{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Weight+Watchers&page=2",
    "query": {
      "intervention": "Weight Watchers",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Weight+Watchers&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T18:30:21.993Z",
  "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": "NCT00249340",
      "title": "Brief Behavioral Weight Loss Treatment vs. Weight Watchers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Overweight"
      ],
      "interventions": [
        {
          "name": "Weight Watchers",
          "type": "BEHAVIORAL"
        },
        {
          "name": "brief behavioral weight loss treatment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "brief behavioral + Weight Watchers combined treatment",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "The Miriam Hospital",
      "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": 60,
      "start_date": "2005-11",
      "completion_date": "2006-07",
      "has_results": false,
      "last_update_posted_date": "2007-04-11",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Providence, Rhode Island",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00249340"
    },
    {
      "nct_id": "NCT03014414",
      "title": "Stanford Healthy Heart Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Fun First",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Weight Watchers",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 321,
      "start_date": "2017-03-04",
      "completion_date": "2022-01-27",
      "has_results": false,
      "last_update_posted_date": "2026-04-03",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Palo Alto, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03014414"
    },
    {
      "nct_id": "NCT03571893",
      "title": "Study of an International Commercial Program on Weight Loss and Health Outcomes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight Loss",
        "Weight Change, Body",
        "Obesity",
        "Diet Modification"
      ],
      "interventions": [
        {
          "name": "Weight Watchers Freestyle (Flex)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "DIY Personal Plan",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 373,
      "start_date": "2018-06-19",
      "completion_date": "2019-11-04",
      "has_results": false,
      "last_update_posted_date": "2020-03-13",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03571893"
    },
    {
      "nct_id": "NCT01900392",
      "title": "Financial Incentives for Maintenance of Weight Loss",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Financial incentive",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "30 Years to 80 Years"
      },
      "enrollment_count": 191,
      "start_date": "2013-09",
      "completion_date": "2016-02",
      "has_results": true,
      "last_update_posted_date": "2018-09-27",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01900392"
    },
    {
      "nct_id": "NCT02417220",
      "title": "Weight Watchers Online 2015",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Overweight",
        "Body Weight"
      ],
      "interventions": [
        {
          "name": "Weight Watchers Online 2015 Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Electronic Scale with Feedback",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "The Miriam Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 92,
      "start_date": "2015-04",
      "completion_date": "2016-01",
      "has_results": false,
      "last_update_posted_date": "2016-03-29",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 2,
      "location_summary": "Providence, Rhode Island • Knoxville, Tennessee",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        },
        {
          "city": "Knoxville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02417220"
    },
    {
      "nct_id": "NCT04302727",
      "title": "Delicious Eating for Life in Southern Homes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight Loss",
        "Diet, Healthy",
        "Cardiovascular Risk Factor"
      ],
      "interventions": [
        {
          "name": "Med-South Weight Loss Intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "WW",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 360,
      "start_date": "2020-07-06",
      "completion_date": "2024-06-16",
      "has_results": true,
      "last_update_posted_date": "2025-11-03",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04302727"
    },
    {
      "nct_id": "NCT04202133",
      "title": "Neurocognitive Benefits of a Weight Management Program",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Overweight and Obesity"
      ],
      "interventions": [
        {
          "name": "WW (formerly Weight Watchers)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Waitlist",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 60 Years · Female only"
      },
      "enrollment_count": 61,
      "start_date": "2019-11-20",
      "completion_date": "2021-07-20",
      "has_results": true,
      "last_update_posted_date": "2025-02-10",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04202133"
    },
    {
      "nct_id": "NCT01888172",
      "title": "Weight Watchers Online",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Weight Watchers Online Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Philips ActiveLink",
          "type": "DEVICE"
        },
        {
          "name": "Eating and Activity Newsletter",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DEVICE"
      ],
      "sponsor": "The Miriam Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 270,
      "start_date": "2013-05",
      "completion_date": "2015-06",
      "has_results": false,
      "last_update_posted_date": "2015-09-23",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 2,
      "location_summary": "Providence, Rhode Island • Knoxville, Tennessee",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        },
        {
          "city": "Knoxville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01888172"
    },
    {
      "nct_id": "NCT01601574",
      "title": "Weight Loss Study for People With Type 2 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Type 2 Diabetes",
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Weight Watchers modified program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Standard Care group",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 563,
      "start_date": "2012-05",
      "completion_date": "2014-09",
      "has_results": false,
      "last_update_posted_date": "2014-10-15",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 15,
      "location_summary": "Birmingham, Alabama • La Jolla, California • Augusta, Georgia + 11 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01601574"
    },
    {
      "nct_id": "NCT02501239",
      "title": "Health At Every Size and Acceptance and Commitment Therapy vs. Behavioral Weight Loss for Obesity and Depression in Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depression",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Accept Yourself!",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Weight Watchers",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Dartmouth-Hitchcock Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 19,
      "start_date": "2015-08-12",
      "completion_date": "2017-05-07",
      "has_results": false,
      "last_update_posted_date": "2018-04-26",
      "last_synced_at": "2026-09-29T18:30:21.993Z",
      "location_count": 1,
      "location_summary": "Lebanon, New Hampshire",
      "locations": [
        {
          "city": "Lebanon",
          "state": "New Hampshire"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02501239"
    }
  ]
}