{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Calcium+Deficiency",
    "query": {
      "condition": "Calcium Deficiency"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 101,
    "total_pages": 11,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Calcium+Deficiency&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-21T20:00:45.253Z",
  "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": "NCT00508885",
      "title": "The Effect of Oral Niacinamide on Plasma Phosphorus Levels in Peritoneal Dialysis Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Hyperphosphatemia"
      ],
      "interventions": [
        {
          "name": "Niacinamide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 17,
      "start_date": "2006-10",
      "completion_date": "2007-07",
      "has_results": false,
      "last_update_posted_date": "2007-07-30",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00508885"
    },
    {
      "nct_id": "NCT06826391",
      "title": "Using Calcium Hydroxylapatite To Treat Gum Recession and Tooth Hypersensitivity",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Gingival Recession, Generalized",
        "Gingival Recession Generalized Moderate",
        "Gingival Recession Localized Moderate",
        "Tooth Sensitivity"
      ],
      "interventions": [
        {
          "name": "Calcium hydroxylapatite",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "American Academy of Facial Esthetics",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "20 Years to 70 Years"
      },
      "enrollment_count": 500,
      "start_date": "2025-02-01",
      "completion_date": "2025-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-02-17",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "South Euclid, Ohio",
      "locations": [
        {
          "city": "South Euclid",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06826391"
    },
    {
      "nct_id": "NCT00859612",
      "title": "Renal Osteodystrophy: A Fresh Approach",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Renal Osteodystrophy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Hartmut Malluche, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 464,
      "start_date": "2009-03",
      "completion_date": "2014-02",
      "has_results": false,
      "last_update_posted_date": "2017-05-05",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "Lexington, Kentucky",
      "locations": [
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00859612"
    },
    {
      "nct_id": "NCT03747523",
      "title": "Pilot Study: The Effect of Ergocalciferol on Plasma Mucin-1 Levels",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Ergocalciferol"
      ],
      "interventions": [
        {
          "name": "Ergocalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "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": 44,
      "start_date": "2019-03-12",
      "completion_date": "2020-01-27",
      "has_results": false,
      "last_update_posted_date": "2020-10-29",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03747523"
    },
    {
      "nct_id": "NCT02233322",
      "title": "Iron Therapy for Autosomal Dominant Hypophosphatemic Rickets: A Pilot Project.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Autosomal Dominant Hypophosphatemic Rickets"
      ],
      "interventions": [
        {
          "name": "Iron",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Months",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "25 Months and older"
      },
      "enrollment_count": 8,
      "start_date": "2014-08",
      "completion_date": "2019-11-12",
      "has_results": false,
      "last_update_posted_date": "2019-11-14",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02233322"
    },
    {
      "nct_id": "NCT01050387",
      "title": "Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "6 Months to 6 Years"
      },
      "enrollment_count": 193,
      "start_date": "2010-01",
      "completion_date": "2013-02",
      "has_results": false,
      "last_update_posted_date": "2014-08-05",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01050387"
    },
    {
      "nct_id": "NCT05509595",
      "title": "Burosumab for Fibroblast Growth Factor-23 Mediated Hypophosphatemia in Fibrous Dysplasia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Fibrous Dysplasia Of Bone"
      ],
      "interventions": [
        {
          "name": "Burosumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Dental and Craniofacial Research (NIDCR)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "1 Year to 99 Years"
      },
      "enrollment_count": 12,
      "start_date": "2022-12-07",
      "completion_date": "2024-11-18",
      "has_results": true,
      "last_update_posted_date": "2026-02-02",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05509595"
    },
    {
      "nct_id": "NCT01971411",
      "title": "Vitamin D Deficiency in Elderly African American Women in Central Texas",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Vitamin D Deficiency",
        "Osteoporosis",
        "Osteopenia"
      ],
      "interventions": [
        {
          "name": "Calcium 500mg with 200 IU Vitamin D - 2 tablets daily",
          "type": "DRUG"
        },
        {
          "name": "Blood levels of Vitamin D, Serum CTX, Mg, Ca++ and iPTH",
          "type": "PROCEDURE"
        },
        {
          "name": "Usual sun exposure documentation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Dietary intake of calcium, vitamin D, magnesium",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "McLennan County Medical Education and Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "70 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "70 Years and older · Female only"
      },
      "enrollment_count": 60,
      "start_date": "2006-03",
      "completion_date": "2007-05",
      "has_results": false,
      "last_update_posted_date": "2018-03-30",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "Waco, Texas",
      "locations": [
        {
          "city": "Waco",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01971411"
    },
    {
      "nct_id": "NCT06525636",
      "title": "A First-in-human Study of KK8123 in Adults With X-linked Hypophosphatemia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "X-linked Hypophosphatemia"
      ],
      "interventions": [
        {
          "name": "KK8123",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Kyowa Kirin Co., Ltd.",
      "sponsor_class": "INDUSTRY",
      "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": "2024-10-09",
      "completion_date": "2028-05-10",
      "has_results": false,
      "last_update_posted_date": "2025-11-14",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 5,
      "location_summary": "San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06525636"
    },
    {
      "nct_id": "NCT00001151",
      "title": "Studies With 1,25-Dihydroxycholecalciferol",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypocalcemia",
        "Rickets"
      ],
      "interventions": [
        {
          "name": "1,25-Dihydroxycholecalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 6,
      "start_date": "1976-03",
      "completion_date": "2009-10",
      "has_results": true,
      "last_update_posted_date": "2013-11-25",
      "last_synced_at": "2026-07-21T20:00:45.253Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001151"
    }
  ]
}