{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Medifast+5+%26+1+Plan",
    "query": {
      "intervention": "Medifast 5 & 1 Plan"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T04:32:06.480Z",
  "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": "NCT01211301",
      "title": "Medifast 5 & 1 Plan",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Body Weight",
        "Weight Loss",
        "Overweight",
        "Nutrition Disorders"
      ],
      "interventions": [
        {
          "name": "Food-based, Reduced Energy Diet Plan",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Medifast 5 & 1 Plan",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "19 Years to 65 Years"
      },
      "enrollment_count": 120,
      "start_date": "2010-10",
      "completion_date": "2013-04",
      "has_results": false,
      "last_update_posted_date": "2013-06-19",
      "last_synced_at": "2026-09-29T04:32:06.480Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01211301"
    },
    {
      "nct_id": "NCT02150837",
      "title": "Retrospective Chart Review of the 5 & 2 & 2 and 4 & 2 & 1 Plans",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "5 & 2 & 2 Plan",
          "type": "OTHER"
        },
        {
          "name": "4 & 2 & 1 Plan",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Medifast, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 372,
      "start_date": "2014-01",
      "completion_date": "2014-05",
      "has_results": true,
      "last_update_posted_date": "2019-09-13",
      "last_synced_at": "2026-09-29T04:32:06.480Z",
      "location_count": 1,
      "location_summary": "Owings Mills, Maryland",
      "locations": [
        {
          "city": "Owings Mills",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02150837"
    },
    {
      "nct_id": "NCT02835092",
      "title": "Weight Loss Using the Take Shape For Life Program or the Medifast Direct Program Versus a Self-Directed Diet",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Take Shape For Life Program",
          "type": "OTHER"
        },
        {
          "name": "Medifast Direct Program",
          "type": "OTHER"
        },
        {
          "name": "Self-directed Control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Medifast, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 198,
      "start_date": "2016-07",
      "completion_date": "2017-02",
      "has_results": true,
      "last_update_posted_date": "2019-01-22",
      "last_synced_at": "2026-09-29T04:32:06.480Z",
      "location_count": 1,
      "location_summary": "Addison, Illinois",
      "locations": [
        {
          "city": "Addison",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02835092"
    },
    {
      "nct_id": "NCT01011491",
      "title": "Comparison of Medifast's 5 & 1 Plan to a Food-based Plan of Equal Calories",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Medifast 5 & 1 Plan for weight loss and weight maintenance",
          "type": "OTHER"
        },
        {
          "name": "Food-based diet plan for weight loss and weight maintenance",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Medifast, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 90,
      "start_date": "2008-03",
      "completion_date": "2009-09",
      "has_results": false,
      "last_update_posted_date": "2009-11-11",
      "last_synced_at": "2026-09-29T04:32:06.480Z",
      "location_count": 1,
      "location_summary": "Owings Mills, Maryland",
      "locations": [
        {
          "city": "Owings Mills",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01011491"
    },
    {
      "nct_id": "NCT02730988",
      "title": "Effect of High Protein Weight Loss for Seniors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Weight Loss"
      ],
      "interventions": [
        {
          "name": "Weight Stable Group",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Wake Forest University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "65 Years to 79 Years"
      },
      "enrollment_count": 96,
      "start_date": "2015-07-01",
      "completion_date": "2017-04-17",
      "has_results": true,
      "last_update_posted_date": "2019-01-23",
      "last_synced_at": "2026-09-29T04:32:06.480Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02730988"
    }
  ]
}