Metformin (the diabetes drug being evaluated for longevity in the TAME trial) activates AMPK and reduces mTOR activity, slowing processes that drive cellular senescence. Senolytics eliminate senescent cells that have already formed. The combination is theoretically synergistic: metformin reduces senescence induction rate; senolytics clear existing burden.

Can metformin and quercetin be taken together?

At standard supplement doses of quercetin (200–500 mg/day), the OCT2 transporter competition with metformin is minimal. Inform your prescribing physician regardless. High-dose quercetin (1,000 mg) on senolytic burst days with metformin warrants physician awareness.

Is berberine a natural metformin substitute?

Berberine activates AMPK via the same indirect mechanism as metformin (mitochondrial complex I inhibition) and shows comparable glycemic effects in some trials. It is OTC and may substitute for metformin in the AMPK pathway component of this stack.