{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Ascorbic+acid+%28vitamin+C%29",
    "query": {
      "intervention": "Ascorbic acid (vitamin C)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 367,
    "total_pages": 37,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Ascorbic+acid+%28vitamin+C%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-02T07:44:35.770Z",
  "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": "NCT05926245",
      "title": "Topical Absorption of Glutathione-cyclodextrin Complex in Healthy Human Subjects Improves Immune Response Against Mycobacterium Infection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Glutathione-cyclodextrin Complex Absorption"
      ],
      "interventions": [
        {
          "name": "Glutaryl Solution",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo Solution",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Western University of Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "21 Years to 65 Years"
      },
      "enrollment_count": 30,
      "start_date": "2022-07-11",
      "completion_date": "2022-12-14",
      "has_results": false,
      "last_update_posted_date": "2023-07-03",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "Pomona, California",
      "locations": [
        {
          "city": "Pomona",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05926245"
    },
    {
      "nct_id": "NCT03293004",
      "title": "Collagen Vitamin C Dose Response Performance",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy Volunteers"
      ],
      "interventions": [
        {
          "name": "Hydrolyzed collagen",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Vitamin C",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Optimized Hydrolyzed Collagen and Vitamin C",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Gummy Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "25 Years",
        "sex": "MALE",
        "summary": "18 Years to 25 Years · Male only"
      },
      "enrollment_count": 23,
      "start_date": "2017-09-13",
      "completion_date": "2018-05-24",
      "has_results": false,
      "last_update_posted_date": "2018-08-21",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03293004"
    },
    {
      "nct_id": "NCT05932511",
      "title": "Topical Ascorbic Acid for Treatment of Squamous Cell Skin Cancer",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Squamous Cell Cancer",
        "Squamous Cell Carcinoma",
        "Skin Cancer",
        "Non-melanoma Skin Cancer"
      ],
      "interventions": [
        {
          "name": "30% ascorbic acid in DMSO",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Center for Biomedical Research, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 15,
      "start_date": "2023-06-12",
      "completion_date": "2024-12-31",
      "has_results": false,
      "last_update_posted_date": "2023-08-30",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "Boise, Idaho",
      "locations": [
        {
          "city": "Boise",
          "state": "Idaho"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05932511"
    },
    {
      "nct_id": "NCT00565214",
      "title": "Effect of Supplementary Vitamins on Oxidant Gene Expression in the Lungs of Healthy Smokers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Obstructive Pulmonary Disease (COPD)"
      ],
      "interventions": [
        {
          "name": "Group 1",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Group 2",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 46,
      "start_date": "2007-09",
      "completion_date": "2010-10",
      "has_results": false,
      "last_update_posted_date": "2017-05-25",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00565214"
    },
    {
      "nct_id": "NCT04344184",
      "title": "SAFEty Study of Early Infusion of Vitamin C for Treatment of Novel Coronavirus Acute Lung Injury (SAFE EVICT CORONA-ALI)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "COVID-19",
        "Lung Injury, Acute",
        "Kidney Injury"
      ],
      "interventions": [
        {
          "name": "L-ascorbic acid",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 47,
      "start_date": "2020-12-18",
      "completion_date": "2022-06-10",
      "has_results": true,
      "last_update_posted_date": "2024-04-04",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04344184"
    },
    {
      "nct_id": "NCT04342728",
      "title": "Coronavirus 2019 (COVID-19)- Using Ascorbic Acid and Zinc Supplementation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "COVID",
        "Corona Virus Infection"
      ],
      "interventions": [
        {
          "name": "Ascorbic Acid",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Zinc Gluconate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Ascorbic Acid and Zinc Gluconate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Standard of Care",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 214,
      "start_date": "2020-04-08",
      "completion_date": "2021-02-11",
      "has_results": false,
      "last_update_posted_date": "2021-02-16",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 2,
      "location_summary": "Weston, Florida • Cleveland, Ohio",
      "locations": [
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04342728"
    },
    {
      "nct_id": "NCT00085345",
      "title": "Melphalan, Arsenic Trioxide, and Ascorbic Acid in Treating Patients With Relapsed or Refractory Multiple Myeloma",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Stage II Multiple Myeloma",
        "Stage III Multiple Myeloma",
        "Refractory Plasma Cell Neoplasm"
      ],
      "interventions": [
        {
          "name": "arsenic trioxide",
          "type": "DRUG"
        },
        {
          "name": "ascorbic acid",
          "type": "DRUG"
        },
        {
          "name": "melphalan",
          "type": "DRUG"
        },
        {
          "name": "chemosensitization/potentiation",
          "type": "PROCEDURE"
        },
        {
          "name": "chemotherapy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Oncotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2013-07-10",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 19,
      "location_summary": "Glendale, Arizona • Bakersfield, California • Campbell, California + 16 more",
      "locations": [
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Campbell",
          "state": "California"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Fresno",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00085345"
    },
    {
      "nct_id": "NCT06565312",
      "title": "A Single Group Study to Evaluate the Effects of a Probiotic Vaginal Suppository on Vaginal Health.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vaginal Health",
        "Vaginal pH"
      ],
      "interventions": [
        {
          "name": "Flora Power Probiotic Vaginal Suppository",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Love Wellness",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 40,
      "start_date": "2024-05-10",
      "completion_date": "2024-07-10",
      "has_results": false,
      "last_update_posted_date": "2024-08-21",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "Santa Monica, California",
      "locations": [
        {
          "city": "Santa Monica",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06565312"
    },
    {
      "nct_id": "NCT01515046",
      "title": "Clinical Trial of High-dose Vitamin C for Advanced Pancreatic Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pancreatic Neoplasms",
        "Pancreatic Cancer"
      ],
      "interventions": [
        {
          "name": "Gemcitabine with escalating ascorbic acid",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Joseph J. Cullen",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1,
      "start_date": "2012-09",
      "completion_date": "2016-12",
      "has_results": true,
      "last_update_posted_date": "2017-06-08",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 1,
      "location_summary": "Iowa City, Iowa",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01515046"
    },
    {
      "nct_id": "NCT06861088",
      "title": "The Effect of Kinisoquin™ on Thromboembolic Events in Patients With Metastatic or Locally Advanced Pancreatic Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Venous Thromboembolism",
        "Metastatic Pancreatic Cancer",
        "Locally Advanced Pancreatic Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Kinisoquin™",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Quercis Pharma AG",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 480,
      "start_date": "2025-12-19",
      "completion_date": "2029-10-31",
      "has_results": false,
      "last_update_posted_date": "2026-02-02",
      "last_synced_at": "2026-10-02T07:44:35.770Z",
      "location_count": 3,
      "location_summary": "Ventura, California • Miami Lakes, Florida • Boston, Massachusetts",
      "locations": [
        {
          "city": "Ventura",
          "state": "California"
        },
        {
          "city": "Miami Lakes",
          "state": "Florida"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06861088"
    }
  ]
}