The difference between wholemeal wheat bread and white wheat bread lies in the way wheat grains are processed. Wholemeal bread is made with wholemeal flour, which is milled to include the three different parts of the whole wheat grains (the fibre-rich bran, the endosperm and the nutrient-dense germ) in adequate proportions. In contrast, white wheat bread is made from refined flour which only contains the endosperm part.

As wholemeal breads contain all the nutritious parts of a grain they are much more nutritious than white breads.