they use the juice of beetroot or that made form the magic of HEME anyway NBD know a fantastic recepie for a Gluten steak,that even has sinues ,its just a matter of the lour and yeast combo,and using a lit of garlic,and a kneeding th doe and a good pressure cooker, you would not know the diff if it was on you plate, might post the recepie, but am worried it will be pinched,by some big company