{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Macular+Pigment+Optical+Density",
    "query": {
      "condition": "Macular Pigment Optical Density"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 6,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T21:58:03.830Z",
  "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": "NCT03983525",
      "title": "The Effect of Gojiberry Intake (Lycium Barbarium) on Macular Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Macular Pigment Optical Density"
      ],
      "interventions": [
        {
          "name": "Goji berry",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Lutein + zeaxanthin supplementation",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "45 Years to 65 Years"
      },
      "enrollment_count": 31,
      "start_date": "2019-06-10",
      "completion_date": "2020-06-15",
      "has_results": false,
      "last_update_posted_date": "2020-07-23",
      "last_synced_at": "2026-07-22T21:58:03.830Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03983525"
    },
    {
      "nct_id": "NCT00564902",
      "title": "The Zeaxanthin and Visual Function Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Age Related Macular Degeneration",
        "Cognition Disorders"
      ],
      "interventions": [
        {
          "name": "3R 3'R Zeaxanthin",
          "type": "DRUG"
        },
        {
          "name": "Lutein",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Lutein and Zeaxanthin",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Chrysantis, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "45 Years to 90 Years"
      },
      "enrollment_count": 60,
      "start_date": "2007-11",
      "completion_date": "2009-06",
      "has_results": true,
      "last_update_posted_date": "2012-03-29",
      "last_synced_at": "2026-07-22T21:58:03.830Z",
      "location_count": 1,
      "location_summary": "North Chicago, Illinois",
      "locations": [
        {
          "city": "North Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00564902"
    },
    {
      "nct_id": "NCT06489873",
      "title": "Lutein, Zeaxathin, and Fish Oil Supplementation",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cognitive Performance",
        "Age-Related Macular Degeneration",
        "Bone Loss"
      ],
      "interventions": [
        {
          "name": "Active Comparator (Lutein, zeaxanthin, and fish oil supplement (LZF)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo Comparator",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 80,
      "start_date": "2024-02-07",
      "completion_date": "2026-05-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-30",
      "last_synced_at": "2026-07-22T21:58:03.830Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06489873"
    },
    {
      "nct_id": "NCT04676126",
      "title": "Augmented Macular Pigment-containing Nutraceutical and Central Visual Function",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Glaucoma",
        "Glaucoma Eye",
        "Glaucoma, Open-Angle"
      ],
      "interventions": [
        {
          "name": "Lumega-Z",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Dorzolamide Hcl 2% Oph Soln",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of the Incarnate Word",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2021-05",
      "completion_date": "2022-05",
      "has_results": false,
      "last_update_posted_date": "2022-10-04",
      "last_synced_at": "2026-07-22T21:58:03.830Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04676126"
    },
    {
      "nct_id": "NCT06465888",
      "title": "Influence of Eggs on Cognitive Performance",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cognitive Function"
      ],
      "interventions": [
        {
          "name": "egg whites",
          "type": "OTHER"
        },
        {
          "name": "whole eggs",
          "type": "OTHER"
        },
        {
          "name": "Omega-3 eggs",
          "type": "OTHER"
        },
        {
          "name": "egg yolk",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "50 Years to 75 Years"
      },
      "enrollment_count": 106,
      "start_date": "2017-08-22",
      "completion_date": "2020-03-19",
      "has_results": false,
      "last_update_posted_date": "2025-09-29",
      "last_synced_at": "2026-07-22T21:58:03.830Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06465888"
    },
    {
      "nct_id": "NCT01682382",
      "title": "Association of Macular Pigment Optical Density (MPOD) and Genetic Variants in Complement Factor H in Subjects With Choroidal Neovascular (CNV)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Age-related Macular Degeneration",
        "Choroidal Neovascular Age-related Macular Degeneration"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Sequenom, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 45,
      "start_date": "2012-08",
      "completion_date": "2013-10",
      "has_results": false,
      "last_update_posted_date": "2014-01-20",
      "last_synced_at": "2026-07-22T21:58:03.830Z",
      "location_count": 1,
      "location_summary": "Encinitas, California",
      "locations": [
        {
          "city": "Encinitas",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01682382"
    }
  ]
}