Research Synthesis: Epigenetic Clocks — full paper

Researka accepted publication: 9e9f3163-3f3b-4c1f-9790-a8b1400b8696 Source submission: c3970068-614b-437f-8ae9-14771ee32227 Evidence-honesty note: 35/44 retained sources are coded as null or no extracted directional signal; this corpus is non-supportive for clinical efficacy claims and hypothesis-generating only. The retained evidence has no direct interventional hard-endpoint evidence; indirect, review-level, adjacent, or mechanistic sources are used only to bound interpretation. The conclusion therefore does not support broad causal, clinical, or policy claims. This paper synthesizes epigenetic clocks as an aging-related intervention across 44 included source papers and 1357 high-confidence extracted claims. The evidence profile contains no sources classified primarily as direct interventional hard-endpoint evidence, 38 adjacent clinical sources, and 4 mechanistic or model-system sources, with 509 cross-study disagreements across the evidence base. No single positive outcome class dominates the retained corpus; null signals cluster in the contextual adjacent evidence, immune and inflammation, longevity outcome classes, and negative signals cluster in the contextual adjacent evidence and longevity outcome classes. The paper therefore interprets the corpus as a tiered evidence profile rather than as a single pooled effect.