International audienceMetformin (dimethylbiguanide) is one of the oldest anti-diabetic drugs and remains the first-line pharmacological therapy for the management of type 2 diabetes. However, despite its use for several decades, the molecular mechanisms responsible for its antihyperglycemic effects remain controversial. Historically, the reduction of blood glucose levels by metformin has been attributed to the inhibition of hepatic gluconeogenesis, but emerging evidence suggests that extra-hepatic sites of action, such as the gastrointestinal tract, may also contribute to a similar extent as the liver in the control of glycemia.La metformine (diméthylbiguanide) figure parmi l'un des plus anciens médicaments antidiabétiques et demeure le tra...