{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Dietary+Supplement+-+Placebo",
    "query": {
      "intervention": "Dietary Supplement - Placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 1154,
    "total_pages": 116,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Dietary+Supplement+-+Placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-24T10:07:36.185Z",
  "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": "NCT03004807",
      "title": "Role of Centrum® Silver® in Improving Micronutrient Status in Older Men",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin Deficiency",
        "Mineral Deficiency",
        "Aging"
      ],
      "interventions": [
        {
          "name": "Centrum Silver Mens' Formula",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Oregon State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "65 Years and older · Male only"
      },
      "enrollment_count": 41,
      "start_date": "2018-07-01",
      "completion_date": "2021-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-06-08",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Corvallis, Oregon",
      "locations": [
        {
          "city": "Corvallis",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03004807"
    },
    {
      "nct_id": "NCT06790771",
      "title": "Effect of Supplement on Appetite and GLP-1",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hunger"
      ],
      "interventions": [
        {
          "name": "High Dose Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Low Dose Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Texas Christian University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 25,
      "start_date": "2025-01-15",
      "completion_date": "2026-03-15",
      "has_results": false,
      "last_update_posted_date": "2026-05-28",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Fort Worth, Texas",
      "locations": [
        {
          "city": "Fort Worth",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06790771"
    },
    {
      "nct_id": "NCT00571285",
      "title": "Clinical Effects of Vitamin D Repletion in Patients With Parkinson's Disease",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin D3 - high dose",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 31,
      "start_date": "2007-06",
      "completion_date": "2015-09",
      "has_results": false,
      "last_update_posted_date": "2017-01-24",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00571285"
    },
    {
      "nct_id": "NCT03557476",
      "title": "Effects of Octacosanol During Taekwondo Training",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Oxidative Stress",
        "Dyslipidemias"
      ],
      "interventions": [
        {
          "name": "Octacosanol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Kosin University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "17 Years",
        "maximum_age": "19 Years",
        "sex": "MALE",
        "summary": "17 Years to 19 Years · Male only"
      },
      "enrollment_count": 26,
      "start_date": "2017-08-01",
      "completion_date": "2018-03-01",
      "has_results": true,
      "last_update_posted_date": "2020-11-10",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03557476"
    },
    {
      "nct_id": "NCT05877417",
      "title": "Blood Flow Restriction and Creatine Supplementation in Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Physical Inactivity"
      ],
      "interventions": [
        {
          "name": "Creatine Monohydrate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Blood Flow Restriction",
          "type": "DEVICE"
        },
        {
          "name": "Exercise",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DEVICE",
        "OTHER"
      ],
      "sponsor": "University of Central Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 68,
      "start_date": "2023-05-17",
      "completion_date": "2024-03-01",
      "has_results": false,
      "last_update_posted_date": "2024-06-12",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Orlando, Florida",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05877417"
    },
    {
      "nct_id": "NCT05194397",
      "title": "Exercise Training and NR Supplementation Trial to Improve Fitness in AYA HCT Survivors",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lymphoblastic Leukemia",
        "Cancer Survivors",
        "Aplastic Anemia",
        "Myelodysplastic Syndromes",
        "Myeloid Leukemia"
      ],
      "interventions": [
        {
          "name": "Nicotinamide Riboside",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Exercise Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Children's Hospital of Philadelphia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "10 Years to 30 Years"
      },
      "enrollment_count": 80,
      "start_date": "2023-02-23",
      "completion_date": "2026-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-12-04",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 3,
      "location_summary": "Duarte, California • Philadelphia, Pennsylvania • Memphis, Tennessee",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05194397"
    },
    {
      "nct_id": "NCT03052413",
      "title": "Study to Evaluate a Nutraceutical Supplement for Treatment of Hair Loss and Thinning in Females",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hair Loss"
      ],
      "interventions": [
        {
          "name": "Nutrafol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Sadick Research Group",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "55 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 55 Years · Female only"
      },
      "enrollment_count": 21,
      "start_date": "2016-12",
      "completion_date": "2017-11-10",
      "has_results": false,
      "last_update_posted_date": "2019-01-02",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 2,
      "location_summary": "Montclair, New Jersey • New York, New York",
      "locations": [
        {
          "city": "Montclair",
          "state": "New Jersey"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03052413"
    },
    {
      "nct_id": "NCT07533045",
      "title": "Effects of Paraxanthine Supplementation on eSport Performancre",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cognitive Function",
        "Gaming Performance"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Paraxanthine",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Lindenwood University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 60,
      "start_date": "2021-06-15",
      "completion_date": "2025-04-14",
      "has_results": false,
      "last_update_posted_date": "2026-04-16",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Saint Charles, Missouri",
      "locations": [
        {
          "city": "Saint Charles",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07533045"
    },
    {
      "nct_id": "NCT00198822",
      "title": "Impact of Maternal Vitamin A or Beta-Carotene Supplementation on Maternal and Infant Mortality in Bangladesh",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Vitamin A Deficiency",
        "Maternal Mortality",
        "Infant Mortality"
      ],
      "interventions": [
        {
          "name": "Vitamin A or Beta-Carotene Supplements",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Johns Hopkins Bloomberg School of Public Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "15 Years to 49 Years · Female only"
      },
      "enrollment_count": 59666,
      "start_date": "2001-08",
      "completion_date": "2008-03",
      "has_results": true,
      "last_update_posted_date": "2012-03-07",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00198822"
    },
    {
      "nct_id": "NCT05793814",
      "title": "Assess the Effects of a Limosilactobacillus Supplement on Recurrence of UTI in Healthy Women During a 6-month Period",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Uncomplicated Symptomatic Urinary Tract Infections"
      ],
      "interventions": [
        {
          "name": "Limosilactobacillus reuteri 3613",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Church & Dwight Company, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 130,
      "start_date": "2021-05-07",
      "completion_date": "2023-06",
      "has_results": false,
      "last_update_posted_date": "2023-03-31",
      "last_synced_at": "2026-09-24T10:07:36.185Z",
      "location_count": 1,
      "location_summary": "Princeton, New Jersey",
      "locations": [
        {
          "city": "Princeton",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05793814"
    }
  ]
}