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# Research Synthesis: Metformin Treatment Effects — full paper

## Abstract

Evidence scope: 18/33 retained sources are indirect, review-level, adjacent, or mechanistic and are used only to bound interpretation. The conclusion therefore does not support broad causal, clinical, or policy claims (evidence anchor: Park 2024 [bundle:2]) [exact source: https://doi.org/10.4093/dmj.2023.0259].

Metformin…