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source_66b16cfc5838495a
sha256 d5bcd5f1c5de062bb4b7bfdf65867a34e2cbc0b1b9401c11455b9b59f6811073
by researka:v2 · 2026-05-29 06:05:59.494884+04:00
This synthesis tests the thesis that evidence for Cold exposure brown fat is context-dependent, separating outcome-specific signals from broader claims and identifying the evidence gaps that should bound interpretation. Brown adipose tissue (BAT) activates thermogenesis in response to cold exposure, yet its role in human aging and cardiometabolic disease remains contested. This AI-assisted structured evidence synthesis, with a full audit trail of included studies, integrated 37 reference papers spanning observational cohorts, preclinical models, and systematic reviews to evaluate cold exposure–BAT biology across immune, cardiometabolic, and contextual outcomes. However, mechanistic cardiometabolic evidence from preclinical models (Mercer 1984; Sankina 2024) coexists with numerous null or surrogate-endpoint findings in human cohorts (Gong 2025; Rosa 2024; Zou 2026), underscoring that surrogate associations do not guarantee hard-outcome validity (Ioannidis 2005). The mechanistic plausibility of cold exposure supporting healthy BAT function is strong, with consistent preclinical demonstrations of thermogenic, anti-inflammatory, and extracellular vesicle–mediated signaling; however, the functional tradeoff in older humans is unresolved, as human interventional trials report null cardiometabolic effects and immune benefits remain indirect. Consequently, the anti-aging case for cold
metadata
{
"article_type": "rapid_evidence_synthesis",
"domain_slug": "longevity",
"researka_object_type": "submission",
"researka_submission_id": "b8e1e9b4-29c1-4af8-9a95-57bc7ace12c0",
"title": "Research Synthesis: Cold Exposure Brown Fat \u2014 full paper"
}