In this sweeping exploration of Metformin, we uncover the remarkable transformation of a medieval herbal remedy into one of the world’s most essential medicines for managing type 2 diabetes. Originating from Galega officinalis—also known as goat’s rue—this botanical curiosity led scientists on a century-long quest, culminating in the rediscovery of Metformin after earlier biguanides proved too toxic. The episode traces its winding regulatory journey, including a decades-long delay before FDA approval, and reveals how wartime malaria research helped revive its potential. We break down how Metformin lowers blood glucose primarily by reducing liver glucose production, while also enhancing insulin sensitivity and modestly improving weight and lipid profiles. Key clinical trials like UKPDS and newer studies highlight its cardiovascular benefi ...