{
  "slug": "ultra-processed-food",
  "title": "Ultra-processed Food and Excess Energy Intake",
  "claim": "In adults given ad libitum access to a defined diet, assigning foods classified as ultra-processed (NOVA 4) causes greater energy intake and subsequent weight gain (body weight and fat mass) than a minimally processed comparator, and this effect persists when nutrient composition as consumed (macronutrient and micronutrient amounts, their combinations, and the compositional determinants of energy density) is matched, being carried instead by properties that industrial processing confers on foods (such as texture and eating rate, food-matrix disruption, and additives) that are characteristic of the category.",
  "update_date": "2026-10-05",
  "search_cutoff": "2026-10-05",
  "framework_for_addendum": "HSEF v5.3 causal distinctions",
  "historical_scorecard_schema": "5.4",
  "regraded": false,
  "status": "curated_local_addendum",
  "full_academic_review_complete": false,
  "summary": "Controlled diets can change intake and weight, while texture and eating rate produce effects within processing categories. Establishing a category-wide effect independent of the properties consumed requires stronger separation of composition, physical structure and proposed mechanisms.",
  "timeline": [
    {
      "year": "2019",
      "source_id": "P31105044",
      "design": "Inpatient ad libitum randomized crossover",
      "finding": "The ultra-processed diet increased intake and weight relative to its comparator.",
      "limit": "Matched offered nutrients do not guarantee matched consumed composition, nonbeverage density or eating rate; corrections retained.",
      "historical_anchor_only": false
    },
    {
      "year": "2022",
      "source_id": "P35285882",
      "design": "Acute processing-by-texture crossover",
      "finding": "Harder meals slowed intake and reduced energy intake across processing levels.",
      "limit": "Acute lunch and daily intake measures do not demonstrate long-term adiposity mediation.",
      "historical_anchor_only": false
    },
    {
      "year": "2023",
      "source_id": "P37452167",
      "design": "Daily processing-by-texture feeding",
      "finding": "Hard texture reduced daily intake; processing-category contrasts were context-dependent.",
      "limit": "Small preliminary sample and property differences bound an independent category inference.",
      "historical_anchor_only": false
    },
    {
      "year": "2024",
      "source_id": "P39267249",
      "design": "Short open-label randomized crossover",
      "finding": "The tested ultra-processed diet increased intake/weight and reduced chewing per calorie.",
      "limit": "Short exposure and simultaneous food-property changes do not isolate chewing as mediator.",
      "historical_anchor_only": false
    },
    {
      "year": "2025",
      "source_id": "P40043691",
      "design": "Human post-ingestive dopamine PET",
      "finding": "A milkshake produced no significant average striatal dopamine response by the measured method.",
      "limit": "A single food and measurement sensitivity do not exclude every reward mechanism.",
      "historical_anchor_only": false
    },
    {
      "year": "2025",
      "source_id": "P40760353",
      "design": "Healthy-guideline community crossover",
      "finding": "Both diets reduced weight; the minimally processed diet produced greater loss.",
      "limit": "This is a relative difference between defined diets, not a claim that all ultra-processed diets cause weight gain.",
      "historical_anchor_only": false
    },
    {
      "year": "2025",
      "source_id": "P41314613",
      "design": "Two-week slow/fast ultra-processed crossover",
      "finding": "Slower eating reduced intake within ultra-processed diets; body weight did not differ.",
      "limit": "No minimally processed comparator; intake effects and weight outcomes must remain distinct.",
      "historical_anchor_only": false
    },
    {
      "year": "2026",
      "source_id": "P42588167",
      "design": "Processing-by-density hormonal analysis",
      "finding": "Acute insulin differences were reported without a density interaction.",
      "limit": "Secondary exploratory hormonal findings do not establish the appetite/weight mediator.",
      "historical_anchor_only": false
    },
    {
      "year": "2026",
      "source_id": "P42633852",
      "design": "Processing-by-density preload crossover",
      "finding": "Processing did not affect subsequent intake or short-term satiety in the tested design.",
      "limit": "Acute preload results do not refute every longer whole-diet effect; shares a registry with source 10.",
      "historical_anchor_only": false
    }
  ],
  "gaps": [
    {
      "id": "G1",
      "question": "Does category membership predict effects after food properties are controlled?",
      "source_ids": [
        "P31105044",
        "P35285882",
        "P37452167",
        "P40760353"
      ],
      "alternative": "Eating rate, density or nutrient selection may account for a diet contrast.",
      "discriminating_test": "Factorial processing-by-texture designs with measured consumed density/composition, palatability and beverage calories; prespecified category interaction.",
      "gap_type": "bounded_causal_uncertainty",
      "interpretation": "An unresolved inference or scope limit in the checked evidence, not a claim that no relevant study exists anywhere."
