{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Stable+isotopes",
    "query": {
      "intervention": "Stable isotopes"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 115,
    "total_pages": 12,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Stable+isotopes&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-05T17:21:42.858Z",
  "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": "NCT01890811",
      "title": "Chronic Kidney Disease in Relation to Alterations in Protein and Amino Acid Metabolism and Function",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Kidney Failure"
      ],
      "interventions": [
        {
          "name": "Boost High Protein",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2013-06",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2015-05-01",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01890811"
    },
    {
      "nct_id": "NCT00828451",
      "title": "Collaborative Research Group for Necrotizing Enterocolitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Prematurity",
        "Necrotizing Enterocolitis"
      ],
      "interventions": [
        {
          "name": "[5,5,5-2H3]leucine (stable isotope labeled leucine)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "7 Days",
        "sex": "ALL",
        "summary": "1 Day to 7 Days"
      },
      "enrollment_count": 29,
      "start_date": "2008-05",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2018-04-04",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00828451"
    },
    {
      "nct_id": "NCT02780219",
      "title": "Chronic Obstructive Pulmonary Disorder and Acute Exercise",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pulmonary Disease, Chronic Obstructive"
      ],
      "interventions": [
        {
          "name": "stable amino acid infusion",
          "type": "OTHER"
        },
        {
          "name": "acute exercise with amino acid infusion",
          "type": "OTHER"
        },
        {
          "name": "24-hour post exercise amino acid infusion",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "45 Years and older"
      },
      "enrollment_count": 57,
      "start_date": "2016-02-04",
      "completion_date": "2020-03-06",
      "has_results": false,
      "last_update_posted_date": "2025-02-03",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02780219"
    },
    {
      "nct_id": "NCT03457701",
      "title": "Anemia Studies in CKD: Erythropoiesis Via a Novel Prolyl Hydroxylase Inhibitor (PHI) Daprodustat- Iron (ASCEND: Fe)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Anaemia"
      ],
      "interventions": [
        {
          "name": "Daprodustat",
          "type": "DRUG"
        },
        {
          "name": "rhEPO",
          "type": "DRUG"
        },
        {
          "name": "Ferrous sulfate containing the stable iron isotope (57Fe)",
          "type": "DRUG"
        },
        {
          "name": "Ferrous sulfate containing the stable iron isotope (58Fe)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 15,
      "start_date": "2019-07-30",
      "completion_date": "2022-07-05",
      "has_results": true,
      "last_update_posted_date": "2024-03-27",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 3,
      "location_summary": "Fort Worth, Texas • Lufkin, Texas • San Antonio, Texas",
      "locations": [
        {
          "city": "Fort Worth",
          "state": "Texas"
        },
        {
          "city": "Lufkin",
          "state": "Texas"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03457701"
    },
    {
      "nct_id": "NCT00675714",
      "title": "Assessment of the Treatment of Severely Burned With Anabolic Agents on Clinical Outcomes, Recovery and Rehabilitation",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Burns"
      ],
      "interventions": [
        {
          "name": "Stable Isotope Infusion Study",
          "type": "PROCEDURE"
        },
        {
          "name": "Collection of blood and tissues",
          "type": "PROCEDURE"
        },
        {
          "name": "Radiology testing: Dual-energy X-ray absorptiometry (DEXA), ultrasound, MRI",
          "type": "PROCEDURE"
        },
        {
          "name": "Humatrope",
          "type": "DRUG"
        },
        {
          "name": "Ketoconazole",
          "type": "DRUG"
        },
        {
          "name": "Oxandrolone",
          "type": "DRUG"
        },
        {
          "name": "Propranolol",
          "type": "DRUG"
        },
        {
          "name": "Oxandrolone and propranolol combined",
          "type": "DRUG"
        },
        {
          "name": "Humatrope and propranolol combined",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Exercise--Hospital supervised intensive exercise program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Home exercise program",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "The University of Texas Medical Branch, Galveston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "Up to 80 Years"
      },
      "enrollment_count": 1126,
      "start_date": "2004-01",
      "completion_date": "2019-07-15",
      "has_results": false,
      "last_update_posted_date": "2019-11-29",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "Galveston, Texas",
      "locations": [
        {
          "city": "Galveston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00675714"
    },
    {
      "nct_id": "NCT04933656",
      "title": "Use of Stable Carbon And Nitrogen Isotopes to Improve Dietary Assessment for Cardiovascular Disease",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy Adults"
      ],
      "interventions": [
        {
          "name": "one 24 hr cycle of meals at a 2000 kcal level",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "one 24 hr cycle of meals at a 2000 kcal level + one serving sugar sweetened beverage",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "one 24 hr cycle of meals at a 2000 kcal level + two servings sugar sweetened beverage",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "one 24 hr cycle of meals at a 2000 kcal level + three serving sugar sweetened beverage",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "21 Years to 74 Years"
      },
      "enrollment_count": 0,
      "start_date": "2021-08",
      "completion_date": "2022-02",
      "has_results": false,
      "last_update_posted_date": "2026-01-26",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04933656"
    },
    {
      "nct_id": "NCT04799301",
      "title": "Developing Biomarkers of Dietary Intake: Dose Dependent Measurement of Sugar Intake",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Diet Therapy",
        "Healthy Volunteers"
      ],
      "interventions": [
        {
          "name": "Diet with no soda",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Diet with 50% of carb intake from soda",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Diet with 20% of carb intake from soda",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 60,
      "start_date": "2022-02-23",
      "completion_date": "2028-01-01",
      "has_results": false,
      "last_update_posted_date": "2026-09-14",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04799301"
    },
    {
      "nct_id": "NCT02937350",
      "title": "Clearance of 25-hydroxyvitamin D in Chronic Kidney Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "D6-25-hydroxyvitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 88,
      "start_date": "2017-03-01",
      "completion_date": "2021-01-01",
      "has_results": true,
      "last_update_posted_date": "2021-09-01",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02937350"
    },
    {
      "nct_id": "NCT03632876",
      "title": "Nutritional Outcomes After Vitamin A Supplementation in Subjects With SCD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sickle Cell Anemia in Children",
        "Vitamin A Deficiency in Children"
      ],
      "interventions": [
        {
          "name": "retinyl palmitate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Children's Hospital of Philadelphia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "9 Years and older"
      },
      "enrollment_count": 42,
      "start_date": "2015-10-02",
      "completion_date": "2016-09-30",
      "has_results": false,
      "last_update_posted_date": "2018-08-16",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03632876"
    },
    {
      "nct_id": "NCT02757638",
      "title": "Omics Profiling of Weight Loss With Bariatric Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Surgery"
      ],
      "interventions": [
        {
          "name": "Stable isotope infusion",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 7,
      "start_date": "2016-02-25",
      "completion_date": "2018-06-29",
      "has_results": false,
      "last_update_posted_date": "2025-09-30",
      "last_synced_at": "2026-10-05T17:21:42.858Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02757638"
    }
  ]
}