": "DRUG"
        },
        {
          "name": "Calcium citrate tablet",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": "85 Years",
        "sex": "MALE",
        "summary": "60 Years to 85 Years · Male only"
      },
      "enrollment_count": 40,
      "start_date": "2019-07-01",
      "completion_date": "2025-06-30",
      "has_results": true,
      "last_update_posted_date": "2026-09-03",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03994172"
    },
    {
      "nct_id": "NCT01753856",
      "title": "Effects of Teriparatide or Denosumab on Bone in Postmenopausal Women With Osteoporosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Denosumab",
          "type": "DRUG"
        },
        {
          "name": "Demeclocycline",
          "type": "DRUG"
        },
        {
          "name": "Tetracycline",
          "type": "DRUG"
        },
        {
          "name": "Calcium Supplement",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "89 Years",
        "sex": "FEMALE",
        "summary": "55 Years to 89 Years · Female only"
      },
      "enrollment_count": 69,
      "start_date": "2013-01",
      "completion_date": "2014-06",
      "has_results": true,
      "last_update_posted_date": "2015-10-08",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 4,
      "location_summary": "Lakewood, Colorado • Gainesville, Georgia • Detroit, Michigan + 1 more",
      "locations": [
        {
          "city": "Lakewood",
          "state": "Colorado"
        },
        {
          "city": "Gainesville",
          "state": "Georgia"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01753856"
    },
    {
      "nct_id": "NCT00887354",
      "title": "A Study That Will Compare the Effect of Two Drugs on Participants With Low Bone Mass and a Recent Hip Fracture",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Teriparatide",
          "type": "DRUG"
        },
        {
          "name": "Risedronate",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Calcium",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D",
          "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": 224,
      "start_date": "2009-04",
      "completion_date": "2015-08",
      "has_results": true,
      "last_update_posted_date": "2019-09-25",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 6,
      "location_summary": "Fort Lauderdale, Florida • New Port Richey, Florida • Orlando, Florida + 3 more",
      "locations": [
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "New Port Richey",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00887354"
    },
    {
      "nct_id": "NCT00153816",
      "title": "Vitamin D/Calcium Polyp Prevention Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Colorectal Cancer",
        "Polyps",
        "Adenomas"
      ],
      "interventions": [
        {
          "name": "Calcium Carbonate",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Dartmouth-Hitchcock Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "45 Years to 75 Years"
      },
      "enrollment_count": 2813,
      "start_date": "2004-07",
      "completion_date": "2016-06",
      "has_results": true,
      "last_update_posted_date": "2017-03-15",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 10,
      "location_summary": "Los Angeles, California • Denver, Colorado • Atlanta, Georgia + 7 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00153816"
    },
    {
      "nct_id": "NCT06050668",
      "title": "Essential Amino Acid Supplementation for Femoral Fragility Fractures",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Femoral Fracture",
        "Fragility Fracture",
        "Muscle Atrophy"
      ],
      "interventions": [
        {
          "name": "Essential Amino Acid Supplementation",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "Michael C Willey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2024-06-17",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-04-15",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 2,
      "location_summary": "Iowa City, Iowa • Eugene, Oregon",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Eugene",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06050668"
    },
    {
      "nct_id": "NCT02693184",
      "title": "Validation of a Revised Food Frequency Questionnaire",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Osteoporosis",
        "Nutrition"
      ],
      "interventions": [
        {
          "name": "Full length Block 2014 Food Frequency Questionnaire",
          "type": "OTHER"
        },
        {
          "name": "Revised Calcium, Vitamin D and Protein Screener",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 31,
      "start_date": "2016-03-25",
      "completion_date": "2018-06-01",
      "has_results": false,
      "last_update_posted_date": "2023-09-29",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02693184"
    },
    {
      "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": "2026-09-22T22:51:37.374Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03360435"
    },
    {
      "nct_id": "NCT02186535",
      "title": "The Role of Vitamin D in Female Reproductive Tract Immunity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D and Calcium",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "CONRAD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 50 Years · Female only"
      },
      "enrollment_count": 22,
      "start_date": "2014-08",
      "completion_date": "2015-07",
      "has_results": false,
      "last_update_posted_date": "2016-01-08",
      "last_synced_at": "2026-09-22T22:51:37.374Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02186535"
    }
  ]
}