{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+B12&page=4",
    "query": {
      "intervention": "vitamin B12",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 167,
    "total_pages": 17,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+B12&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+B12&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T04:44:03.020Z",
  "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": "NCT02876315",
      "title": "The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Redoxon VI",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Oregon State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "55 Years to 75 Years"
      },
      "enrollment_count": 42,
      "start_date": "2016-12",
      "completion_date": "2019-12",
      "has_results": false,
      "last_update_posted_date": "2022-12-01",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "Corvallis, Oregon",
      "locations": [
        {
          "city": "Corvallis",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02876315"
    },
    {
      "nct_id": "NCT07385144",
      "title": "A Study of a Dietary Supplement on Serum Biomarkers in Children",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Nutritional Status",
        "Serum Biomarkers"
      ],
      "interventions": [
        {
          "name": "Dietary Supplement (Kids Multi & Omegas)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "SF Research Institute, Inc.",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "15 Years",
        "sex": "ALL",
        "summary": "4 Years to 15 Years"
      },
      "enrollment_count": 30,
      "start_date": "2026-01-30",
      "completion_date": "2026-03-05",
      "has_results": false,
      "last_update_posted_date": "2026-02-04",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07385144"
    },
    {
      "nct_id": "NCT00197704",
      "title": "Nutrition, Immunology and Epidemiology of Tuberculosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Tuberculosis"
      ],
      "interventions": [
        {
          "name": "Multivitamins",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Harvard School of Public Health (HSPH)",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 876,
      "start_date": "2000-03",
      "completion_date": "2004-05",
      "has_results": false,
      "last_update_posted_date": "2010-11-11",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00197704"
    },
    {
      "nct_id": "NCT02076347",
      "title": "Comparison of Two Pharmacist-led Population Management Approaches to Increase Monitoring of Vitamin B12 and Serum Creatinine Levels for Patients on Metformin",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 2 Diabetes",
        "Vitamin B12 Deficiency",
        "Neuropathy",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "Office visit intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Electronic Message Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Ohio State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 489,
      "start_date": "2014-02",
      "completion_date": "2015-10",
      "has_results": false,
      "last_update_posted_date": "2015-10-19",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02076347"
    },
    {
      "nct_id": "NCT01369030",
      "title": "Deplin® P.L.U.S. Program (Progress Through Learning Understanding & Support)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Deplin®",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Pamlab, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 554,
      "start_date": "2010-11",
      "completion_date": "2012-04",
      "has_results": true,
      "last_update_posted_date": "2014-06-03",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 2,
      "location_summary": "Greensboro, North Carolina • Nashville, Tennessee",
      "locations": [
        {
          "city": "Greensboro",
          "state": "North Carolina"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01369030"
    },
    {
      "nct_id": "NCT01381354",
      "title": "Nutrition, Neuromuscular Electrical Stimulation (NMES) and Secondary Progressive Multiple Sclerosis (SPMS)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Progressive exercise",
          "type": "OTHER"
        },
        {
          "name": "Neuromuscular electrical stimulation delivered using the electrical therapy device EMPI 300 PV",
          "type": "DEVICE"
        },
        {
          "name": "Modified paleolithic diet",
          "type": "OTHER"
        },
        {
          "name": "Omega 3 fatty acids",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Full Spectrum vitamin",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Essential - hydroxytyrosol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Maltodextrin fiber supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Mineral boost (magnesium)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Niacinamide",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Methyl B12",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Taurine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "creatine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "thiamine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "riboflavin",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "N acetylcysteine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "alpha lipoic acid",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "L acetyl carnitine",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "methyl folate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "coenzyme Q",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "meditation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "self massage",
          "type": "BEHAVIORAL"
        },
        {
          "name": "learning",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Coconut oil",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DEVICE",
        "DIETARY_SUPPLEMENT",
        "BEHAVIORAL"
      ],
      "sponsor": "University of Iowa",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 38,
      "start_date": "2010-10",
      "completion_date": "2016-05",
      "has_results": false,
      "last_update_posted_date": "2018-06-26",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "Iowa City, Iowa",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01381354"
    },
    {
      "nct_id": "NCT00589667",
      "title": "A Phase II Study of Pemetrexed Plus Gemcitabine for Metastatic/Recurrent Head and Neck Cancer (HNSCC)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Head and Neck Cancer"
      ],
      "interventions": [
        {
          "name": "Pemetrexed plus Gemcitabine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "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": "2006-09",
      "completion_date": "2010-07",
      "has_results": true,
      "last_update_posted_date": "2014-04-02",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00589667"
    },
    {
      "nct_id": "NCT05175248",
      "title": "Nutritional Intervention for Endometriosis",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Endometriosis"
      ],
      "interventions": [
        {
          "name": "Plant-based Intervention Group",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Physicians Committee for Responsible Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 120,
      "start_date": "2022-03-02",
      "completion_date": "2029-12",
      "has_results": false,
      "last_update_posted_date": "2026-07-23",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05175248"
    },
    {
      "nct_id": "NCT00998946",
      "title": "Study of Pralatrexate to Treat Participants With Relapsed or Refractory B-cell Non-Hodgkin's Lymphoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lymphoma, B-Cell"
      ],
      "interventions": [
        {
          "name": "Pralatrexate",
          "type": "DRUG"
        },
        {
          "name": "Vitamin B12",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Folic Acid",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Spectrum Pharmaceuticals, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 29,
      "start_date": "2009-09",
      "completion_date": "2012-08",
      "has_results": true,
      "last_update_posted_date": "2021-11-05",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 11,
      "location_summary": "Beverly Hills, California • Post Falls, Idaho • Chicago, Illinois + 8 more",
      "locations": [
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Post Falls",
          "state": "Idaho"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Shreveport",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00998946"
    },
    {
      "nct_id": "NCT01420679",
      "title": "Pralatrexate vs Observation Following CHOP-based Chemotherapy in Undiagnosed Peripheral T-cell Lymphoma Patients",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Peripheral T-cell Lymphoma"
      ],
      "interventions": [
        {
          "name": "Pralatrexate Injection",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Spectrum Pharmaceuticals, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 21,
      "start_date": "2011-08",
      "completion_date": "2017-12",
      "has_results": true,
      "last_update_posted_date": "2021-11-19",
      "last_synced_at": "2026-10-07T04:44:03.020Z",
      "location_count": 3,
      "location_summary": "Novi, Michigan • New York, New York",
      "locations": [
        {
          "city": "Novi",
          "state": "Michigan"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01420679"
    }
  ]
}