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AbstractThis study reports the green synthesis of Berberis vulgaris root water-mediated silver nanoparticles (BvAgNPs) showcasing high purity, size-controlled morphology, and potential anti-diabetic activity. Characterization techniques confirmed the successful synthesis of predominantly spherical BvAgNPs within the 15–70 nm range, coated with organic moieties from the extract. Remarkably, BvAgNPs exhibited significantly enhanced α-amylase and α-glucosidase inhibitory activity compared to the extract alone, with inhibition higher for α-amylase. This superior anti-diabetic activity, even comparable to the standard drug Acarbose for α-amylase inhibition, highlights the potential of BvAgNPs as natural and potentially less-toxic alternatives in diabetes management. Further research on their mechanisms and in vivo efficiency is warranted to pave the way for their future application as promising anti-diabetic therapeutics. [ABSTRACT FROM AUTHOR]