Table 3 summarises loaf volume and firmness of dietary fibresupplemented
breads. All dietary fibre-supplemented breads had
significantly lower loaf volume and firmer texture than control
bread (no added fibre). Pomeranz, Shogren, Finney, and Bechtel
(1977) suggested that added fibre reduces loaf volume by diluting
gluten content and changing crumb structures, which in turns impairs
carbon dioxide retention.