Fast sugars and concentrated sugars or both

When you eat food it can contains either fast sugars or concentrated sugars. Fast sugars are simple or diosides which mean that two molecules of sugar are attached.

Glucose, fructose, saccharose (sucrose), lactose, are sweet. You feel the taste of sugar!

Concentrated sugars are chain of glucose.

Starch, glycogen, other polysaccharides are not sweet but their are concentrated glucose under the form of trains which each wagon is a molecule of glucose.

It is misleading to call concentrated sugars as slow sugars! They represent on the contrary a big carb load for the body metabolism.