{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Substrate+Utilization",
    "query": {
      "condition": "Substrate Utilization"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 12,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Substrate+Utilization&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-04T13:07:27.368Z",
  "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": "NCT01976455",
      "title": "The Breathe Light Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Over-eating",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "20% fewer calories",
          "type": "OTHER"
        },
        {
          "name": "40% fewer calories",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "USDA Grand Forks Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 22,
      "start_date": "2013-10",
      "completion_date": "2016-11",
      "has_results": false,
      "last_update_posted_date": "2022-02-02",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Grand Forks, North Dakota",
      "locations": [
        {
          "city": "Grand Forks",
          "state": "North Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01976455"
    },
    {
      "nct_id": "NCT04862208",
      "title": "Breakfast Consumption and Energy Balance in Active Adult Males",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Energy Intake",
        "Substrate Utilization",
        "Hormones",
        "Satiety"
      ],
      "interventions": [
        {
          "name": "Maltodextrin supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Whey supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Water",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Ohio University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "MALE",
        "summary": "18 Years to 45 Years · Male only"
      },
      "enrollment_count": 10,
      "start_date": "2021-05-06",
      "completion_date": "2023-05-01",
      "has_results": false,
      "last_update_posted_date": "2023-09-07",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Athens, Ohio",
      "locations": [
        {
          "city": "Athens",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04862208"
    },
    {
      "nct_id": "NCT06242015",
      "title": "Ordered Eating and Acute Exercise",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Glucose Metabolism Disorders",
        "Hunger"
      ],
      "interventions": [
        {
          "name": "Carbohydrate-first meal",
          "type": "OTHER"
        },
        {
          "name": "Carbohydrate-last meal",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Old Dominion University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 23,
      "start_date": "2024-02-06",
      "completion_date": "2024-07-30",
      "has_results": false,
      "last_update_posted_date": "2025-08-01",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Norfolk, Virginia",
      "locations": [
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06242015"
    },
    {
      "nct_id": "NCT04539054",
      "title": "Pre-workout Supplement Versus Caffeine on Energy Expenditure.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "ENGN Shred",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Nutricost caffeine powder",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Crystal Light",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Northern Illinois University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "29 Years",
        "sex": "MALE",
        "summary": "19 Years to 29 Years · Male only"
      },
      "enrollment_count": 12,
      "start_date": "2019-09-01",
      "completion_date": "2019-12-31",
      "has_results": false,
      "last_update_posted_date": "2020-09-04",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "DeKalb, Illinois",
      "locations": [
        {
          "city": "DeKalb",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04539054"
    },
    {
      "nct_id": "NCT00714220",
      "title": "Quantitative Measurement of Nutritional Substrate Utilization in Patients With Amyotrophic Lateral Sclerosis (ALS)",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Amyotrophic Lateral Sclerosis",
        "Neurodegenerative Diseases"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Drexel University College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "20 Years to 85 Years"
      },
      "enrollment_count": 107,
      "start_date": "2006-11",
      "completion_date": "2014-09",
      "has_results": false,
      "last_update_posted_date": "2015-10-29",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00714220"
    },
    {
      "nct_id": "NCT01729143",
      "title": "Impact of Black Pepper on Energy Expenditure and Substrate Utilization",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "24-hour energy expenditure and substrate utilization",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "50 Years to 65 Years · Female only"
      },
      "enrollment_count": 18,
      "start_date": "2011-04",
      "completion_date": "2011-07",
      "has_results": false,
      "last_update_posted_date": "2016-04-06",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Kannapolis, North Carolina",
      "locations": [
        {
          "city": "Kannapolis",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01729143"
    },
    {
      "nct_id": "NCT04061369",
      "title": "Energy Expenditure and Substrate Oxidation in a Whole Room Calorimeter",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Overweight",
        "Obesity",
        "Body Weight"
      ],
      "interventions": [
        {
          "name": "Low fat meal",
          "type": "OTHER"
        },
        {
          "name": "Moderate fat meal",
          "type": "OTHER"
        },
        {
          "name": "High fat meal",
          "type": "OTHER"
        },
        {
          "name": "High fat liquid meal",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "USDA, Western Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 7,
      "start_date": "2019-04-18",
      "completion_date": "2019-08-31",
      "has_results": false,
      "last_update_posted_date": "2023-05-15",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04061369"
    },
    {
      "nct_id": "NCT02731066",
      "title": "Substrate Utilization, Exercise Performance, and Skeletal Muscle Response to Energy Deficit and Altitude Acclimatization",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight Loss",
        "Other Effects of High Altitude"
      ],
      "interventions": [
        {
          "name": "Standard pro",
          "type": "OTHER"
        },
        {
          "name": "High pro",
          "type": "OTHER"
        },
        {
          "name": "carbo bev",
          "type": "OTHER"
        },
        {
          "name": "placebo bev",
          "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": 21,
      "start_date": "2016-03",
      "completion_date": "2016-09",
      "has_results": false,
      "last_update_posted_date": "2017-11-06",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Natick, Massachusetts",
      "locations": [
        {
          "city": "Natick",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02731066"
    },
    {
      "nct_id": "NCT04819308",
      "title": "Differences in Nutrient Use During Exercise Between Children of Varying Body Mass Indices and Fitness Levels",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Obesity"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Arkansas Children's Hospital Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "8 Years to 11 Years"
      },
      "enrollment_count": 95,
      "start_date": "2021-03-18",
      "completion_date": "2025-12",
      "has_results": false,
      "last_update_posted_date": "2025-02-25",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Little Rock, Arkansas",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04819308"
    },
    {
      "nct_id": "NCT02211599",
      "title": "Fat Burning After a Meal",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postprandial Effect of Carbohydrate Beverage Consumption"
      ],
      "interventions": [
        {
          "name": "15% protein",
          "type": "OTHER"
        },
        {
          "name": "30% protein",
          "type": "OTHER"
        },
        {
          "name": "Sweetened beverage",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "USDA Grand Forks Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 29,
      "start_date": "2014-11",
      "completion_date": "2016-06",
      "has_results": false,
      "last_update_posted_date": "2022-02-02",
      "last_synced_at": "2026-09-04T13:07:27.368Z",
      "location_count": 1,
      "location_summary": "Grand Forks, North Dakota",
      "locations": [
        {
          "city": "Grand Forks",
          "state": "North Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02211599"
    }
  ]
}