Why is there a sweetish taste when chewing bread for a long time?

The fact is that bread contains a large amount of carbohydrates. Saliva is secreted in the mouth. It is needed not only for the easy passage of food through the esophagus into the stomach. Saliva contains some substances that disinfect food. Also, saliva contains digestive enzymes that break down carbohydrates. Starch is broken down into simpler structures – glucose. The sweet aftertaste comes from glucose. If we drop iodine on the bread, we will see that it contains starch.