"The intestinal wall controls what particles can pass through, and in the case of sugars, it only allows one at a time. Picture a revolving door; two people holding hands are walking toward the door but must let go of each other to enter the doorway. Sucrose is like two friends, one named glucose and one fructose, holding hands. This link must be broken, so that glucose and fructose can find their specific doorway, go through it and go into the bloodstream."