{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Biological+Markers&page=2",
    "query": {
      "condition": "Biological Markers",
      "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?condition=Biological+Markers&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T18:54:29.755Z",
  "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": "NCT01687153",
      "title": "A Study of Brain Aging in Vietnam War Veterans",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Traumatic Brain Injury",
        "Post Traumatic Stress Disorder",
        "Alzheimer's Disease",
        "Mild Cognitive Impairment"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Southern California",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "50 Years to 90 Years"
      },
      "enrollment_count": 289,
      "start_date": "2012-10",
      "completion_date": "2021-09-21",
      "has_results": false,
      "last_update_posted_date": "2021-11-29",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 19,
      "location_summary": "Sun City, Arizona • Irvine, California • La Jolla, California + 14 more",
      "locations": [
        {
          "city": "Sun City",
          "state": "Arizona"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01687153"
    },
    {
      "nct_id": "NCT06086145",
      "title": "Biomarker-estimated Flavanol Intake in Davis (FID)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy",
        "Diet",
        "Adults"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "25 Years to 75 Years"
      },
      "enrollment_count": 200,
      "start_date": "2023-11-02",
      "completion_date": "2026-06",
      "has_results": false,
      "last_update_posted_date": "2026-05-07",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06086145"
    },
    {
      "nct_id": "NCT05762679",
      "title": "Quantifying Myofascial Dysfunction in Post-Stroke Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Myofascial Dysfunction"
      ],
      "interventions": [
        {
          "name": "Imaging",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 46,
      "start_date": "2023-02-28",
      "completion_date": "2024-05-24",
      "has_results": true,
      "last_update_posted_date": "2025-07-09",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05762679"
    },
    {
      "nct_id": "NCT01233479",
      "title": "Biomarkers in Blood Samples From Young Patients With Newly Diagnosed Brain Tumors Undergoing Standard Radiation Therapy and Chemotherapy",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Brain and Central Nervous System Tumors"
      ],
      "interventions": [
        {
          "name": "systemic chemotherapy",
          "type": "DRUG"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "therapeutic surgical procedure",
          "type": "PROCEDURE"
        },
        {
          "name": "radiation therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER",
        "PROCEDURE",
        "RADIATION"
      ],
      "sponsor": "Pediatric Brain Tumor Consortium",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "4 Years to 21 Years"
      },
      "enrollment_count": 0,
      "start_date": "2010-05",
      "completion_date": "2017-08-24",
      "has_results": false,
      "last_update_posted_date": "2019-04-01",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 11,
      "location_summary": "Los Angeles, California • Palo Alto, California • Washington D.C., District of Columbia + 8 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01233479"
    },
    {
      "nct_id": "NCT02455388",
      "title": "d13C Added Sugar Intake Biomarker: Determining Validity in Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Validation Studies"
      ],
      "interventions": [
        {
          "name": "High added sugar diet",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Low added sugar diet",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Virginia Polytechnic Institute and State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "6 Years to 18 Years"
      },
      "enrollment_count": 370,
      "start_date": "2014-04",
      "completion_date": "2018-02",
      "has_results": true,
      "last_update_posted_date": "2019-02-26",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 1,
      "location_summary": "Blacksburg, Virginia",
      "locations": [
        {
          "city": "Blacksburg",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02455388"
    },
    {
      "nct_id": "NCT07527286",
      "title": "The Effects of a Postbiotic Supplement on Biomarkers of Gut Health",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Gastrointestinal",
        "Microbiota Balance",
        "Microbiota",
        "Cortisol",
        "Butyrate",
        "Bloating",
        "Gastrointestinal Upset",
        "Immuno-modulation"
      ],
      "interventions": [
        {
          "name": "Postbiotic",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Verb Biotics LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 76,
      "start_date": "2024-11-05",
      "completion_date": "2025-04-26",
      "has_results": false,
      "last_update_posted_date": "2026-04-14",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 1,
      "location_summary": "Canfield, Ohio",
      "locations": [
        {
          "city": "Canfield",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07527286"
    },
    {
      "nct_id": "NCT01067586",
      "title": "Novel Determinants and Measures of Smokeless Tobacco Use: Study 1",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Smokeless Tobacco Use",
        "Tobacco Dependence"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 359,
      "start_date": "2010-02",
      "completion_date": "2013-04",
      "has_results": true,
      "last_update_posted_date": "2022-12-22",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 3,
      "location_summary": "Minneapolis, Minnesota • Eugene, Oregon • Morgantown, West Virginia",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Eugene",
          "state": "Oregon"
        },
        {
          "city": "Morgantown",
          "state": "West Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01067586"
    },
    {
      "nct_id": "NCT01582139",
      "title": "Feasibility Study of Closed Loop Control in Type 1 Diabetes Using Heart Rate Monitoring as an Exercise Marker",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 1 Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "Heart rate informed SSM+HMM",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Virginia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "21 Years to 65 Years"
      },
      "enrollment_count": 12,
      "start_date": "2012-05",
      "completion_date": "2012-08",
      "has_results": true,
      "last_update_posted_date": "2014-08-15",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 1,
      "location_summary": "Charlottesville, Virginia",
      "locations": [
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01582139"
    },
    {
      "nct_id": "NCT04579874",
      "title": "Clinical Performance of LIVERFASt Test Compared w/ Liver Biopsy in Patients w/ NAFLD.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Non-Alcoholic Fatty Liver Disease",
        "Non-Alcoholic Steatohepatitis",
        "Liver Fibroses",
        "Liver Inflammation",
        "Liver Steatoses"
      ],
      "interventions": [
        {
          "name": "LIVERFASt",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Fibronostics USA, Inc",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 241,
      "start_date": "2021-01-07",
      "completion_date": "2022-04-15",
      "has_results": false,
      "last_update_posted_date": "2022-08-02",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 8,
      "location_summary": "Detroit, Michigan • St Louis, Missouri • Manhasset, New York + 3 more",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Manhasset",
          "state": "New York"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04579874"
    },
    {
      "nct_id": "NCT05047588",
      "title": "Added Sugar Intake, Sweet Taste Phenotypes and Biomarkers",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Monell Chemical Senses Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "3 Years to 70 Years"
      },
      "enrollment_count": 277,
      "start_date": "2019-08-29",
      "completion_date": "2022-09-01",
      "has_results": false,
      "last_update_posted_date": "2023-02-03",
      "last_synced_at": "2026-07-22T18:54:29.755Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05047588"
    }
  ]
}