{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Leucine",
    "query": {
      "intervention": "Leucine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 105,
    "total_pages": 11,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Leucine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-02T17:42:11.576Z",
  "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": "NCT00828243",
      "title": "Genetic Regulation of Surfactant Deficiency",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Respiratory Distress Syndrome, Newborn"
      ],
      "interventions": [
        {
          "name": "Nutrient",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "6 Months",
        "sex": "ALL",
        "summary": "1 Day to 6 Months"
      },
      "enrollment_count": 525,
      "start_date": "2007-11",
      "completion_date": "2013-03",
      "has_results": false,
      "last_update_posted_date": "2021-06-07",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00828243"
    },
    {
      "nct_id": "NCT06535698",
      "title": "Evaluating the Effect of a Supplement on Symptoms of Hormonal Imbalance.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Women's Health"
      ],
      "interventions": [
        {
          "name": "Perelel Health Hormonal Balance Support",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Perelel Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 35,
      "start_date": "2024-02-19",
      "completion_date": "2024-06-10",
      "has_results": false,
      "last_update_posted_date": "2024-08-02",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 1,
      "location_summary": "Santa Monica, California",
      "locations": [
        {
          "city": "Santa Monica",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06535698"
    },
    {
      "nct_id": "NCT01536821",
      "title": "PROGENI (Parkinson's Research: The Organized Genetics Initiative) Family Study of LRRK2 (Leucine-rich Repeat Kinase 2)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Parkinson Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 81,
      "start_date": "2011-05",
      "completion_date": "2013-12",
      "has_results": false,
      "last_update_posted_date": "2013-12-16",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 9,
      "location_summary": "Weston, Florida • Indianapolis, Indiana • Iowa City, Iowa + 6 more",
      "locations": [
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Kansas City",
          "state": "Kansas"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01536821"
    },
    {
      "nct_id": "NCT07115563",
      "title": "Daily Amino Acid Supplementation for People With Parkinson's Disease",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parkinson Disease (PD)"
      ],
      "interventions": [
        {
          "name": "Targeted Amino Acid Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Control (placebo)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Cristina Colon-Semenza",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "50 Years to 90 Years"
      },
      "enrollment_count": 30,
      "start_date": "2025-10-31",
      "completion_date": "2027-11",
      "has_results": false,
      "last_update_posted_date": "2026-08-13",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 2,
      "location_summary": "Farmington, Connecticut • Storrs, Connecticut",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        },
        {
          "city": "Storrs",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07115563"
    },
    {
      "nct_id": "NCT01366924",
      "title": "Essential Amino Acids Supplementation and Muscle Protein Synthesis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Muscle Loss",
        "Muscle Anabolism"
      ],
      "interventions": [
        {
          "name": "Essential Amino Acids",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Endurance exercise",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "United States Army Research Institute of Environmental Medicine",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 23,
      "start_date": "2007-05",
      "completion_date": "2010-07",
      "has_results": false,
      "last_update_posted_date": "2017-07-21",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • Natick, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Natick",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01366924"
    },
    {
      "nct_id": "NCT02918981",
      "title": "Nutritional Strategies to Augment the Postprandial Muscle Protein Synthetic Response to the Ingestion of a Low Dose of Protein in Middle-aged Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Aging"
      ],
      "interventions": [
        {
          "name": "Resistance Exercise",
          "type": "BEHAVIORAL"
        },
        {
          "name": "14 g Whey protein",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "6.6 g Whey protein + 1.25 g leucine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "4 g Whey protein + 1.25 g leucine + 2.6 g Whey peptides",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "6.6 g Whey protein + 1.25 g leucine + 0.8 g Citrulline",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Water control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University of Illinois at Urbana-Champaign",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "79 Years",
        "sex": "FEMALE",
        "summary": "20 Years to 79 Years · Female only"
      },
      "enrollment_count": 50,
      "start_date": "2016-10",
      "completion_date": "2019-03-06",
      "has_results": false,
      "last_update_posted_date": "2020-11-03",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 1,
      "location_summary": "Urbana, Illinois",
      "locations": [
        {
          "city": "Urbana",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02918981"
    },
    {
      "nct_id": "NCT03759665",
      "title": "N-Acetyl-L-Leucine for GM2 Gangliosidosis (Tay-Sachs and Sandhoff Disease)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "GM2 Gangliosidosis",
        "Tay-Sachs Disease",
        "Sandhoff Disease"
      ],
      "interventions": [
        {
          "name": "IB1001",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "IntraBio Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2019-06-07",
      "completion_date": "2023-01-09",
      "has_results": true,
      "last_update_posted_date": "2024-03-12",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 3,
      "location_summary": "Los Angeles, California • Rochester, Minnesota • New York, New York",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03759665"
    },
    {
      "nct_id": "NCT02733120",
      "title": "Metabolic Processes in Adults and Adolescents With Autism Spectrum Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Autism Spectrum Disorder"
      ],
      "interventions": [
        {
          "name": "stable isotope infusion",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2015-12-03",
      "completion_date": "2017-10-30",
      "has_results": false,
      "last_update_posted_date": "2025-09-30",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02733120"
    },
    {
      "nct_id": "NCT03339232",
      "title": "BCAA Supplemental Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cirrhosis"
      ],
      "interventions": [
        {
          "name": "BCAA Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Physical Activity",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Loyola University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 26,
      "start_date": "2017-10-02",
      "completion_date": "2019-06-17",
      "has_results": false,
      "last_update_posted_date": "2020-06-24",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 1,
      "location_summary": "Maywood, Illinois",
      "locations": [
        {
          "city": "Maywood",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03339232"
    },
    {
      "nct_id": "NCT05235464",
      "title": "High Protein Diet and Atherosclerosis",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atherosclerosis"
      ],
      "interventions": [
        {
          "name": "Standard meal",
          "type": "OTHER"
        },
        {
          "name": "High animal protein meal",
          "type": "OTHER"
        },
        {
          "name": "High plant protein meal",
          "type": "OTHER"
        },
        {
          "name": "High plant protein meal with additional leucine",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Missouri-Columbia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "45 Years to 75 Years"
      },
      "enrollment_count": 24,
      "start_date": "2023-03-13",
      "completion_date": "2028-03-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-11",
      "last_synced_at": "2026-09-02T17:42:11.576Z",
      "location_count": 1,
      "location_summary": "Columbia, Missouri",
      "locations": [
        {
          "city": "Columbia",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05235464"
    }
  ]
}