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    "story_id": "mp-2026-07-26-012",
    "source_story_id": "tmp-story-photo-calorie-apps",
    "edition_id": "mp-2026-07-26-morning-0017",
    "edition_url": "https://themachinepress.com/edition/2026-07-26",
    "position": 12,
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    "section": "consumer-products",
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    "headline": "The Meal Photo Missed Hundreds of Calories",
    "slug": "the-meal-photo-missed-hundreds-of-calories",
    "dek": "Four image-based food-logging apps systematically underestimated the energy and fat in standardized meals during a preliminary comparison.",
    "summary": "Four image-based food-logging apps systematically underestimated the energy and fat in standardized meals during a preliminary comparison.",
    "body_text": "Researchers photographed 102 precisely measured meals and submitted the images to four consumer calorie-tracking apps. The apps underestimated energy by roughly 250 to 345 calories per meal on average and missed about 30 grams of fat; a larger follow-up set exceeded 200 meals. The findings are preliminary conference results and do not establish how every app performs in ordinary use. The generic code image is illustrative and does not show an evaluated application.",
    "why_it_matters": "Four image-based food-logging apps systematically underestimated the energy and fat in standardized meals during a preliminary comparison.",
    "limitations": [
      "The findings are preliminary conference results and do not establish how every app performs in ordinary use.",
      "The generic code image is illustrative and does not show an evaluated application."
    ],
    "importance": 8,
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    "first_published_at": "2026-07-26T09:00:00.000-04:00",
    "modified_at": "2026-07-26T09:00:00.000-04:00",
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        "text": "Four image-based food-logging apps systematically underestimated the energy and fat in standardized meals during a preliminary comparison.",
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        "qualification": "The findings are preliminary conference results and do not establish how every app performs in ordinary use."
      }
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    "source_ids": [
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    "tags": [
      "calorie tracking",
      "computer vision",
      "nutrition",
      "mobile apps"
    ],
    "image_url": "https://themachinepress.com/issues/2026-07-26/calorie-apps-file-image.webp",
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-07-26-012",
      "title": "Medical Xpress: Photo-based calorie tracking app comparison",
      "publisher": "Medical Xpress",
      "url": "https://medicalxpress.com/news/2026-07-photo-based-calorie-tracking-apps.html",
      "canonical_url": "https://medicalxpress.com/news/2026-07-photo-based-calorie-tracking-apps.html",
      "source_type": "secondary_reporting",
      "is_primary_source": false,
      "published_at": null,
      "accessed_at": "2026-07-26T08:35:02.238-04:00",
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  "corrections": [],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "The Meal Photo Missed Hundreds of Calories",
    "publisher": "The Machine Press",
    "published_at": "2026-07-26T09:00:00.000-04:00",
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