    },
    {
      "id": "G2",
      "question": "Does slower eating reduce sustained adiposity?",
      "source_ids": [
        "P37452167",
        "P39267249",
        "P41314613"
      ],
      "alternative": "Intake reduction may be compensated later or be too brief to change weight.",
      "discriminating_test": "Longer randomized texture interventions within and across processing categories, with total intake, fat mass and compensatory snacking measured.",
      "gap_type": "bounded_causal_uncertainty",
      "interpretation": "An unresolved inference or scope limit in the checked evidence, not a claim that no relevant study exists anywhere."
    },
    {
      "id": "G3",
      "question": "Do additives or matrix changes have an independent causal effect?",
      "source_ids": [
        "P35285882",
        "P37452167",
        "P42633852"
      ],
      "alternative": "Additives may mark other properties; acute satiety may differ from chronic metabolic effects.",
      "discriminating_test": "Matched-component/additive and matrix factorial trials with validated exposure, intake and longer outcomes; the current search does not establish absence of all such studies.",
      "gap_type": "bounded_causal_uncertainty",
      "interpretation": "An unresolved inference or scope limit in the checked evidence, not a claim that no relevant study exists anywhere."
    },
    {
      "id": "G4",
      "question": "Which physiological signal actually mediates intake?",
      "source_ids": [
        "P40043691",
        "P42588167",
        "P42633852",
        "P31105044"
      ],
      "alternative": "Measured dopamine or insulin may be weak, downstream or unrelated to the observed diet effect.",
      "discriminating_test": "Repeated appetite/reward measurements within randomized feeding plus selective model perturbation; separate target engagement, correlation and formal mediation.",
      "gap_type": "bounded_causal_uncertainty",
      "interpretation": "An unresolved inference or scope limit in the checked evidence, not a claim that no relevant study exists anywhere."
    }
  ],
  "source_cards": [
    {
      "id": "P31105044",
      "pmid": "31105044",
      "doi": "10.1016/j.cmet.2019.05.008",
      "title": "Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/31105044/",
      "issue_year": "2019",
      "electronic_date": "2019-05-16",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article",
        "Randomized Controlled Trial",
        "Research Support, N.I.H., Intramural"
      ],
      "correction_notices": [
        {
          "type": "ErratumIn",
          "pmid": "31269427",
          "note": ""
        },
        {
          "type": "ErratumIn",
          "pmid": "33027677",
          "note": ""
        }
      ],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "full_text_complete",
      "complete_paper_examined_in_this_update": false,
      "notice_check_scope": "Linked notice presence was checked in the primary record; its scientific impact was not verified in this update."
    },
    {
      "id": "P35285882",
      "pmid": "35285882",
      "doi": "10.1093/ajcn/nqac068",
      "title": "Texture-based differences in eating rate influence energy intake for minimally processed and ultra-processed meals.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/35285882/",
      "issue_year": "2022",
      "electronic_date": "",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Clinical Trial",
        "Journal Article",
        "Research Support, Non-U.S. Gov't"
      ],
      "correction_notices": [],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "full_text_complete",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P37452167",
      "pmid": "37452167",
      "doi": "10.1007/s00394-023-03202-z",
      "title": "Speed limits: the effects of industrial food processing and food texture on daily energy intake and eating behaviour in healthy adults.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/37452167/",
      "issue_year": "2023",
      "electronic_date": "2023-07-14",
      "access_depth": "full_text_partial",
      "checked_details": "Results Par35/38: a daily texture-associated intake effect and meal-specific palatability differences. No consumed-density matching was assumed from as-served menus.",
      "publication_types": [
        "Journal Article"
      ],
      "correction_notices": [],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "full_text_complete",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P39267249",
      "pmid": "39267249",
      "doi": "10.1111/dom.15922",
      "title": "Ultra-processed foods cause weight gain and increased energy intake associated with reduced chewing frequency: A randomized, open-label, crossover study.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/39267249/",
      "issue_year": "2024",
      "electronic_date": "2024-09-12",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article",
        "Randomized Controlled Trial",
        "Research Support, Non-U.S. Gov't"
      ],
