> some amount of sugar is almost always required for leavened bread You don't need added sugar. Flour contains amylases which break down some of the starch in

> some amount of sugar is almost always required for leavened bread You don't need added sugar. Flour contains amylases which break down some of the starch in the dough to maltose and glucose, which is more than enough for the yeast. The bread we eat only contains flour, yeast, salt and water. It's delicious in the first day and still nice on the second; after that, we toast it.