Goat's-rue, Galega, Professor-weed, Goat's rue (Galega officinalis L.) Widely distributed throughout temperate regions of the world, predominantly in Europe, Once used in traditional medicine over centuries, G. officinalis is at the foundation of the biguanide class of antidiabetic drugs, which also included phenformin and buformin (both discontinued)
G. officinalis contains the phytochemicals, galegine and guanidine, both of which decrease blood sugar, but were discovered to cause adverse effects in human studies. Mr Pitigliano, Tuscany, Italy June 2018