Glycemic index
Bread has two personalities:
As with any food, it's never a good idea to consume too much. And the type of flour makes all the difference.
Breads made of white flour have a medium-high glycemic index as opposed to whole-wheat flour or multi-grain, which have a low-medium glycemix index.
The higher the glycemic index, the shorter the period of satiety will be. You can lower the glycemic index, however, by consuming it with other foods, such as vegetables, meat, dairy products, etc.
Note: All processed bread products (crispbreads, crackers, bagels, breakfast bars etc.) have an elevated glycemic index, in addition to added fats and sugar (for preservation). Always opt for fresh bread if possible because it's much lower in calories.