As it is pointed out in the passage the ingredients of bread .

The beauty of bread is its simplicity. Flour and
liquid are the main ingredients, along with yeast
and sometimes salt and from these basics we
get a nourishing and tasty food that gives us
carbonhydrate, protein, and B vitamins, and
comes in a wide variety of shape, textures, and
flavors. Practically every culture has its own type
of bread and many have more than one. For
centuries it was the white breads that were
popular; but nowadays more and more people,
rightly prefer the brown village type of bread
which contains far more vitamins and is also
much tastier.