CLAIM CARD
The background evidence for metformin effects is heterogeneous rather than uniformly confirmatory. Direct clinical sources such as Hong 2026, Seo 2026, Ratajczak 2026 are interpreted separately from mechanistic studies such as the retained evidence base, because these evidence roles answer different questions about aging biology and clinical translation.
Evidence grade: exploratory
Contradiction status: none
Publication: 5f566366-fb20-4402-ba24-c1117573f97f
Provenance: Derivation Web chain
Citation Support
source_1Zaveri 2026source_2Wu 2026source_3Hong 2026source_4Lee 2026source_5Seo 2026