      "correction_notices": [],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "abstract_metadata",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P40760353",
      "pmid": "40760353",
      "doi": "10.1038/s41591-025-03842-0",
      "title": "Ultraprocessed or minimally processed diets following healthy dietary guidelines on weight and cardiometabolic health: a randomized, crossover trial.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/40760353/",
      "issue_year": "2025",
      "electronic_date": "2025-08-04",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article",
        "Randomized Controlled Trial"
      ],
      "correction_notices": [],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "full_text_complete",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P40043691",
      "pmid": "40043691",
      "doi": "10.1016/j.cmet.2025.02.002",
      "title": "Brain dopamine responses to ultra-processed milkshakes are highly variable and not significantly related to adiposity in humans.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/40043691/",
      "issue_year": "2025",
      "electronic_date": "",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article"
      ],
      "correction_notices": [],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "abstract_metadata",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P41314613",
      "pmid": "41314613",
      "doi": "10.1016/j.ajcnut.2025.11.012",
      "title": "Eating rate has sustained effects on energy intake from ultraprocessed diets: a 2-week ad libitum dietary randomized controlled crossover trial.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/41314613/",
      "issue_year": "2026",
      "electronic_date": "2025-11-26",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article",
        "Randomized Controlled Trial"
      ],
      "correction_notices": [],
      "cohort_note": "No independence claim made; cohort identity beyond the cited report was not exhaustively audited.",
      "baseline_access_depth": "full_text_complete",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P42588167",
      "pmid": "42588167",
      "doi": "10.3390/nu18152534",
      "title": "Effects of Ultra-Processed Meals with Differing Energy Density on Postprandial Glyco-Insulinemic and Appetite-Related Hormonal Responses: A Randomized Crossover Trial.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/42588167/",
      "issue_year": "2026",
      "electronic_date": "2026-08-04",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article",
        "Randomized Controlled Trial"
      ],
      "correction_notices": [],
      "cohort_note": "RBR-10gfr3fb; secondary hormonal analysis shares registry with preload report 11.",
      "baseline_access_depth": "full_text_complete",
      "complete_paper_examined_in_this_update": false
    },
    {
      "id": "P42633852",
      "pmid": "42633852",
      "doi": "10.1016/j.appet.2026.108761",
      "title": "Effect of ultra-processed-rich versus ultra-processed-free preload meals at high and low energy density on ad libitum energy intake: a randomized crossover trial.",
      "url": "https://pubmed.ncbi.nlm.nih.gov/42633852/",
      "issue_year": "2026",
      "electronic_date": "2026-08-23",
      "access_depth": "abstract_excerpt_checked",
      "checked_details": "Primary record and selected abstract passages checked; no complete-paper appraisal credited.",
      "publication_types": [
        "Journal Article"
      ],
      "correction_notices": [],
      "cohort_note": "RBR-10gfr3fb; not counted as independent of source 10.",
      "baseline_access_depth": "abstract_metadata",
      "complete_paper_examined_in_this_update": false
    }
  ],
  "access_counts": {
    "full_text_partial": 1,
    "abstract_excerpt_checked": 8,
    "metadata_only": 0
  },
  "browser_messages": 2,
  "targeted_check": {
    "pmid": "37452167",
    "provider_access": "selected primary full-text passages reported by Consensus",
    "independent_primary_body_crosscheck": true,
    "verification_scope": "Results Par35/38: a daily texture-associated intake effect and meal-specific palatability differences. No consumed-density matching was assumed from as-served menus."
  },
  "editorial_warning": "A generated Consensus timeline caption incorrectly referred to CRISPR. It was discarded. Forde has a 2026 issue date and 2025 electronic date; hormonal and preload reports sharing a registry are not independent cohorts.",
  "reading_limit": "This focused addendum does not establish 50–70 complete primary Methods/Results examinations per review. Baseline reading receipts and scores retain their original scope.",
  "method": "Case-specific Consensus records assisted gap discovery, chronology and targeted paper questions. Shared template wording about an amyloid-specific Deep follow-up is not evidence of a Deep run for this topic; the dated source records establish the actual use and access limits. Primary identifiers, selected abstract passages, correction notices and available primary-body passages were cross-checked. Generated absence cells, duplicate milestones and unsupported access claims were rejected."
}