Another food also banned from the US because of its coumarin content is the herb Hierochloe odorata, also known as bison grass or sweet grass. It's an important

Another food also banned from the US because of its coumarin content is the herb Hierochloe odorata, also known as bison grass or sweet grass. It's an important ingredient in Żubrówka vodka. For this reason, the Żubrówka you can purchase in the US is essentially fake, containing ingredients meant to simulate or approximate coumarin.