Wholegrain refers to grain in which
the edible parts of the kernel - endosperm, germ and bran - are present in the
same ratio as in the intact kernel.
.

All grain is wholegrain
when first reaped from a field, but the bran and germ are usually removed
either in part or entirely during grinding. If the grain still contains its
original composition after being ground, it is considered wholegrain regardless
of the grain type or whether the end product is in the form of whole kernel or fine
flour.
Thus wholegrain is a naturally versatile food item - nothing has been removed
from or added to the kernel.
Traditionally, rye bread has been available with a high
wholegrain content - even 100 percent of the grain ingredients.
On the other hand, wheat normally used in baking has previously consisted of
refined wheat flour that has contained the endosperm, and wholegrain has solely
been added in the form of flour, bran or groats.
These days, rye and wheat bread with a 100 % wholegrain content is available at
grocery stores.