{
  "slug": "protein-muscle-aging",
  "file": "protein-muscle-aging.review.md (shipped review)",
  "authoring_model": "Sol 6.1",
  "adversarial_reviewer": "Claude Opus 5.5 (Anthropic)",
  "date": "2026-11-02",
  "round": "3 (independent; round-2 findings B-1 to B-6 already applied in the review)",
  "level_before": "Ε",
  "level_after": "Ε",
  "confidence_before": "Moderate",
  "confidence_after": "Moderate",
  "pmids_checked": 56,
  "pmids_failed": 0,
  "claims_spot_checked": 18,
  "findings": [
    {
      "id": "P1",
      "severity": "Major",
      "location": "evidence inventory/ledger; AT A GLANCE headline; Belief versus evidence; Rank 2 model; SC3 row; REVIEWER NOTES; reader-summary.json overview",
      "original": "PROMISS (PMID 34609621) absent. Headline: \"Higher protein intake can improve selected muscle outcomes in some nutritionally vulnerable older adults; adequate-intake cohorts often gain little, and lean-mass changes do not establish stronger or more functional muscle.\" REVIEWER NOTES: \"The direct positive gait result is secondary to a mass-powered trial and needs confirmation with a functional primary endpoint.\"",
      "corrected": "Add PROMISS as a ledger row and discriminating contrast (direction supports; not decisive) with caveats. Headline: \"Higher protein intake can improve selected muscle outcomes in some older adults - most clearly in nutritionally vulnerable groups, with one open-label trial also reporting a walking benefit in community-dwelling adults whose habitual intake was near the allowance; other controlled trials at similar intake find no benefit, and lean-mass changes do not establish stronger or more functional muscle.\" REVIEWER NOTES: \"The Park gait result is secondary to a mass-powered trial; PROMISS (PMID 34609621) supplies a functional-primary positive in a different, non-malnourished population, but it is open-label, co-increased energy intake and lost significance per protocol, so independent blinded replication is still needed.\"",
      "evidence": "PMC8490609 full text: n=276, age >=65, habitual intake <1.0 g/kg aBW/d (mean ~0.8 per PMIDs 36678203, 37960220), 6 months; primary 400-m walk -12.4 s (95% CI -21.8 to -2.9); leg extension +32.6 N. Caveats: unblinded, no-advice control, +107 kcal/d energy, 37.5% reached target, per-protocol not significant, PROT+TIMING -4.9 s (CI crosses zero). Main result confirmed by PMID 37347495. In scope for the registered claim; contradicts the headline boundary and the stated absence of a functional-primary confirmation; OPTIMen (usual intake <=0.83 g/kg/d) null at similar baseline intake. Level and confidence unchanged: a single open-label, energy-confounded positive does not meet Zeta reproducibility."
    },
    {
      "id": "P2",
      "severity": "Minor",
      "location": "Upward threshold ladder, SC2 and SC3 Delta and Epsilon lines",
      "original": "Satisfied: yes.",
      "corrected": "Satisfied: yes. [22] 0.8/1.2/1.5 g/kg trial in 120 malnourished pre-frail or frail adults: 1.5 g/kg improved gait speed versus 0.8 g/kg (0.09 vs 0.04 m/s, P = 0.039), a secondary endpoint in a trial powered on appendicular muscle mass; the 1.2 g/kg arm was null. (wording for SC3 Epsilon; analogous for the other three lines)",
      "evidence": "Score card thresholds_tested lists supporting_evidence [22] for all four crossings; prose prints none. Park abstract (PMID 30475969) confirms ASM/SMI primary and gait secondary at P=0.039."
    },
    {
      "id": "P3",
      "severity": "Minor",
      "location": "COMPETING MECHANISTIC MODELS, Rank 1",
      "original": "CALM, PRO-Elderly and healthy 24-week training studies show exercise benefits with null protein add-ons",
      "corrected": "PRO-Elderly and a healthy 24-week training study show exercise benefits with null protein add-ons, and CALM shows null protein-only arms alongside effective heavy loading",
      "evidence": "CALM (PMID 33564844) has no training-only arm; the same paragraph, AT A GLANCE and the Evidence section say so. Internal contradiction."
    },
    {
      "id": "P4",
      "severity": "Minor",
      "location": "reader-summary.json limitations",
      "original": "56 primary reports with 4 selected partial-body examinations; density, heterogeneous controls and incomplete access set the confidence, not correctness.",
      "corrected": "56 primary reports with 4 selected partial-body examinations. Confidence is Moderate because the trials differ in formulation, achieved intake, comparator and endpoint, and positive and null results do not reproduce across baseline contexts; access depth is recorded separately and does not set the band.",
      "evidence": "Round-2 B-3 struck access depth from final_score.confidence_rationale; the score card is corrected but the reader summary still prints the struck wording. Also reported, not corrected: redteamReviewed false while the review is marked approved."
