{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Dietary+Deficiency&page=21",
    "query": {
      "condition": "Dietary Deficiency",
      "page": 21
    },
    "page_size": 10
  },
  "pagination": {
    "page": 21,
    "page_size": 10,
    "total_count": 604,
    "total_pages": 61,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Dietary+Deficiency&page=22&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Dietary+Deficiency&page=20&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-22T18:28:13.672Z",
  "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": "NCT02166333",
      "title": "Study To Understand Fall Reduction and Vitamin D in You",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Falls"
      ],
      "interventions": [
        {
          "name": "200 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "1000 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "2000 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "4000 IU/d cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "70 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "70 Years and older"
      },
      "enrollment_count": 688,
      "start_date": "2015-06-30",
      "completion_date": "2019-06-07",
      "has_results": true,
      "last_update_posted_date": "2021-05-14",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland • Hagerstown, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Hagerstown",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02166333"
    },
    {
      "nct_id": "NCT01419743",
      "title": "Effect of Vitamin D Supplementation on In-vitro Fertilization (IVF) Outcomes",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Infertility",
        "Vitamin D Deficiency"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "38 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 38 Years · Female only"
      },
      "enrollment_count": 102,
      "start_date": "2011-08",
      "completion_date": "2014-01",
      "has_results": false,
      "last_update_posted_date": "2014-02-19",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 3,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01419743"
    },
    {
      "nct_id": "NCT00494104",
      "title": "Prevention of Vitamin D Deficiency",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D drops, 200 or 400 or 600 IU/day or 800 IU/day",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Weeks",
        "maximum_age": "5 Weeks",
        "sex": "ALL",
        "summary": "3 Weeks to 5 Weeks"
      },
      "enrollment_count": 398,
      "start_date": "2006-09",
      "completion_date": "2011-09",
      "has_results": false,
      "last_update_posted_date": "2012-12-18",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 1,
      "location_summary": "Coralville, Iowa",
      "locations": [
        {
          "city": "Coralville",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00494104"
    },
    {
      "nct_id": "NCT00327847",
      "title": "Optimizing Vitamin D Nutrition in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Oral Vitamin D Supplementation",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Winthrop University Hospital",
      "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": 150,
      "start_date": "2004-12",
      "completion_date": "2006-12",
      "has_results": false,
      "last_update_posted_date": "2008-09-25",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 1,
      "location_summary": "Mineola, New York",
      "locations": [
        {
          "city": "Mineola",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00327847"
    },
    {
      "nct_id": "NCT03611049",
      "title": "Improving Functionality in Older People",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "High dose Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Low dose Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Texas Tech University Health Sciences Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "65 Years to 89 Years"
      },
      "enrollment_count": 14,
      "start_date": "2018-08-01",
      "completion_date": "2019-07-19",
      "has_results": false,
      "last_update_posted_date": "2019-07-23",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 1,
      "location_summary": "Lubbock, Texas",
      "locations": [
        {
          "city": "Lubbock",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03611049"
    },
    {
      "nct_id": "NCT01292395",
      "title": "Effects of Dietary Protein on Musculoskeletal Health During Calorie Deficiency",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight Loss",
        "Muscle Loss",
        "Bone Loss"
      ],
      "interventions": [
        {
          "name": "Dietary Protein Intake",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "United States Army Research Institute of Environmental Medicine",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "42 Years",
        "sex": "ALL",
        "summary": "18 Years to 42 Years"
      },
      "enrollment_count": 42,
      "start_date": "2010-09",
      "completion_date": "2011-11",
      "has_results": false,
      "last_update_posted_date": "2017-08-14",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 1,
      "location_summary": "Grand Forks, North Dakota",
      "locations": [
        {
          "city": "Grand Forks",
          "state": "North Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01292395"
    },
    {
      "nct_id": "NCT02526160",
      "title": "Study of KRN23 in Adults With X-linked Hypophosphatemia (XLH)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "X-linked Hypophosphatemia"
      ],
      "interventions": [
        {
          "name": "burosumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Kyowa Kirin, Inc.",
      "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": 134,
      "start_date": "2015-10-22",
      "completion_date": "2018-12-06",
      "has_results": true,
      "last_update_posted_date": "2024-06-18",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • San Francisco, California • New Haven, Connecticut + 5 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02526160"
    },
    {
      "nct_id": "NCT07876843",
      "title": "The Effectiveness of a Weight-dependent Algorithm for Dosing Vitamin D.",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypovitaminosis D"
      ],
      "interventions": [
        {
          "name": "Vitamin D3, Calcium, and Vitamin C",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Atlantic Health System",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "6 Years to 21 Years"
      },
      "enrollment_count": 200,
      "start_date": "2027-01-01",
      "completion_date": "2032-01-01",
      "has_results": false,
      "last_update_posted_date": "2026-10-20",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 1,
      "location_summary": "Morristown, New Jersey",
      "locations": [
        {
          "city": "Morristown",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07876843"
    },
    {
      "nct_id": "NCT01709474",
      "title": "Vitamin D3 Treatment in Pediatric Systemic Lupus Erythematosus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Systemic Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "Vitamin D3 6000 IU",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3 400 IU",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "20 Years",
        "sex": "ALL",
        "summary": "5 Years to 20 Years"
      },
      "enrollment_count": 7,
      "start_date": "2013-06",
      "completion_date": "2014-07",
      "has_results": true,
      "last_update_posted_date": "2015-12-17",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 13,
      "location_summary": "Los Angeles, California • Palo Alto, California • San Francisco, California + 9 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01709474"
    },
    {
      "nct_id": "NCT01068418",
      "title": "Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Vitamin D Deficiency",
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Vitamin D (cholecalciferol)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 26,
      "start_date": "2010-02",
      "completion_date": "2011-09",
      "has_results": true,
      "last_update_posted_date": "2017-03-30",
      "last_synced_at": "2026-10-22T18:28:13.672Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01068418"
    }
  ]
}