{
  "title": "What this review means",
  "includeSubclaimIllustrations": false,
  "redteamReviewed": true,
  "accessNotice": "Source checking used bounded original primary abstract passages/status records and selected original partial-body passages. No complete-abstract or complete-paper audit, or independent scientific peer review, is claimed. Detailed access counts and limitations appear in the review.",
  "overview": "Sauna changes cardiovascular physiology and may improve selected clinical function, but the evidence does not yet establish that habitual sauna itself prevents hard cardiovascular events across adults.",
  "implications": "Primary-subclaim aggregation returns SC2 Γ: prospective mortality associations and meaningful controlled physiology/function supply a coherent biological rationale, while same-scope hard-event causal identification remains unverified. This is unconfirmed prevention, not evidence that sauna is physiologically inert or that every heat, cold or neuromodulation intervention is ineffective. The 'epiphenomenon' label means a causal role in preventing heart attacks, strokes or cardiovascular deaths is not established by the evidence, not that sauna has no effect: randomized trials show it lowers blood pressure and improves some heart-failure measures.",
  "limitations": "Confidence reflects evidence density and reproducibility: multiple heat/sauna studies with partial replication but heterogeneous comparators, modalities and endpoints; reviewer access depth does not set the band. The grade applies to the exact registered claim; stronger findings for narrower subclaims remain separate. No complete-paper audit or blinded calibration is claimed. This educational review does not establish an individual treatment recommendation."
}