    },
    {
      "id": "P5",
      "severity": "Minor",
      "location": "COMPETING MECHANISTIC MODELS, Rank 2",
      "original": "Rank 2 cites supporting positives with only a generic caveat.",
      "corrected": "Append: \"A pooled individual-participant analysis of nine RCTs in malnourished or at-risk older adults (PMID 37432139) found no overall effect of nutritional interventions on handgrip strength, and OPTIMen and PROMISS - with similar near-allowance habitual intake - point in opposite directions, so baseline nutritional status is not yet a validated responder rule.\"",
      "evidence": "van Zwienen-Pot 2023 Nutrients (PMID 37432139, DOI 10.3390/nu15092025), abstract: no overall treatment effect on handgrip (OR 1.11, 95% CI 0.78-1.59). Tournament fairness; rank order need not change."
    },
    {
      "id": "P6",
      "severity": "Minor",
      "location": "Subclaim matrix SC3 row (headline-setting) and remaining fused-token passages",
      "original": "A quantified0.8/1.2/1.5g/kg trial in baseline malnourishedpre/frail elders shows a modest gait benefit at1.5g/kg over12weeks, with the intermediate armnull. A frail protein-only24week trial also reportsSPPB benefit while mass is unchanged, though its exact totaldose is not verified in the original abstract. Controlled0.8vs1.3g/kg feeding in stable function-limited men and one-year/sarcopenia trials are null.",
      "corrected": "A quantified 0.8/1.2/1.5 g/kg trial in baseline malnourished pre-frail or frail elders shows a modest gait benefit at 1.5 g/kg over 12 weeks, with the intermediate arm null. A frail protein-only 24-week trial also reports SPPB benefit while mass is unchanged, though its exact total dose is not verified in the original abstract. Controlled 0.8 vs 1.3 g/kg feeding in stable function-limited men and one-year sarcopenia trials are null.",
      "evidence": "Carried forward from round-2 B-1 (about 480 fused tokens deferred to an upstream regeneration that has not occurred). Whitespace only; no content change."
    },
    {
      "id": "P7",
      "severity": "Editorial",
      "location": "Cap audit field-valid definitions SC1-SC4; Upward threshold ladder Delta lines",
      "original": "Literal metabolism/aging rubric text (lifespan/healthspan extension; developmental effects) printed without label; SC3 Delta marked satisfied by a 12-week gait change.",
      "corrected": "Prefix each quotation with: \"Literal shipped metabolism/aging rubric text (lifespan/healthspan wording); the applied clinical adaptation is stated below:\"",
      "evidence": "Adaptation is declared in Rubric fit and the applied-criterion lines, so not template bleed, but misleading to a lay reader. Label only."
    }
  ],
  "rejected_findings": [
    "Aggregation: primary-subclaim SC3 = Ε; weakest-link min(Γ,Ε,Ε,Γ)=Γ and scope-matched Ε correctly reported; SC1 biomarker cap applied before aggregation.",
    "Tally 1 positive / 23 discriminating / 8 decisive matches the score card inventory (decisive: [1],[2],[3],[14],[22],[28],[53],[54]).",
    "Verreijen 2017 grip and 4-m gait protein-by-exercise interactions confirmed in PMC full text (P=0.030, P=0.045); round-2 residual limitation closed.",
    "No template bleed: 'HIV' appears only inside rejected finding R-10 as the subject of that check.",
    "Momentum 'Mechanistic only' and Stability 'Stable' consistent across table, prose and score card; PROMISS is completed work and changes neither.",
    "Kang 2019 indexed as RCT but self-described case-control; the review flags it and does not count it decisive.",
    "Bagheri 2026 (women 40-77) not used as a positive or decisive unit; no correction needed.",
    "Collagen 2015 correctly held out of the clinical crossing pending corrigendum contents.",
    "Role of mechanism step 5 derived from causal direction, not tournament rank.",
    "CALM registry NCT02034760 not printed in the review; round-2 B-6 registry statement remains accurate.",
    "Reference year offsets of one are e-pub versus issue year, not errors."
  ],
  "additional_pmids_verified": ["34609621", "37347495", "36678203", "37960220", "37432139", "42942938", "42712362"],
  "validator": "not re-run; no file changed in this pass",
  "scorecard_changed": false,
  "related_files": {
    "embedded_prior_pass": "protein-muscle-aging.review.md section 'ADVERSARIAL REVIEW AND APPROVAL' (round 2, 2026-10-14, B-1 to B-6 applied)",
    "reader_summary": "reader-summary.json - P4 applies"
  },
  "residual_limitations": [
    "Network meta-analyses PMIDs 42942938 and 42712362 pool multi-ingredient or exercise-combined formulations and were not used as findings.",
    "Ten Haaf 2018 trial (cited by PROMISS) not separately retrieved; not asserted.",
    "Park 2018 and Tieland 2012 checked at abstract depth only (no PMC full text)."
  ]
}