"There's also the addition of wild tuber flour into it which provides a rather nutty, bitter flavour to it." Bread flour is usually a white flour made from hard wheat and so it is actually bigger in protein than all-purpose flour. It's unbleached and has from twelve% to 15% protein. https://knmasters92580.blogproducer.com/34235128/detailed-notes-on-how-to-make-bread-basics