RESEARKA

Its glucose-lowering action is mediated primarily through suppression of hepatic gluconeogenesis and enhancement of peripheral insulin sensitivity, effects that have made it the backbone of combination regimens tested across dozens of recent trials. Beyond glycemic control, metformin effects appear to encompass anti-inflammatory and immunomodulatory properties, as evidenced by increased circulating GDF15 levels observed in human experimental studies (Kolnes 2026). The drug is available worldwide, costs pennies per dose in many health systems, and has a well-characterized safety profile, though gastrointestinal intolerance affects a meaningful minority of users and may require formulation adjustments or probiotic co-administration (Ratajczak 2026; Alshadfan 2026). Concerns about vitamin B12 depletion with chronic use (Tahir 2026) and questions regarding safety in advanced chronic kidney disease or very elderly populations (Marchini 2026) temper enthusiasm and underscore that metformin effects must be weighed against its risk profile in any repurposing context. The regulatory and practical advantages of metformin are clear, but whether these advantages translate to demonstrable anti-aging efficacy in humans has been proposed but remains to be confirmed.

Citation Support

• source_1 Zaveri 2026
• source_2 Wu 2026
• source_3 Hong 2026
• source_4 Lee 2026
• source_5 Seo 2026