|MadSci Network: General Biology|
Actually, very little of the bubblegum is digestible. As you chew bubblegum, the sugars in it are released and are absorbed within an hour or two. If you swallow the gum, most of it passes through the intestine without being absorbed and it excreted in the feces. A small part of the gum may be digested and absorbed within the first 24-36 hours after you swallow it.
Try the links in the MadSci Library for more information on General Biology.